Logo
FULL SITE MENU

115 OMC Seadrive 1988

W

woods101

New member
OK....boat will idle fine out

OK....boat will idle fine out a 100+ yard channel but when I let it have it it runs for about 1/2 mile and starts missing. It looses rpm and will continue to run like crap.

Any Ideas
 
"sounds like a fuel--restricti

"sounds like a fuel--restriction,or overheat prob,to me.when was the last time,..u had it --professionally,tuned up?"
 
They now believe it is 100 per

They now believe it is 100 percent vro. they took the boat out and ran it. It is fine until it runs out of gas basically starving the carbs.
 
"If when running, the primer b

"If when running, the primer bulb has a tendency to be drawn flat, that indicates a fuel restriction between the fuel primer bulb and the fuel supply (usually a sticking anti siphon valve).

(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

If no fuel restriction exists, pump the fuel primer bulb when this problem ocurrs, acting as a manual fuel pump. If the problem now ceases to exist, then suspect the fuel pump."
 
Back
Top