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I can't get any spark to the plugs on my 40 horse Tohatsu outboard. The motor has been sitting unused for about 5 years. Brad

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Check your kill switch. Spark comes out of the stator, then to your coils

Posted on Oct 08, 2009

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Posted on Jan 02, 2017

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I have a 1995 25 horse tohatsu outboard and would like to us a fuel additive cleaner what do you think


a quality injector will be ok
to avoid problems do not use any e-mix fuels as the ethanol content attracts moisture that gives you fuel and injector problems

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What year is Tohatsu M15B2 serial number 351A33838 outboard


Hi!

You can contact Tohatsu directly using the form provided at the link below.

Hope this helps,
-Steve


http://www.tohatsu.com/contact/wiz_modelyear.html

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What year model is a mercury outboard 4 horse with serial number 3303712?


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Skipping, lack of power, 4 stroke mercruiser


has your boat been sitting more than 60 days. ethanol gas has been proven to only stay stable for 30 days in 90 degree + weather. Labor cost can be up to $100.00 per hour. CHEAP TEST- compression, spark, and fuel. TOOLS(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local dealer). I know all these are expensive but if your going to be a outboard owner you will always need them. TROUBLESHOOTING (1) check compression. without the year model I'm giving you a average numbers. Look at your Clymer manual for specific numbers. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark, fuel is the problem nine times out of ten. Drain gas tank,clean fuel lines replace primer bulb and replace all fuel filters. Finally replace spark plugs, I know spark plugs probably don't look bad but this is a outboard. Fresh spark plugs means less resistance for the ignition system. The ignition system is week compared to automotive. Test drive boat, if the problem is still there then there is further steps to take. Again I don't know the year model so I guessing its fuel injected. Pull out your clymer manual. what is great about the Clymer Manual for Novice techs is it gives detailed info on your outboard. Troubleshooting tips and teaches you how your outboard works.

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