Sailboat Owners Forums » Yanmar
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The Sailboat Owners Forums is where individuals can discuss all Yanmar machinery. Ask questions and get to know how to solve Yanmar Antifreeze Pump Bearing Problems, Transmission Noise while idle, and get to know how to fix other engine-related issues. Learn about maintenance and how to solve black smoke releases, oil leaks, and more.
Sailboat Owners Forums » Yanmar
1M ago
Hello, I would like to change my saildrive propeller due to some damages on the old one. I came across the flexofold propeller and was wondering if I should be this one or not. Does anyone have some experience with this company? And does anybody know the gear ratio of the Yanmar 4JH4TE SD ..read more
Sailboat Owners Forums » Yanmar
1y ago
Hello everyone. First post here, by recommendation from a bud at the club I'm in. My boat has a Yanmar YSM12R engine. The other day after a surprising blow along the river, the neck connecting the mixing elbow to the engine snapped - images included: The boat used to be an ocean boat so it ..read more
Sailboat Owners Forums » Yanmar
1y ago
I bought my 1990 Hunter 28 ten years ago last month, and during that time I never had hot water that came from the heat of the engine because the valve next to the heater had meet turned off. I opened it and of course it started leaking so I replaced it and I now have hot water. That was two ..read more
Sailboat Owners Forums » Yanmar
1y ago
I have a 1997 Yanmar 3JH2-T(B)E turbo motor in my Freedom 40/40 and when I start it up, the oil pressure is low, but when I start motoring, it climbs to normal levels. Then after about 20-30 minutes, the pressure starts dropping to levels lower than I would like to see it. Quite often I can ..read more
Sailboat Owners Forums » Yanmar
1y ago
My boat has been sitting for about 2 months. I went to run the Yanmar 3GM30 tonight and this is what happened. Starts fine, idles and runs great when not in gear up to 3,000 rpm. In gear, piles of black smoke and won't run more than 2,000 with almost no forward propulsion. Fuel looks good. New ..read more
Sailboat Owners Forums » Yanmar
1y ago
Hi, Does anyone know the part number for the raw water cooling hose. The parts catalog says 128291-49020 but no drawings to confirm. Couldn’t find any pictures on vendors web site neither. Thanks ..read more
Sailboat Owners Forums » Yanmar
1y ago
On my last two 8-10 hour passages when I started heading in to the dock I noticed the engine RPMs took 10 or more seconds to respond to lever commands. Even more so for reverse than forward. Made for a dicey docking evolution. While running, the engine goes into reverse or forward immediately, I ..read more
Sailboat Owners Forums » Yanmar
1y ago
In attempting to remove some excess oil from our Yanmar 3YM30 through the dip stick hole, I was unable to get very much out. I tried several times and chalked it up to the cold engine and/or ineffective pump. However, when reading the manual for the 3YM30, it specifically states that the oil ..read more
Sailboat Owners Forums » Yanmar
1y ago
I have heard that I should flush out my Yanmar 1gm10 inboard diesel engine every time I run it in saltwater. Is that true? Is there an easier way to flush it, because it currently takes me about 20 minutes after each time I motor which is a pain ..read more
Sailboat Owners Forums » Yanmar
1y ago
Hey, I have a Yanmar 3gm in my Hughes 36. At idle, I can rev the engine right up to 3000rpm with no abnormal vibration. The same can be said for when the boat is in reverse. However, when I shift into forward I can only get up to around 1100rpm before I notice significant vibration and engine ..read more