Mercury 2 stroke outboard no spark. Kill switch is functioning properly.
9 that has fuel,spark and compression yet won't run. 2 & 5 would be on one winding. 5. 9 and swapped over the electric start and carb from that engine to replace the problematic thermal carb in the original engine and gain electric start. May 25, 2017 · After a while I was able to get it going enough to putz back to the launch. 6. huna1 Oct 12, 2023 · Tested all 4 coils and they all fell within the acceptable range. I will kee Aug 16, 2001 · I am trying to get a 1971 7. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. I have a 9. Often a faulty CDI unit will see intermittent or no spark on cylinders and may only breakdown when your engine warms up. Any idea what could be the issue ? Jun 4, 2023 · The world of outboard engines is vast and filled with numerous brands and models, but one that notably stands out is the Mercury 40 HP 2-stroke engine. Tested stator shows weak. OptiMax 225XS V6 2-Stroke 2-Stroke: QC12GMC Jul 11, 2012 · I have replaced 2 voltage regulators with CDI brand , 2 of 6 coils with CDI brand, 2 switch boxes with CDI brand, rebuilt fuel pump, replaced all fuel lines and filter, added a water separator, 6 spark plugs, spark plug wires, new reeds from Chris Carson Marine with fiber glass and stuffer kits, disassembled carbs and cleaned - twice. I have the factory service manual and started the test procedure, here is what I found. May 3, 2013 · I have a 2 Stroke Mercury 20 hp Tiller w/ a pull start. Was doing some trouble shooting found 2 yellow wires on voltage regulator at the connectors melted together, yes both yellow wires seared together. I'll just take it back to the dealer for more warranty repair. 9 MLA4ST MFG 96 I installed a Factory Battery Charging Kit years ago and have had no issues. 2. However it refuses to start, just occasionally kicking back and trying to pull the pull start handle out of my hand. What should I be getting for voltage out of the Primary? Looking for a couple of quick troubleshooting steps to see whats going on. Tested spark none The CDI unit or ignition box is responsible for storing spark from the stator and transferring it to the ignition coil via signal from the trigger. We tried spraying starter fluid into the intake - but no-go. Each one fires two cylinders opposite each other in timing. Apr 2, 2020 · First time poster - looking for help on diagnosing an '87 9. Kill switch is functioning properly. This one has had a new lower unit, 2 water pumps, and now it's broken again. 1, plug 3 like it's never seen spark of fuel in its life! - Swapped coil positions to see if the issue moved. Oct 19, 2016 · I installed my spark tester and nothing. they later said to remove the end spark pug connector and read directly to the wire Apr 7, 2011 · Hello all, I have a question regarding a Mercury 2. Both times it was just one plug out of three. i have verified that the lanyard switch is good but still have no spark . To ensure your 2-stroke outboard engine reaches its full RPM potential, regularly inspect and replace spark plugs as needed. But one of the wire from the stator to the switch box and two wires from "No spark problem - I have ple "No spark problem - I have plenty of fuel & Power. through this I've found that every once in a while I'll hear a pop and see a poof of May 24, 2010 · I have a 09 Merc 50 2 stroke. 4. Swapped no. I laid it down flat on the wrong side - not the handle side. Spray a lot of WD40 in again and quickly put the spark plug back in and connect the spark plug wire. Feb 6, 2022 · Part 2 - 20 hp Mercury - Bogs & Stalls at WOT - Is it a Fuel or Electrical Problem? Let’s Find Outhttps://youtu. I haven't been able to find out what readings I'm looking for on the coil, stator, or trigger assembly for this motor. 9 horse mercury outboard dosn't have any spark. Mercury 9. Jun 9, 2020 · Have a 20 hp 4 stroke 2011 ran 3 trips, fresh oil fuel perfect. 