90 HP EVINRUDE V4 SHUTS OFF

[russrmartin]

Hey guys. My dad has a 1991 evinrude 90 hp V4 motor on his boat. Lately, when running it wide open, and only at wide open, the motor will run for about 3 to 5 minutes, then it dies. If running anything else other than wide open, it runs fine with no problems. I checked today and there is good flow of water thru the motor even at WOT, so I am pretty sure it's not overheating. The motor will usually start up right afterwards also. Just wondering if anyone has any ideas about this, and what to look for. Thanks in advance.<br /><br />Russ

 

[DJ]

Re: 90 HP EVINRUDE V4 SHUTS OFF

ross,<br /><br />Try running the engine with the fuel filler cap loose.<br /><br />If that does not do any good, take a look at the anti sighon valve on the built in fuel tank. It is usually part of the fuel pick up tube, or close to it.