Fuel Pump Problem 1991 200hp merc XRI 2.5L

Water walker

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Jan 15, 2009
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I have a 1991 200hp MERC XRI 2.5L after driving 15-30 mins at 45 mph, I let off throttle to slow down boat, engine shuts/runs down. I check fuel line schrader valve and no fuel I can squeeze bulb till it gets hard and it will start as long as I get up to speed it runs but, when I get to idle it seems to run down and turn off and I'll check fuel again and no fuel in fuel-line schrader valve. I have to squeeze bulb again. do I have a bad fuel pump? I beleive its an electric fuel pump you can hear it normally when you turn key on, But I noticed that when it stops I don't hear the pump run?
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,620
Re: Fuel Pump Problem 1991 200hp merc XRI 2.5L

It sounds as if the fuel pump diaphram is bad on block mounted fuel pump. When you at slow speed it is not supplying enough fuel to vst tank but is working on higher rpm. Install a kit in it and should be ok, and replace the check valves with kit!!
 

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