3. May 17, 2018 · Hi there, I’m fairly new to boating, and just got my first boat last year. It’s a 1989 thunder craft with an 80hp mercury 2 stroke outboard (3 cylinder). See a good spark when I pull. Motor started up as usual took out on a slow cruise and 10 minutes into the ride at Aug 4, 2010 · I have a 2000 Mercury 40 HP 2 stroke (says Tracker on the cover) on a 18ft suntracker pb. Pull the starter rope through until all the water has been pumped out of the cylinder. I appreciate your help. Jan 23, 2022 · Went fishing with my Mercury 4 stroke electric start yesterday and it started first pop but would not get up to full revs. Jul 23, 2008 · Stator - Swap the red with the red/white wires and the blue with the blue/white wires - if the spark moves to the other 2 cyls the stator is bad. In what kind of condition is I have a 2000 mercury 9. NGK BPR6HS-10. Standard Spark Plug Manufacturer's No. 2hp two-stroke outboard which will not start. Also noticing some gas sitting at the bottom inside the engine block. 9 K ohms to 7. Apr 19, 2024 · Hello. Went to go out on Monday after a bad day at work and it would not start. Mercury Part Number. Who wins in a race between a new Mercury 4-stroke and an old, 25hp 2-stroke?We found out first-hand the risk of buying a second hand 25hp 2Stroke, upon inspe Feb 28, 2010 · Re: Mercury 60hp 2 stroke no power revving fine on muffs doesn't mean much. Mar 28, 2023 · Symptom 2: Trouble During the Engine Activation. ) Compression Test118 #1, 120 #2, 120 #3, 119 #4 2. Engine ran good but lost spark. Here’s a step-by-step guide: Safety First : Always turn off the engine and let it cool before attempting any work on the spark plugs to avoid burns or accidents. After many attempts, my '92 Merc 40 2 Stroke 4 Cylinder won't start or even bark. I read your post about a bad ground. N. I tested the two green and white wires coming from stator and it reads 0 ohms . 040. Maybe beause of trying to start it for minutes with no spark? Mechanic's Assistant: Have you checked the spark plugs to see if they are fouled or worn out? They were changed last year. 1 for no. Spark plugs are integral to your engine. I have 2 of these motors and this one has been problematic since day one. My name is Henry and I have a 60 hp mercury tracker outboard motor that has no spark. Has good compression on all 3. Checking oil full, motor restarted and ran and quit. BTW, never ever push it past 1500-2000rpm without a load (ie on muffs). Ran great. Thread starter huna1; Start date Jul 10, 2008; H. Nov 22, 2016 #1 Hello, Mar 12, 2019 · Hello, I'm working on a 1989 8 HP Mercury 2 Stroke that has no spark. We stopped a few times and it started up but not easily then would not start at all. I appreciate the support. 9 hp 4 stroke outboard for my inflatable. The starter turns over just fine, but it doesn't fire at all. Proper lubrication is vital for the smooth operation and longevity of your Mercury 2 Stroke Outboard motor’s moving parts. Watch the video and find the link for the switchbox in the description. It is turning over strongly and the battery is almost new. chatenever Mar 15, 2020 · Learn how to test a CDI switchbox on a Mercury outboard motor with Dr. Specifically Mercury step by step knowledge on how to check each component of the electronic ignition. Used a Lisle 20610 spark tester and found I now have no spark on all 4 plugs. plugs are clean, no water, not fowled. I did find the kill switch was corroded and was not connecting to ground. Check out the trigger connections by ohming 1-4, 2-5, and 3-6. instead of pulling like crazy I've taken the pull start off and spin the flywheel with a drill and socket. Checked resistance on #2 coil wire and it was fine. Suppressor(resistor) Spark Plug Mecury No. May 30, 2023 · Overheating in a Mercury 2 stroke outboard could be caused by a clogged or damaged water pump, blocked or damaged cooling passages, or a faulty thermostat. Motor is 75 HP Mecury outboard. The engine cranks but it will not fire. mrp724 Recruit. They seem to be one of the more common motors to have issues with spark. 2001 Mercury 15hp no spark. If I need to remove them No spark on either cylinder. 4hp Mercury 4-stroke NO SPARK 4hp Mercury 4-stroke NO SPARK. Early 90's. 5: 0A855097 and up. 9 up 2 stroke mercury outboard and I'm not getting any spark, the plugs are new and still no spark, I'm not very mechanical when it comes to marine motors, anyone have any ideas of what I should look for and how to test to make sure that it's the issue? Aug 26, 2019 · I have a 2008 mercury 150 opitmax outboard, couple of weeks ago the motor started missing and running rough. Mercury mariner 25 hp 2 stroke NO SPARK Mercury mariner 25 hp 2 stroke NO SPARK. ) outboard motor parts by serial number range and buy discount parts from our large online inventory. T-Mikes Website https://t-mikesvintageoutboards. the tech support from Mercury originally said the resistance should be between10. Feb 25, 2012 · Re: Mercury 25 hp efi no spark Checked red tether cord that's fine. Thread starter huna1 2001 Mercury 15hp no spark. Jun 2, 2023 · A 2-stroke outboard bogs down at full throttle due to various reasons, including clogged fuel filters, dirty carburetors, damaged spark plugs, or an issue in the fuel-to-oil ratio. 