4.3 mercruiser misses @ wot

rowdaboat

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Jun 15, 2003
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3
Purchace stingray/4.3 mercruiser engine misses at wot. RPMs reach 3000 max. Engine was not run for 2 years. Is this a fuel problem? If so what solutions are available.
 

snapperbait

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Aug 20, 2002
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5,754
Re: 4.3 mercruiser misses @ wot

Was the boat left to sit with old gas in the carburator and fuel tank?? If so you likely need to rebuild the carburator, change fuel filters, and pump out any old gas left in the fuel tank...<br /><br />Probably a good idea to change the spark plugs, inspect and replace the points & condinser along with a new cap & rotor, and finally, set the base timing to spec. Basicly a full tue up...<br /><br />A service manual would also help you track down the problem and provide all the information you may ever need about your engine... It's money well spent! ;)
 

rowdaboat

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Re: 4.3 mercruiser misses @ wot

Sorry didn't give you enough info. The boat was new 2000(had .3 hrs on it). Also its an EFI.
 

snapperbait

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Joined
Aug 20, 2002
Messages
5,754
Re: 4.3 mercruiser misses @ wot

Ok.. New fuel injectors maybe or have them cleaned.. New fuel filter and fuel still applies as well as spark plugs, distributor cap, and rotor... <br /><br /> Also, you can check the engines ecm (computer) for stored "trouble codes" , however you will need a code scanner like the Codemate (Part #94008 about $45) which is available at http://216.230.203.183/marine/marine.htm
 

rowdaboat

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Re: 4.3 mercruiser misses @ wot

Thanks for the help. I'll give your suggestions a try.
 
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