70 HP Evinrude Troubleshooting low RPM's...need advice

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Ken Vest

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Jun 17, 2011
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I have a 1993 Evinrude 70 HP. It will not run over 3200 RPM's (very slow), previously ran 4500 rpms. It dies when put in gear. I thought it was the fuel pump, so it has a new fuel pump, cleaned carburetors, new spark plugs, sparks have clean blue spark, checked coils. It just seems to have no power. Any ideas? Thanks.
 
oldcatamount

oldcatamount

Lieutenant Commander
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Apr 4, 2010
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1,740
Re: 70 HP Evinrude Troubleshooting low RPM's...need advice

That's a relatively new motor but, have you checked the compression? It sounds like a weak cylinder (or two).
 
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Daviet

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Sep 24, 2008
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8,958
Re: 70 HP Evinrude Troubleshooting low RPM's...need advice

Start with the basics, compression, spark and fuel delivery. Those engines would run pretty good on two cylinders.
 
fireman57

fireman57

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Aug 24, 2004
Messages
3,811
Re: 70 HP Evinrude Troubleshooting low RPM's...need advice

You will want to do a link n sync after you have removed the carbs. Might have been the problem all along. If the butterflies don't open at the right time.
 
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