SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: pahrnic on May 29, 2012, 10:24:23 AM
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Hello fellow jet boaters!! Lemme just say it was a great weeekend down at lower river, SIN CITY sand bar was going OFFF on Sunday.
Anyway i have a slight problem and need some help. So my boat runs great when its in the RPM range 1-4 but when i wanna get on it it holds its R's at 5 for about a good 10-15 seconds then drops all the way down to 3? Like is is starving fro fuel? Secondary isnt opening up? i have no idea. The boat doesnt die but it cant stayed full throttle for longer than 15 seconds.
I had 2 POS fuel regulators bust open on me and gas wend everywhere, so i am running straight to the carb. O yea i have a holley 750 carb.
What PSI should my carb be running at? Please anybody have any suggustions? I think it is just starving for fuel. Either than that the boat runs great!
Cheers
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I run my fuel pumps around 10-14 but you can flow 3gph at that psi or 55 gallons at that psi. Sounds like your sucking it dry and not gettin enough gas. Check your float levels or get a higher rated fuel pump
Fat fingered from the phone- Corey
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i run mine at 9psi. holley recommends 7 1/2 psi max.
take a peek at the float levels and why your bowls might be emptying on hard acceleration.
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If your fuel pressure is fine and this is a new problem change your fuel filters. It could be the small stone like ones in your carb where your fuel line goes in. Sounds like the secondary side might be a little clogged.
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Thanks guys will do some checking on the floats and see what the problem is.
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I had a similar problem, it turned out to be my distributor cap had come loose and was losing spark