Bogging down

Rinker85

Petty Officer 2nd Class
Joined
Aug 29, 2010
Messages
192
I have a 1984 2.5 L Omc I/O. The boat ran fine for 2 hours then all of a sudden at high speeds only the engine started bogging down. It did the same thing 1 time last fall. At that time I changed the fuel flitter and did not have any problems until today. The boat did sit for 7 weeks with a 3/4 full tank of gas. While it was happening I noticed the voltmeter only reading 11 volts. I put a load on the system by adjusting the trim and the bogging down got worse. Any Ideas where to start diagnosing?
 

southkogs

Moderator
Staff member
Joined
Jul 7, 2010
Messages
14,779
.... I'm crumby at diagnostics, but based on the electrical stuff I'd test the alternator and voltage regulator for starters.
 

Rinker85

Petty Officer 2nd Class
Joined
Aug 29, 2010
Messages
192
I started thinking about how long the boat sat with 3/4 of a tank of gas and the Ethanol problems containing water. Should I install a fuel water separator?
 

southkogs

Moderator
Staff member
Joined
Jul 7, 2010
Messages
14,779
I would think you can decide on that after you solve the problem. I actually don't have one on my boat right now since I had to replace my fuel pump.
 
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