Peter DeGroote
Cadet
- Joined
- Jun 13, 2014
- Messages
- 13
Hello,
I have 1990 Glastron Sierra 175 bowrider with a 3.0L Volvo Penta AQ131C. I bought it 4 years ago and it ran great, it sat for the next summer as I was too busy with a newborn. Last summer I took it to a backyard marine mechanic who gave it a tuneup and got it running. When I first got it into the water it was not running great but after a tank or two of gas it was running good again.
Where it did lack was the upper end of the throttle. If there was only one or two people in the boat it could easily get up on plane and would be able to really get up to speed. But if there were 2-3 adults and a few young children it would never be able to get up on plane. The tach would just sit at about 3000rpm and not going any further. I tried changing the inline fuel filter and the spark plugs but it didn't make a difference. I just left it because we rarely had that many people in it and it ran ok otherwise.
It took me a bit of time to get around to tinkering with it this year due to COVID-19. I took off the carb and gave it a good cleaning and made sure the old gas was out of it. I changed the oil and filter for the first time since I've owned it. I was able to get it to run in the driveway on a hose just fine, it had a nice idle but would die if I tried raising throttle. I finally got it in the water and it started great and was fine as I start raising throttle but after about 1/4 throttle the engine starts getting loud and the boat just bogs down. I notice the oil pressure gets pretty high too. If I lower the throttle to 2500rpms its nice and smooth and things are good. Anything from 3000rpm and up the engine gets loud and there's no increase in power. Last time I was out and was doing this at 3000rpms I looked at the fuel filter and there wasn't much fuel visible.
Is this a bad fuel pump? Any other ideas?
Thanks in advance
Pete
I have 1990 Glastron Sierra 175 bowrider with a 3.0L Volvo Penta AQ131C. I bought it 4 years ago and it ran great, it sat for the next summer as I was too busy with a newborn. Last summer I took it to a backyard marine mechanic who gave it a tuneup and got it running. When I first got it into the water it was not running great but after a tank or two of gas it was running good again.
Where it did lack was the upper end of the throttle. If there was only one or two people in the boat it could easily get up on plane and would be able to really get up to speed. But if there were 2-3 adults and a few young children it would never be able to get up on plane. The tach would just sit at about 3000rpm and not going any further. I tried changing the inline fuel filter and the spark plugs but it didn't make a difference. I just left it because we rarely had that many people in it and it ran ok otherwise.
It took me a bit of time to get around to tinkering with it this year due to COVID-19. I took off the carb and gave it a good cleaning and made sure the old gas was out of it. I changed the oil and filter for the first time since I've owned it. I was able to get it to run in the driveway on a hose just fine, it had a nice idle but would die if I tried raising throttle. I finally got it in the water and it started great and was fine as I start raising throttle but after about 1/4 throttle the engine starts getting loud and the boat just bogs down. I notice the oil pressure gets pretty high too. If I lower the throttle to 2500rpms its nice and smooth and things are good. Anything from 3000rpm and up the engine gets loud and there's no increase in power. Last time I was out and was doing this at 3000rpms I looked at the fuel filter and there wasn't much fuel visible.
Is this a bad fuel pump? Any other ideas?
Thanks in advance
Pete
