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I have a 4-stroke Yamaha 100hp motor that operates a 25 ft
I have a 4-stroke Yamaha 100hp motor that operates a 25 ft Sanpan pontoon. Just recently had the spark plugs and oil changed.Last evening we were out on the boat and when we started it up white smokes… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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After buying new yanmar 6lp stp2's in 2011 they ran well
hi james.. after buying new yanmar 6lp stp2's in 2011 they ran well (other than turbo exhaust bend fatigue) until august last year when upon realising that exhaust smoke had entered the engine I ended… read more
Jason
Jason
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i am considering buying a 1969 Chris Craft Commander with twin
i am considering buying a 1969 Chris Craft Commander with twin 8v53 Detroit Engines. They have about 3200 houurs on them. The port engine smokes when fired up, even after about 15 minutes but the star… read more
Jason
Jason
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I have a Yanmar 2GM20F powering my sailboat. I have been having
I have a Yanmar 2GM20F powering my sailboat. I have been having an overheating issues during the last season, where the coolant was being pushed out, via the the overflow. After verifying that the imp… read more
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I have a 1996 Four Winns 238 Vista that is leaking water in
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Malta Tech
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High School or GED
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I have a Kanzaki KBW20 transmission that is leaking ATF. Inspecting
I have a Kanzaki KBW20 transmission that is leaking ATF. Inspecting the engine compartment, as it's in a sailboat and tight quartered, I've not ID'd the location of the leak. Any one who may know this… read more
Tan
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Hello, I am Bob and I have a 2002 Sunseeker Camargue 44 with
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Jason
Jason
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I have a 27 sail boat that was repowered with a Yanmar 2 cylinder
I have a 27' sail boat that was repowered with a Yanmar 2 cylinder diesel #2GM20 about 6 years ago . The motor has only about 200 hours on it. Up until now it has been running great. A few weekends ag… read more
James
James
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Vocational, Technical or Trade Scho
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I was on a boat with a Yanmar 4JH4TE 75 Hp engine. We needed
I was on a boat with a Yanmar 4JH4TE 75 Hp engine. We needed to adjust the anchor. I started the engine with the key but by mistake turned the key to the off position with the engine still running, bu… read more
Jason
Jason
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I dont have the model # XXXXX me but it is on a 1986 hunter
I don't have the model # XXXXX me but it is on a 1986 hunter sailboat . Fifteen hp engine. Last night comming in from a night sail, noticed smoke comming from exaust or back of boat. It possably came … read more
Scott
Scott
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I have a Yanmar 1GM single single diesel on my small sailboat. I
I have a Yanmar 1GM single single diesel on my small sailboat. I was motoring when I heard a small pop from the engine, saw black smoke from the exhaust, and felt the engine getting erratic. I immedia… read more
Jason
Jason
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Hi-- I have a question regarding an 86 Yanmar 2GM20F
Hi-- I have a question regarding an 86 Yanmar 2GM20F on a Pearson 28-2. It has been well maintained, serviced, etc. We ran it for 3 hours 5 weeks ago, started, cruised fine. Today I could not get it t… read more
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Jason
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I have a 3 cylinder diesel engine in my sailboat and it is
I have a 3 cylinder diesel engine in my sailboat and it is spewing lots and lots of black smoke out the exhaust--it covers the back end of the boat in black soot. Here's the history: Rebuilt engine in… read more
Yachtwork
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Technical or Trade School
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We have a yanmar diesel in a hunter 35.5 sailboat. After
We have a yanmar diesel in a hunter 35.5 sailboat. After launch in May, the boat sat overnight with 3 feet of water in the cabin. The engine was ok ( I hand cranked to make sure no water was in the cy… read more
Mechman45
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I have a Yanmar diesel 2GM20F in my 1991 Hunter sailboat. I
I have a Yanmar diesel 2GM20F in my 1991 Hunter sailboat. I can't get the RPM over 2K no matter how much throttle I apply. When I apply more throttle, oil appears in the water exhaust.… read more
Michael
Michael
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Two boating friends have had the dry exhaust elbow fail on
Two boating friends have had the dry exhaust elbow fail on 315 HP Yanmar diesels. Both failures resulted in a completely severed exhaust elbow. Talk around the marina is that these elbows (after the t… read more
John B
John B
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I have a 2003 Rinker Captiva 5.0 Bravo III. Took boat out and
I have a 2003 Rinker Captiva 5.0 Bravo III. Took boat out and smell fuel and started seeing white smoke. I headed back to the marina, when powering up boat splutterd so I had to creek back. gauges sho… read more
Captain Dave
Captain Dave
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I have a Yanmar diesel in my sailboat and when I increase the
I have a Yanmar diesel in my sailboat and when I increase the boat speed past 4 knots I start to get both black and white smoke from the exhaust. I have checked the cooling intake filter and it is cle… read more
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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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