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Have a 454 Crusader engine which is overheating a bit and
Have a 454 Crusader engine which is overheating a bit and blowing stream . When it reaches about 180 I drop rpm and stays around 160 . All liquid levels are fine . No milky oil . Checked impeller it's… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,504 satisfied customers
Have a 1981 260 Mercruiser with an overheating issue, has a
Have a 1981 260 Mercruiser with an overheating issue, has a new water pump, exhaust manifolds, new risers, new thermostat housing and and thermostat. Still overheats.Engine runs excellent!… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I just purchased a 1989 searay with a 4.3 L 175 hp v6 with
I just purchased a 1989 searay with a 4.3 L 175 hp v6 with alpha drive and it temp says it is 220 degrees I replaced the water pump in the outdrive, the sending unit and the thermostat and it still sa… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
Jason, I have 1987 Bayliner with 454 engines. It runs well
Jason, I have 1987 Bayliner with 454 engines. It runs well at normal speeds and engine temperature seem fine on both engines. However, when you go at full throttle at 2800 rpm there is a white/gray sm… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
(###) ###-####excellent running condition. Last week got a little
(###) ###-####excellent running condition. Last week got a little low in the anchoring spot and sucked up a ton of muk leaving the location. Ruined the starboard impeller so changed it. Boat runs exac… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
Horizon Mag 454 HO on a Sundancer 380/2000. Both engines have
Horizon Mag 454 HO on a Sundancer 380/2000. Both engines have about 310 hours. Port engine is steaming (white smoke). Water flow between port and starboard the same. Port Eng temp 1 degree lower than … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,504 satisfied customers
I have a Cummins 4BT diesel in my boat. After running 1 hr
I have a Cummins 4BT diesel in my boat. After running 1 hr at 2400 RPMs, noticed the temp climbing to 210 and suddenly the RPMs dropped. I pulled back on the throttle and the engine stalled. I let it … read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
454 mercruiser engine. What could cause white smoke, other
454 mercruiser engine. What could cause white smoke, other than a bad head gasket. I did a valve job on a friends boat. Sent heads out to machine shop. After completion engines ran fine. Several month… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
i have a volvo penta 3.0 gs marine engine that is building
i have a volvo penta 3.0 gs marine engine that is building alot of water pressure through out the cooling system has blown a ciculator pump hose . motor keeps a good temp at 150 degrees and thermostat… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 1987 wellcraft scarab with a 454 salt water cooled
I have a 1987 wellcraft scarab with a 454 salt water cooled it has an alpha 1 outdrive . I just put a rebuilt long block in with a compleat exhaust system and new intake manifold. It started right up … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I. have a 2001 searay 38 sundancer with approx 800 hours on
I. have a 2001 searay 38' sundancer with approx 800 hours on 8.1s horizon 370 hp engines the recent problem i have run into are 1-ther is approx 1 quart of anti freeze in bilge area, it appears to be … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got
I have a 1992 Sea Ray Sundancer with a 7.4L Mercruiser (got it 3 years ago) with fresh water cooling (heatexchanger). Since the time I bought the boat it has always needed to have a small amount of an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,504 satisfied customers
I have a 1988 Carver Montigue 25 Ft. with a 350 Chevy small
I have a 1988 Carver Montigue 25 Ft. with a 350 Chevy small block, 5.7 Mercruiser, Alpha 1 drive, fresh water cooled. I have discovered anti-freeze is low for unknown reasons. I have no apparent anti-… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have 1986 454 Crusaders, the right engine steams a small
I have 1986 454 Crusaders, the right engine steams a small bit at idle. I have installed new raw water pump,new exhaust manifolds, new 4" risers, new exhaust elbows,new oil cooler and had the heat exc… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
Twin inboard 454 crusader 7.4 XLs starboard engine seems to
Twin inboard 454 crusader 7.4 XL's starboard engine seems to put out more steam than the port engine. Nothing obviously overheating. Temps at the gauges 175. Any thoughts… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
Good morning I have a 1995 454 mercurser straight inboard,
Good morning I have a 1995 454 mercurser straight inboard, Fullly inclosed cooling system, I'm having a over heating problem, I have replaced the raw water pump, had the heat exchanger cored, replaced… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 3.7 merc and it started blowing smoke out the vent
I have a 3.7 merc and it started blowing smoke out the vent pipe seems to have lost some power what do you think is wrong?… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
merc 454 fresh water cooled not stern drive. total 750 hours
merc 454 fresh water cooled not stern drive. total 750 hours - less than 250 hours on manifold & risers replaced about 5 -6 years ago. boat run in salt water. haven't used it yet this year. couple wee… read more
gearheadII
gearheadII
Bachelor's Degree
138 satisfied customers
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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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