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Volvo Penta 1997 43 stalling issue

D

dkretsinger

New member
"I am working on a 1997 17&#39

"I am working on a 1997 17' Larson Flyer with a Volvo 4.3 Liter PJX jet drive. I installed a rebuilt Jasper engine for a friend because the boat was not winterized properly.
I replaced: Cap, rotor, wires, plugs, fuel in tank, fuel filter, all gaskets, thermostat, fuel pump, fuel pump relay, and rebuilt the carb.
I set the timing 8 degrees btdc.
The engine runs great when it is cold for about 30 minutes then it dies. It will restart after pumping the gas a few times and a couple cranks; run for about a minute and die again. I have tried this several times and it does the same thing over and over again. I am about to purchase a new coil to see if that helps. My other thought is that there is still water in the fuel. I checked with the marine dealer and they cannot figure this out either. Does anyone have any other ideas as to what this could be? I am getting very frustrated with this thing, so any help would be greatly appreciated! Thanks in advance!

Dan"
 
There should be an oil pressur

There should be an oil pressure switch in the fuel pump electrical system. It sounds like the engine warms up and the oil pressure drops enough to trip the switch. The switch may be bad. If you bypass the switch and the engine runs well look at a new switch. Also put a mechanical direct reading guage on the engine temporarily to test the oil pressure.
 
"Excellent reply, boatrep! Th

"Excellent reply, boatrep! That might be the problem.

Suggest you run it 'til it dies, then pump the accelerator pump and see if the carb is empty. Don't try to restart it before you do this.

Jeff"
 
"Hey Guys,

Thank you both f

"Hey Guys,

Thank you both for the great ideas, I really appreciate your help!
Boatrep –
Is that switch on the fuel pump assy. itself and what does it look like? I do not recall seeing anything else on that assy. My oil pressure on the dash reads 60 psi at idle and 80 psi at higher rpms. Would you still recommend the direct oil pressure gauge?
Jeff –
On one of my outings after the engine stalled I removed the flame arrester and activated the accelerator pump with the throttle arm. There was a lot of fuel spraying from the jets, so I think the fuel delivery side of things is okay.

Tomorrow I am going to take a five-gallon can of fuel and bypass the boat’s fuel tank to rule out any contaminants in the tank. If it still dies out, I will see if I can figure out how to bypass that oil pressure switch (if I can find it) while out on the water. Again, thanks for all your help and keep sending the ideas! --I will keep you up to speed on what I find out tomorrow.--

Dan-"
 
"If there was gas coming out t

"If there was gas coming out the accelerator pump AFTER it died, then that's not the problem. Next time it dies--that's the only way to solve ~#&!%% problems like this--pull the coil wire from the distributor. Aim it at the manifold and crank it over to see if there's a nice, 3/4 inch blue spark. If not, the coil or module (if so equipped) could be bad.

Jeff

PS: The fuel pump switch is in the oil pressure circuit, not at the pump. It's what triggers "idiot lights" in a car."
 
"Hey Jeff,

Thanks for all t

"Hey Jeff,

Thanks for all the information. I had the boat out on the river on Sunday. The engine acted up again, so we did some diagnostics out on the water. I checked the accelerator pump again to see if it was getting gas, turns out that it was not. I pumped it a few more times than I did on our last outing and it dried up after four pumps. We removed the carb and went through it. Everything was working, as it should. We then jumped the wiring harness at the fuel pump relay and tried it again. The boat ran great for 2 hours before we went in for the evening. I am not very good at wiring, so I brought it into the marina to see if they could figure it out. Again, thank you all for your help on this topic.

Dan"
 
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