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Old 17-05-2012, 06:46   #1
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Join Date: Dec 2011
Location: nw austraila
Boat: fp bleize 43
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yamaha 3jh4ce

hi hope some one can help me with some advice.
i am in the process of buying a second hand catamaran with a pair of 3jh4ce and saildrives.
motors have done about 450 hours . the broker has had a service and per purchase inspection done and all sounds good.
but the wide open throttel max revs was 2800 in netural and 2600 in gear with a boat speed of aprox 8 knots.
he tells me this is in spec.
i under stand they should do 3000 rpm can you please tell me if its ok or a problem.

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Old 17-05-2012, 06:52   #2
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Re: yamaha 3jh4ce

I'm sure you mean yanmar. You are going to buy subject to survey, right? And part of the survey should be a thorough survey and sea trial of the boat and engines. At least here in the US, it is never acceptable to rely on the word of a broker.
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Old 17-05-2012, 07:07   #3
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Location: Belo Horizonte, Brazil
Boat: Farr 46
Posts: 124
Re: yamaha 3jh4ce

Yanmar specs require that the engine reaches full revs (3000 rpm) in gear, so there is a problem - either not getting full travel on throttle cable or over-propped.
Can verify this with Yanmar Australia,
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