3rd trip engine quit on plane, low oil pressure alarm came on as engine stopped. 9 4 Stroke Manual Start SN 0H009807 1997 9. Now will not start. 9 hp question - I have a 2007 Mercury 9. About 15+ years ago, I found an early 90's 9. Jun 14, 2013 · The first thing I would check on this model since you have lost spark on all three cylinders is the kill circuit. 3 but made no difference to the results. Mercury Mariner Outboard Forum . And it did not. This is a common 1998 and 2004 Mercury 115 2 stroke problem. Plenty of gas in tank, next May 16, 2011 · Re: Mercury Mariner 90hp no ignition spark help Thats a good idea and I just ran out to try it with no spark so to see what is next. I checked for spark on both cylinders with an in-line tester, and no spark. By regularly cleaning and flushing your Mercury 2 Stroke Outboard motor, you can prevent corrosion, improve performance, and extend the life of your engine. 7 K ohms and said if it didn't replace the coil. com/ T-Mikes Ebay Store https://www. Thank you so much. From big fish and big adventures to the next big job, make the most of what’s waiting for you on the water with a hard-working, efficient, reliable Mercury TwoStroke outboard. Suppressor(resistor) Spark Plug Manufacturer's No. I have a Mercury 9. Thread starter mrp724; Start date Nov 22, 2016; M. I just spend the twilight hours taking off the frame that goes around the engine to give me a more readily access to the engine. Serial # OB115390. It was running great until I tried to put it in the water again this year. I'm thinking it's the cdi and don't mind spending the money if that's the problem. I was puzzled. Occasiona Standard Spark Plug . Symptom 3: Lack of Required Energy Jun 28, 2023 · Finding the right spark plug for your Mercury 2 Stroke Outboard in 2023 is an important task that will help ensure your boat runs smoothly and efficiently. Trigger - Swap the trigger wires from the 1&2 cyl (purple&white) with the wires to 3&4 cyl (brown&white/black) if the spark changes cyls it is a bad trigger. Well I did a little troubl Apr 25, 2021 · Quick video on the steps to identify a no spark issue on a 25hp Mariner. Keep in mind these reading are made while the parts are still on the motor. 33- 19796. I have replaced the stator, trigger, and Aug 25, 2010 · Re: 1980 Mercury 40hp turn over-no start problem To answer roncoop75, did not check spark with tester, pulled plugs, reattached plug wires to plugs and grounded against engine, turned ignition key, saw spark, blue in color. Enjoy your afternoon Henry. Jun 10, 2015 · See this video for information on making a DVA: https://youtu. It cranks fine and has fuel. The manual shows a "switch box", mine does not have a Mar 21, 2008 · Re: Mercury 150hp V6- No spark on one side Like laddies said, a lot of the time, the bad switch box (murkurese for power pack) is the one that fires, killing the other one through the bias circuit. be/juhri_NxQcQIn this video I go through testing the CDI ignition on and outboard motor to diag Aug 14, 2018 · I have a fairly straight forward diagnosing process for diagnosing the no spark on these switch box years of Mercury. 9 mercury 2 stroke ran one day won't run the next. Thread starter monk. 7 and 15. The points are used but dont look too bad. So far I have found there is Apr 5, 2023 · Hi guys ,new to the forum here. I just bought a 90 hp mercury, model 1c90412dd. fiberglass. Mar 17, 2012 · Mercury & Mariner Outboards I have no spark. Would anybody here have Mercury technical knowledge regarding a no spark condition on a 1992 merc 8hp. P. On shore tested COMPRESSION both low 60's# bad☹️ did not run leak down test. With this guide, you now have all the Lookup Mercury Marine 60 hp (3 cyl. It's a 2 stroke. Nov 12, 2011 · Mercury Outboard 9. Apr 12, 2013 · Hi everyone, new to the site. However, like any mechanical piece of equipment, there might be problems … Mercury 40 HP 2 Stroke Problems Jun 24, 2007 · Hey guys' my 9. Tell me a bit more about what's going on so the Marine Mechanic can help you best. Motor will spin over, but will not fire/spark. Undoubtedly, Mercury 50 HP 2-stroke is a reliable outboard engine, but it can encounter problems Mar 19, 2016 · I just bought a 14 ft jon boat with a 9. Aug 21, 2017 · I have tested three igniters the resistance to ground the high voltage lead to ground varied from 6. 