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1991 125hp Mariner oil injected wonbt start at times

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newtoit

New member
"New member
Username: newtoit

"New member
Username: newtoit

Post Number: 1
Registered: 08-2009
Posted on Monday, August 31, 2009 - 02:37 pm:

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I have recently purchased a bass boat with 1991 125hp Mariner, 4 cylinder (I believe), oil injected. We took the boat out the weekend after we purchased it and it ran fine. We motored to a few spots and used trolling motor, seperate batteries. We motored to a spot and sat for about an hour. When we tried to crank the motor back up it would not fire. I don't think it was the battery. Every thing else tied to the battery was working fine and we could hear the motor turning but it would not fire. After sitting for a little bit longer it finaly did fire and got us to the "no wake" and when we put it in neutral it died again. We could not get the motor started again. The boat was out the next weekend and no problems. This weekend we ran into the same problem. A buddy recomended (with the motor off) opening and closing the throttle a couple times and it fired up.

We are thinking now that it must be the fuel line and or pump. Any thoughts / advice would be appreciated"
 
"If it was sitting for a while

"If it was sitting for a while before you bought it, it could have some "cooties" in the fuel system.

Anything from a clogged filter to clogs in the low speed (idle jets) of the carb(s). It could also be a bad fuel pump diaphram.

Since it's running but just a little snarky about it you could try running some SeaFoam with the gas - that certainly won't hurt. You may also want to throw in a new set of sparkplugs - again, can't hurt and could be the cause of some of your problems.

Next time the motor dies when idling, try pumping the fuel bulb - if that keeps her running, the fuel pump is on it's way out.

Ultimately, you may have to have the carbs pulled and cleaned, but try the easy stuff first.."
 
Thank you for your response.

Thank you for your response. It was sitting for a couple months before we purchased it. I will try the SeaFoam and spark plugs. Thanks again for your time.
 
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