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2007 Volvo Penta 8.1 GI-H Runs great up to 3/4 throttle -
2007 Volvo Penta 8.1 GI-HRuns great up to 3/4 throttle - approx 4500 rpm. Then it begins to pop (backfire?) and miss. New plugs (NGK 41-993). Compression test was 175/180 across all cylinders. Verifie… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I'm buying a Carver 356 with Volvo Penta 8.1 Gi engines.
I'm buying a Carver 356 with Volvo Penta 8.1 Gi engines. During the sea trial the engines would not run above 3000 rpm. They ran rough and I was not at all satisfied with the performance. The salesman… read more
Yachtwork
Yachtwork
Owner Team Yachtwork
Technical or Trade School
2,574 satisfied customers
Thank you. I have 8.1 GI-F volvo penta. how may I check the
I have 8.1 GI-F volvo penta. how may I check the coolant level? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I have a Volvo 8.1 recently new (2 yr old) that is
I have a Volvo 8.1 recently new (2 yr old) that is overheating-- I replaced the sea water pump- ran water thru the top of the heat exchanger and discharge out the bottom seemingly freely, Still overhe… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I have a Volvo penta 8.1 Gi in a 2005 Cobalt 250. The boat
I have a Volvo penta 8.1 Gi in a 2005 Cobalt 250. The boat sat idle for a couple of years and then the previous owner let the engine freeze a couple of years ago. a rebuilt engine went in and has abou… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I changed the oil and filters on my Volvo 8.1 GIs on April
I changed the oil and filters on my Volvo 8.1 GIs on April 10th. I ran the engines after changing the oil but didn't take the boat out. On May 31st I filled gas and took the boat out. Only 10 minutes … read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,396 satisfied customers
I have a 1985 tamd 40b Volvo penta diesel it is fresh water
I have a 1985 tamd 40b Volvo penta diesel it is fresh water cooled when I run the boat at 2800 rpm stays cool but when I go to3200 where the boat runs right she starts to rise in temp then if I drop b… read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 satisfied customers
Hard Engine Knock in Volvo Penta 8.1 I have a hard knocking
Hard Engine Knock in Volvo Penta 8.1 I have a hard knocking sound that is present immediatly on start up and increases as the engine revs increase. This occurs irrespcetive of whether it is in or out … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I have twin Volvo Penta 5.7 L GXI A s. Last evening on a
I have twin Volvo Penta 5.7 L GXI A 's. Last evening on a cruise, i could not get more 3000 rpm on the port engine and it was running rough. Back at the dock, at rpm over 2500 it would "bark' and run … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I purchased a 2007 Chapparral 276 SSx with Volvo 8.1 L GI 1.78
I purchased a 2007 Chapparral 276 SSx with Volvo 8.1 L GI 1.78 -DP (375 HP) w 6 inch Riser with 93 hours. On Sea Trial at speed approx. 3000 rpm the over heat alarm went off. The salesman took the boa… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Hi, I just bought a 2001 boat with a twin volvo penta 5.7L
Hi, I just bought a 2001 boat with a twin volvo penta 5.7L GI. the engines seem running rough and misfire at low rpms. Spark plugs were changed recently by the previous owner with a feeler gap of 0.04… read more
Rick Gay
Rick Gay
High School or GED
106 satisfied customers
I am contemplating buying a Bayliner 45ft boat with a pair
I am contemplating buying a Bayliner 45ft boat with a pair of marinised Hino 225hp engines. What kind of fuel burn figures in terms of litres per hour could I expect at say 1500 rpm 2000rpm and 2500 r… read more
Noel Schembri
Noel Schembri
Marine Mechanic
Diploma
2,759 satisfied customers
I just purchased a 2005 26 chaparral with 8.1 volvo penta
I just purchased a 2005 26' chaparral with 8.1 volvo penta engine, prior owner is a personal friend and has had zero problems with engine. We are having issues with temperature, once we get to cruisin… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I am about to purchase a boat with Volvo Penta KAD 300. When
I am about to purchase a boat with Volvo Penta KAD 300. When testing the boat at 25 kts the RPM is varying(jogging) between 2700 and 3100. At 28 kts it Runa fine, at 20 kts it Runa fine. At 33 kts it … read more
Greg Robinson
Greg Robinson
Senior service manager
Vocational, Technical or Trade Scho
199 satisfied customers
I have a 5.7 Gi engine in an Albemarle 247 that wont run above
I have a 5.7 Gi engine in an Albemarle 247 that won't run above 2500 rpm before dropping back to idle. Owners manual states two sensors monitor Manifold Ambient Pressure and Engine Knock. How does one… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,804 satisfied customers
I have a volvo penta 5.7 Gi in my Four Winns 268 vista cruiser.
I have a volvo penta 5.7 Gi in my Four Winns 268 vista cruiser. Started first time everytime for last four years, over the last few days it required two or three times cranking it over to start. Yeste… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
Ive purchased a 2003 Pursuit Denali 2665 powered by a Volvo
I've purchased a 2003 Pursuit Denali 2665 powered by a Volvo Penta 8.1 GI CF w/duoprop system. Occasionally when I first start the engine the boat will shake port to stbd pretty hard. If I shut it dow… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have been told my boat is in power reduction, because it
I have been told my boat is in power reduction, because it will not go any higher than 3000rpm, I have researched and read blogs and found a reset tool t but cannot find anyone that has it for sell or… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 satisfied customers
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Tan

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Jeff G.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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