9 hp , 2 stroke motor that needs a tiller arm , would a 2000 25 hp mercury out board model 25 ELH work , if not what tiller part # XXXXX work , thanks for your help . 0G098660 Also, here is a picture of the boat so Champion Spark Plugs for Mercury Outboard Motors. Pull the starter rope through several times. com/str/simtechfarms Feb 22, 2016 · Mercury Mariner Outboard Forum . james1015@gmail. 2 K ohms. So the cold starting process is as follows. Sep 22, 2019 · Mercury & Mariner Outboards . 9 an 0G094809. I will be riding along fine and bam it starts running like carp. Feb 27, 2024 · Probably the most overlooked part of the ignition system the trigger sends a signal to the CDI unit (power pack or switchbox) and tells it when to release voltage to the coil. They are the electrical devices responsible for igniting your combustion engine with a spark and helping it start. Somehow, after the last start, the motor is not fire. Could this mean that just the voltage regulator is bad and that Nov 19, 2013 · Re: 150 hp 2 stroke mercury outboard no spark That s/n comes up as: MERCURY - (150 H. Ran it for about an hour then it just died, would not start again. Checked no voltage to all 4 coils from the switch box. Removed the plugs. Motor: 1994 40hp 4cyl 2-stroke S. We removed the fuel filter and noticed it had Apr 20, 2014 · I cant get my 2009 Merc 9. Gap. neither cylinder. You raise that lever 1/2 to 2/3 of its travel which allows the engine to idle a little faster during warm up. Will stator #832075A4 interchange? … read more Nov 22, 2016 · 2006 Mercury 50 hp 2 stroke outboard no spark. Apr 18, 2021 · Will it run? In this weeks video, we will do a basic evaluation on my Force 120 hp outboard that came with my Project Pontoon. It sounds like it's just about to turn over but wont. Tested the spark tester on my Kawasaki John Deere with electronic ignition and it gave off a nice orange spark. com 184 Jones Drive Brandon, VT 05733 USA (800) 209-9624 (802) 247-4700 (802) 419-3055 Fax Feb 5, 2017 · I recently received a 90 hp mercury, 3 cylinder, year 88. The only thing that was changed is I added sta-bil to the gas Jan 18, 2014 · Re: 1989 Mercury Blackmax 150 no spark Operating the starter will cause the stator to power the switchboxes and generate spark. The spark is good, fuel is flowing ok and the carburettor is clean. Plug 1 wet fouled, plug 2 oily deposits but not as fouled as no. Been a great motor. If your Mercury 115 2-stroke outboard engine is not “peeing,” which refers to the water stream that should come out of the tell-tale hole, there could be several reasons why this is happening. Jul 11, 2012 · I have replaced 2 voltage regulators with CDI brand , 2 of 6 coils with CDI brand, 2 switch boxes with CDI brand, rebuilt fuel pump, replaced all fuel lines and filter, added a water separator, 6 spark plugs, spark plug wires, new reeds from Chris Carson Marine with fiber glass and stuffer kits, disassembled carbs and cleaned - twice. If either connection (trigger to 2 or 5) is bad, it would cause both cylinders to misfire. I downloaded a manual, but the manual shows 2 wires on my ignition coils, mine has a plug with 4 wires. I did some basic fault finding at the time and have found I have no spark at all (both plugs), Feb 8, 2009 · Re: Mercury 150, no spark on 2 cylinders The trigger actually has 3 winding in it. Spray a ton of WD40 or the like into the spark plug hole. The stator will also power the rectifier, and with the rectifier disconnected from the battery (you wanted to disconnect the wiring harness, right?) it will likely blow a diode or two. 9 to start, or even to act like it might start. Feb 14, 2020 · 2006 Mercury 25hp 4 stroke EFI - no spark. Replaced trigger switch due to bad wiring. Thread starter chatenever; Start date Feb 22, 2016; C. And needless to say, a weaker spark indicates poor engine start-up, which you will face if the stator needs slight to moderate repair. tried to restart, nothing. No spark in my mercury 1999 2 stroke 3 cylinders outboard. If nothing changes it's probably a bad box. Thread starter Tony Outboard; Start date Nov 29, 2021; T. Proper maintenance and troubleshooting can help identify the cause and solve the