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| Author |
Message |
    
Dale Liley
Member
Username: dliley
Post Number: 5
Registered: 04-2009
| | Posted on Thursday, July 16, 2009 - 07:14 pm: | 
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I have a 1994 120 Evinrude that runs like a champ then all of a sudden the ball is sucked flat, once I pump the ball back up the engine again runs great until the ball goes flat again, I have checked for a crack or leak at the fittings on the fuel line and the ball and everything appears to be fine, no leaks when I pump it up solid and apply more pressure on the ball |
IBNFISHN
Advanced Member
Username: ibnfshn
Post Number: 640
Registered: 11-2005
| | Posted on Thursday, July 16, 2009 - 09:03 pm: |
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Check your fuel tank vent for obstructions. |
jamie campbell
Advanced Member
Username: outboard_doctor
Post Number: 455
Registered: 02-2009
| | Posted on Thursday, July 16, 2009 - 09:15 pm: |
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Just adding to IBNFISHING has the tank got a antisiphon valve and i would replace the fuel primer |
Joe Reeves
Senior Member
Username: joereeves
Post Number: 7688
Registered: 02-2001
| | Posted on Thursday, July 16, 2009 - 11:55 pm: |
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(Fuel Anti Siphon Valve)
(J. Reeves)
Many of the later OMC V/6 engines incorporate a fuel restriction warning via a vacuum device attached to the powerhead. If the engine overheats, or if you have a fuel restriction, the warning is the same.... a steady constant beep.
NOTE... Only the V/6 & V/8 engines have the above "Fuel Restriction Warning". The warning horn will not sound on the other models.
The fact that a engine is not overheating, but the warning horn sounds off with a constant steady beep, and that the rpms drop drastically would indicate that the engine is starving for fuel due to a fuel restriction. Check the built in fuel tank where the rubber fuel line attaches to the tank fitting. That fitting is in all probability a "Anti Siphon" valve which is notorious for sticking in a semi closed position. It will be aluminum, about 2" long, and the insides of it will consist of a spring, a ball, and a ball seat. If this valve exists, remove it, knock out those inner components which will convert it to a straight through fitting, then re-install it. Hopefully that cures the problem.
The above procedure will cure a restriction problem with the anti siphon valve as stated. BUT, it may also allow fuel to drain backwards to the fuel tank when the engine is not running (siphoning backwards) due to the fact that the carburetors/fuel pump etc are higher than the fuel tank. This condition is not an absolute as the valves in the fuel primer bulb usually prevent this backwards siphoning problem. However.... if this does take place, the cure would be to install a new anti siphon valve.
Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:
http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store |
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