Volvo Penta 5.7L Gi-E - overspeed alarm issue??

[IllinoisRiverBoater]

I have a 2005 Volvo Penta 5.7l Gi-E, DP-S duo prop on a 232 Rinker Captiva. Lately I have been experiencing the audio alarm going off when the boat is near wide open throttle, or up around 4500 or so rpms. The alarm will go off, but it stops as soon as I bring the boat down off of plane. I put the boat back on plane and open her up, then it will go off again. The boat appears to be operating very efficiently. It has good oil pressure (on both gauge, and when I check the dipstick); and there appears to be no overheating/water temperature issues.

I am suspecting that there is a problem with the engine overspeed alarm because last time the alarm went off I was watching the tachometer and have noticed that the needle will sometimes swing wildly in either direction. Also, the needle on the tach will swing when the boat is sitting at idle speed and not in gear, so I'm ruling out any gear/propeller issue. Basically the only time the alarm goes off is when i'm at upwards of 4000-4500 rpms. Again, the boat appears to be running very well...no vibrations, missing, ...etc. This is an annoyance because it is preventing me from travelling very far up and down the river due to having to stop the boat every few minutes to deal with the alarm. There appears to be no problem when I keep the rpms down under 4000.

Where do I start in trying to correct this problem? What do I check? Could a bad gauge be the problem? Bad sender or sensor? Any suggestions would be appreciated before I turn it over to marine mechanics and dole out $$$$$!!!!!

 

[mia248vista]

Re: Volvo Penta 5.7L Gi-E - overspeed alarm issue??

Lately I have been experiencing the audio alarm going off when the boat is near wide open throttle, or up around 4500 or so rpms. The alarm will go off, but it stops as soon as I bring the boat down off of plane.

Is it a steady alarm or beeping?

 

[IllinoisRiverBoater]

Re: Volvo Penta 5.7L Gi-E - overspeed alarm issue??

Mia - alarm is steady at first and the engine interuptor (protection mode) will kick in if I don't bring the boat down to idle speed. Once boat comes down off of plane it beeps a few times, then stops. Temp gauge is normal. I've blown an impeller before twice and know what happens if overheating were occuring. Oil gauge is fine. Plenty of oil in the engine per dipstick check.

 

[mia248vista]

Re: Volvo Penta 5.7L Gi-E - overspeed alarm issue??

Ok in my case I just get a 2 beeps, pause, 2 beeps pause.

 

[IllinoisRiverBoater]

Re: Volvo Penta 5.7L Gi-E - overspeed alarm issue??

There is no oil resevoir bottle on my Volvo DP-S. The Volvo mech at the dealer where I bought the boat told me over the phone that on the DP-S there is no monitor system that would activate the alarm on that model. If it were a Merc, there would be a bottle resevoir in the engine compartment that could be checked. Because of this I've pretty much ruled out the drive oil being the cause.

I was also told by my dealer that the only way to diagnose the problem and truly find out what is causing the alarm to go off is to plug a Volvo electronics tool into the ECM and see what kind of code comes up. He might be able to do this later in the week he says. My dealer is over an hour away and I dont' want to drag the boat down there. He's supposed to be coming to my marina to deal with another Rinker later in the week so hopefully he will have time to look at mine. Meantime, Ive just been making 5 minute trips to the nearest beach and back! lol

 

[mia248vista]

Re: Volvo Penta 5.7L Gi-E - overspeed alarm issue??

Illinois,

Have you been able to make any progress on this issue?