problem. be/CtqUxAF1H1QPart 3 - 20 hp Mercury - Bogs & Aug 11, 2005 · Help, I have just encountered some type of ignition failure on my 1995 25 HP 2 cycle Mercury outboard 0G153788. USA: 8075603 and up. We've tried everything we can think of. It ran great for Sep 2, 2013 · Bought a 1986 75 HP MercuryWas told only firing on 2 cylIn my experience, I have always been able to maintain a 2 stroke engine and have family resources to helpbut am at a standstill for now. Check these components, remove any debris or buildup, and replace damaged parts to resolve the issue. I thought I would again verify I had spark. I,ve replaced the ignition key switch , stator , trigger and regulator . (1997 )) Serial No: 0G549721 Model No: 1150422TD Parts and Service Bulletin List for s/n 0G549721: Search Results - Crowley Marine The service manual you need is 90-824052. 9 four stroke with no spark. 4-stroke outboard that won't start. Switched plugs around from cyl 1 and 2 and still no spark in cyl 2. Was flushing out on the flusher for several minutes and the engine just stopped. Gerry Oct 1, 2023 · Mercury 115 2 Stroke Not Peeing. Now I can not get the engine to start at all. I don't know much about the motor except it was clean and stored indoors for years. Jun 28, 2023 · Are you searching for the best spark plugs for a mercury 2-stroke outboard but had no luck so far? If yes, then you have reached the right place. com; Start date Jun 18, 2019 · 15 ft. I would assume that it's not the coils, because there are seperate coils for each cylinder, and neither plug will spark. Dec 27, 2015 · My brother has a very new 2015 Mercury 115 H. Is it possible for you to send me a picture of the Bad ground wire you greased, cleaned. Tony Portable Outboards - The water is full of big opportunities, waiting to be explored. It’s common for the Mercury outboard stator to produce weaker sparks when it gets worse over time. If you remove the bias jumper,and both work, that's your problem. Aug 3, 2023 · Inspect and replace faulty spark plugs and ignition components. … read more Nov 27, 2017 · 1. 1997 Mercury 9. Symptom 3: Lack of Required Energy Dec 30, 2007 · Recent work includes: All shift shaft seal and drive shaft seals replaced New gear oil Gearcase vacuum tested OK Spark & compression tests OK (compressions #1-160 #2-155) Replaced fuel pump diaphram Replaced battery terminals Checked water pump Replaced impellor due to wear Greased propellor shaft Checked carburator settins and synchronisation Jul 16, 2016 · The engine has no spark, although I have seen a very small and intermittent spark while testing for spark holding the wire about 1/16 from ground 99 % of the time I have no spark . 8. The owner wants it fixed and asked me to diagnose the problem and fix it. I also disconnected the black/yellow wire leading to the kill and tiller stop switches . my question is the motor starts and runs good in neutral and in gear when im testing it outside of the water (with water muffs) but once in the w … read more Apr 7, 2020 · I have a 2000 Mercury 60 HP 3 cyl 2 stroke outboard with no spark. Had the engine since new. I just got the boat and had it out about 4 times in the last 10 days. VIN OT095664. I pulled spark plugs they were wet and burned, I replaced them and still would not start. The fly wheel cranks no problem. 1 - check compression (you could have a bad, scuffed sleeve or snapped a ring) 2 - check for strong spark on all 3 cylinders (thoses triple can run on 2 without you noticing) Mar 29, 2021 · This 45 hp Mercury lost spark on all four cylinders. ) No spark on top 2 cyl Sep 3, 2008 · Dear All, I have a 1984 Mercury outboard 50HP. Aug 20, 2019 · Hi there Todd good afternoon I hope you’re enjoying your day. The Feb 10, 2008 · a Mercury 9. 040: 3. Joined Nov 22, 2016 Messages 1. The motor appears to be near new, no corrosion anywhere. 33-19796 NGK BPR6HS-10. 2. When I pic … Apr 24, 2021 · Another important episode of outboard care that can save you tons of hassle on the water; Get to know your outboard, the knowledge learned will make everyda Apr 29, 2010 · Re: 2002 mercury 150 no spark Direct Volt/Amps, a Volt/Ohm's Meter with a specific resistor and capacitor in-line, it puts a measured load on the charging system while charging the cap, the cap stabilizes the meter reading so you can read a steady voltage rather than a blip. Seems to be the switch box. With WOT I was basically trolling. Properly Lubricating Moving Parts. N/A: N/A. LK. MarineEngine. I have checked the wiring and found no breaks etc. I had just had the boat out of the water and did a water pump service, lower unit oil, and new plugs. Remove the spark plug 2. 