Volvo Penta 5.0 osi engine cranks but won't start

Joined
Aug 17, 2006
Messages
20
Greetings all,
Looking for a few steps to troubleshoot an "engine won't start" issue. I have a Monterey with dual 2006 Volvo Penta 5.0 osi's. These engines are fuel injected, I believe GM throttle body. Starboard engine starts. Port engine doesn't start. The boat was sitting for about a year so I ran the motors with fresh gas from one of those 5 gal outboard tanks. I have verified the engine is producing spark. Checked the compression a while back and it was good. I removed the flame arrestor from the throttle body and sprayed starting fluid in it and the engine runs for 3 seconds and cuts off as expected. Seems that the engine isn't receiving fuel. I am new to the boat and noticed the starboard fuel pump assembly was changed so I changed the port fuel pump assembly so I believe it's all good but did not solve the problem. The fuel pump runs for 5 seconds or so when I press the ignition button. I was wandering what I should do next? I didn't check the the fuel regulator but I will do this next. I don't have a noid light but I can purchase one if this is a useful test. I did give the fuses in the junction box a slight check but could pull each and give it a detailed check. I read that it could be an ECU issue perhaps not having a good ground, I don't know if there is an easy way to verify this? I guess the noid light test will verify the ECU is working properly. Any assistance with this would be greatly appreciated. Thanks in advance.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,349
Could use a motor serial number, but start by measuring the fuel pressure at the rail. There is a cap covering the schrader valve and should get 50 to 60 psi when ignition is turned ON.

No need for a noid light since it does start with starting fluid

Do check the fuses closely. Could measure across them with an ohm meter
 
Joined
Aug 17, 2006
Messages
20
Thanks for your response. The engine model numbers are 4012181485, 4012181486 for port and starboard engines. I misspoke since the engine is multiport injection. I will measure the fuel pressure at the rail this weekend. I will also measure the fuses with an ohm meter.
 
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