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Old 05-08-2014, 16:35   #1
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running RPM

I have a 46 foot sailboat with a new 75 HP turbo yanmar. What RPM should I run it at? How high can I go? The tach only goes to 5000. Thanks

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Old 05-08-2014, 16:45   #2
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Re: running RPM

Surely it won't turn 5000?

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Old 05-08-2014, 17:42   #3
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Re: running RPM

Find the Yanmar manual on the boat
If not, you can download one for your specific engine (model number should be on engine plate) - multiple sources.
It will tell you Max RPM & give running + care instructions

Rule of thumb - 80% of max is a good max to all day @ that level....although you can improve (even more) fuel efficiency by dropping it even further.

Turbos need a little extra care (cool down & "blow Out" every now & then) - sure owners will chime in

5000 - just a dial face number

Enjoy the new yacht
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Old 05-08-2014, 17:47   #4
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Re: running RPM

If it is the 4JH3-TE, it is rated at max 75 hp aat 3800 rpm, and continuous operation of 69 hp at 3700 rpm. But it will last a lot longer at 2800-3000 rpm cruising speed. You can download PDF manuals for just about everything at the Yanmar website.
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