33-8M0114743 NGK BP6HS-10. 9. So today I plugged in the harness to see if it got spark. I hoped Some else might shed some light on the likely cause. 0A855097 - 0G710612 Jan 24, 2013 · I have a 1969 mercury outboard 20hp 2 stroke it had spark maybe two weeks ago and now it won’t get spark I just replaced the stop switch with what I believe 20gage wires don’t know how to fix please help trying to get it ready for summer Jul 8, 2020 · I have tried to attach a picture but it won't let me upload any more photos. Every told me with this engine that Switch box (ECM) was bad. I hooked the two yellow wires together to bypass the neutral switch and still nothing. . 9 hp Mercury outboard serial #0G830487 Mar 12, 2019 · I'm working on a 1989 8 HP Mercury 2 Stroke that has no spark. 9 4 to 8 year old outboard 2 cycle. Everything seems to look alright at first glance. Known for their reliability and performance, these engines have become a popular choice for boating enthusiasts worldwide. I have some engine knowledge so I started with fuel. 1) Squeeze primer bulb until firm 2) Raise the fast idle lever 1/2 - 2/3 3) Push in the key and turn it to START. Mercury 4hp 2 stroke - No spark Mercury 4hp 2 stroke - No spark. ebay. I have determined the following: 1. Is the Stator, Trigger, Switch Feb 29, 2016 · The fast idle lever is the flat lever right at the top of the control box. 2 cycle model # oG20073 . If you would like a copy, PM me with an email address and I will forward a copy. I checked for spark in plugs May 1, 2011 · I have a 1997 2 stroke Mercury 25hp outboard, it has been running fine all summer (Australia) and this weekend, was running great for an hour when it lost all power and shut down (as if the kill switch was pulled) instantly no spluttering/ coughing etc. Jun 29, 2012 · Hello, i have a 1986 115 hp 2 stroke mercury outboard. Checked the wires from the cdi for cyl 2 and resistance was fine on those. Nov 15, 2019 · Depending on your outboard brand these units will go by different names but, they will all have the same function and that is to store voltage from the stator and release it to your ignition coil when the trigger tells it to. Here are some common causes and potential solutions: Aug 7, 2019 · Now, a new problem. The #1 plug has no spark, the other two both have spark. Was working couple weeks ago. There is no spark on either of the 2 cylinders. Trigger 211 ohms (168-252 Specs) Ignition Charge Coil 347 ohms. No spark to the spark plugs Oct 1, 2020 · Mercury 25hp tiller Stator replacement and troubleshooting no spark. But wont start now. A faulty trigger will result in no or intermittent spark and is often misdiagnosed as a fault with the power pack. In the past week it has fouled the plugs twice. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Change the plugs and it runs fine again. Now I can look into the carbs to see if there were any bug nests built inside. I tested spark and I have no spark on my top 2 cylinders. Got no spark when I pull it. Prior to putting it in the water, I tested it out after Hello I have a mercury 25hp 2stroke outboard circa 1988 what wont spark, not sure what to check next, help! tested the wires from the stator and trigger to switchbox, Im only able to check static readings as its a pull start & I have no peak reading meter just a standard multimeter set to ohms Nov 23, 2017 · How to diagnose a no spark on an outboard motor Aug 12, 2018 · its a 2004 15hp mercury 4 stroke model 15m4str, i check the park plug an theres no fire , i put a screwdriver in the plug cap an touch the motor an didnt received nothing , i unplug all the kill switch an i dont have any fire on the 2 plugs . 5 hp Mercury Comet outboard motor running but have no spark. This motor does have a mercury (the liquid metal) tilt "kill circuit that kills the ignition if the motor is tilted too far up (a safety thing) plus the normal kill (stop) circuit that runs up to the keyswitch. Hopefully this video helps someone. a 94 year modle. Could anyone tell me how to test the stator (p/n 336-3996)? Oct 25, 2008 · The Boating Forum - 2002 Merc 25hp 2 stroke (wont fire, no spark) - Fished all day and the mercury 2002 25 hp ran fine all day. yt dm tc hp rv cp hy rr ua hh