Strange Problem! Any Ideas?
01-04-2013 | 12:49 PM
#11
Fast Singles Club
Joined: Oct 2011
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From: Raystown Lake , Pa.
I have a wierd problem restarting my Starboard engine when it's hot. I have 500 HP's with B&M Blowers and upgraded mechanical fuel pumps. Port engine will always refire but the Starboard will not. When cold at the begining of the day both motors fire right up. After running for any length of time when shut done the Starboard motor is starved for fuel and will not start. Here's what I have done so far. New fuel pump, rebuilt carb, new fuel filter, replaced fuel lines and basicaly checked the integrity of the entire fuel system. All this to no avail, same problem still exists. Almost like a vapor lock of some sort. Any ideas on what the problem could be? What should I do next?
Last edited by the deep; 01-04-2013 at 12:56 PM.
01-04-2013 | 01:38 PM
#12
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From: On a Boat
Is the boat rigged with a single PU per engine, or a common PU for both engines?
Have seen Fountains installed fuel line from tank to ball valve collapse internally... only when bilge warmed up. The line looks good but has failed internally.
Have seen Fountains installed fuel line from tank to ball valve collapse internally... only when bilge warmed up. The line looks good but has failed internally.
01-04-2013 | 02:53 PM
#13
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Ok, Thanks guys for the ideas. I will start in the tank and work my way to the carb again with a fine tooth comb. You're right it is probably something simple that I have overlooked. My buddy is going to come over and help me this weekend. Maybe a new set of eyes will see something I didn't. I'll let you all know what we find. Thanks again.
01-04-2013 | 03:33 PM
#14
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From: Cheboygan, MI
Make sure you don't have an inner liner of a fuel line collapsing once it warms up. I bought a 98 that had been sitting in someones garage and was like brand new except all the fuel lines were shot. I ended up re-plumbing everything.
01-06-2013 | 07:37 AM
#16
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From: westville, NJ
take a piece of clear hose and a gas can. as soon as motor won't start, swap fuel line ti clear hose and crank motor. if it pulls fuel up and fires motor, it is definately pre-pump problem. if it doesn't pull fuel, it is farther downstream...needless to say, don't go driving the boat around with this jury-rigged system...
01-06-2013 | 10:18 AM
#18
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From: yorkville,il
in the op,you stated that when the engine is hot it wont start,now you say it wll start and run until the fuel bowls run dry,2 different scenarios,please clarify exactly what happens when the engine gets hot after a hard run.
01-06-2013 | 10:25 AM
#19
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From: yorkville,il
in post 1 he said he replaced the fuel pump,so i think he has eliminated the pump as the problem still exists.
Last edited by mike tkach; 01-06-2013 at 10:34 AM.
01-06-2013 | 11:58 AM
#20
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From: Omaha/LOTO
Also, when re reading, he said its fine when its cold, so the fuel pump is probably not the issue.
It sounds like the fuel is evaporating in the lines and causing a vapor lock type condition.
