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Thread: Running out of gas????
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06-26-2011, 12:09 AM #1Junior Member
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Running out of gas????
New to the forums, looking at a neighbors 2005 Moomba Outback. D-drive, with the Holley 4-barrel carb....
Starts and idles fine, but whenever a load is put to the engine, as in accelerating in forward.... the engine stalls as if it ran out of gas.
When I look into the carb after a stall and work the throttle linkage, we're NOT getting the squirt of fuel into the venturi of the carb. If we let it sit a minute with the key "on", the electric fuel pump refills the float bowl and it will restart and run fine again.
This looked like a CLASSIC case of a partially plugged fuel filter, so we replaced the fuel filter between the tank and fuel pump, but the problem still persists..... and I'm out of ideas.... BTW, that fuel filter was an SOB to get to.... mounted to the rails, under the starter motor... a real PITA!!!! Is there perhaps another fuel filter that we're not aware of???
Has anyone experienced or heard of a similar problem??? And if so, what was the solution????
Thanks in advance,
Bill
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06-26-2011, 08:53 AM #2Senior Member
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Disconnect the fuel line from the carb and rent a fuel pressure guage. Then you can determine how well the pump is working. Also, I would check the float in the carb. The engine already sets at an angle, it is greater when the bow rises on take off.
My only 2 inputs.1997 MasterCraft 205
2008 Moomba Outback
1999 MasterCraft Sportstar OB
1992 MasterCraft 205
1999 Malibu Response LX
1987 Marlin Magnum Skier
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06-26-2011, 05:00 PM #3Senior Member
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I have the 07 Outback and my fuel filter is hidden behind a panel in the ski locker at the very back of the boat,maybe there is a 2ndary one back there as well.
07 Outback DD
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06-26-2011, 07:42 PM #4Senior Member
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The fuel pump should not run with the key in the on position. There is a fuel pump safety switch near the distributor that should only allow the pump to run when the engine is either cranking to try to start or running. The switch is actuated by oil pressure. This link will take you to a diagram of the fuel pump safety switch circuit.
ftp://ftp2.indmar.us/Wiring%20Diagra...y%20Switch.pdfLarry Engelbert
Indmar Marine Engines
"Power to the Sport"
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06-26-2011, 08:00 PM #5David
2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights
SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD
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06-26-2011, 10:06 PM #6Senior Member
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06-27-2011, 01:05 PM #7Junior Member
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Thank you for all of the replies!!!
I think our next course of action is to hook a DVM to the fuel pump leads and SEE if the fuel pump is getting 12 volts just before the engine stalls!!!
Thanks again!!!
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06-27-2011, 01:41 PM #8David
2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights
SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD
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06-28-2011, 02:29 AM #9
I'd check the float levels in the primary & secondary fuel bowls.
Maybe a stuck needle and seat?
Carb also might need a rebuild
Weak fuel pump pressure?
Loose connection on the fuel pump terminals'99 Outback (Maroon/Creme) GM 350/Holley 4150
550 HRS
LaSalle-Peru, IL
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06-28-2011, 11:11 AM #10
oil pressure switch
Same symptoms happened to me last summer and it was the oil pressure switch. Engine Nut and CanuckleHead helped me out on that repair, Thanks again guys! You saved my summer holidays!
2004 MOBIUS LSV
2008 Tacoma