Volvo Penta Engine hesitates/misses

lwoody

Recruit
Joined
Jul 29, 2007
Messages
1
HI all, I'm new to the forum but like the idea. I have a 97 Glastron 195 w/5.8 Volvo Penta sx. While operating under load, 2500-3000 RPM's the engine will hesitate or miss. Somtimes it dies altogether, but it will start right back up. It never dies it at idle. I have checked/changed fuel filter/water separtor. No signs of water! After it quitting under medium throttle the engine was hydrauliced. I removed plugs, change oil, etc. I replace the coil and then ran engine under load, 2500 RPM's (on trailor) for approx 20 minutes - no problem. I then ran the boat another 10-15 minutes in close proximity of the dock - no problem. The next time out, you guessed it, after about 20-30 minutes it began hesitating, or missing. I did make it back. I have ran the boat approx 30 minutes, under load (2500 RPM's) on trailer but it will not repeat the problem. I notice coil voltage is approx 2 volts lower then battery voltage. I replace solinoid/switch but new one does the same. It appears to have built in resistance. Battery volts is about 13.5 with engine running, but coil voltage will vary from 10.5 to 12. I never noticed the voltage doing this before and I watch gages closely. I think it may be connected but I don't know for sure. Beside that the missing/hesitating is a problem, I am afraid I will be stranded again. Any help will be appreciated.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,993
Re: Volvo Penta Engine hesitates/misses

Ayuh,.......

It sounds like Fuel Starvation,.......

Btw,......Running the motor, while the boat is on the trailer,........
Is Not running it "Under Load"...........
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Volvo Penta Engine hesitates/misses

Btw,......Running the motor, while the boat is on the trailer,........
Is Not running it "Under Load"...........

That would be "In Gear" maybe, but not under load. Under load would be in the water water and moving and not tied to a dock.

A full tuneup including a carb adjustment may cure your problem.
 

BlackPelican

Recruit
Joined
Aug 5, 2007
Messages
1
Re: Volvo Penta Engine hesitates/misses

I have experienced a similar problem.

I was chasing a multi dimensional engine performance problem that lead me to replaced the fuel pump, carb, and the electronics. I ended up with a problem that sounds exactly like what you are experiencing. I finally checked the plugs again, even though they had resently been replaced. That was the problem. Things are good now.

Good Luck
Black Pelican
 
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