[C320-list] Max RPM on Yanmar YM30

[Robert Seastream]

Year 2002 hull 906 with Yanmar 3GM30F having about 300 hours on her.   
Usually run at either 2400 or 3000.  Manual says 3200 is 'continuous'  
duty rating, 3600 is 'one hour' duty (also max per manual) rating.  I  
can reach all ratings with prop engaged; to my knowledge the engine  
has never produced smoke.

Bob Seastream
Intuition # 906


On Jul 30, 2008, at 6:43 PM, Bruce Stanley wrote:

> Hull1084, 250 hours, Yanmar 3YM30.
> no smoke.
> Usually run it at 2400 to 2800.
> Will check on what happens at 3200.
>
> Bruce Stanley C320 #1084
> Sydney Australia
> ===========================
> On Thu, Jul 31, 2008 at 2:43 AM, Len <aqua5len at gmail.com> wrote:
>
>> I have Hull #1070---Max revs show 3200 cruising in forward gear,  
>> but are
>> actually 3600 when tested in idle with digital tach.  Have never  
>> tested
>> when
>> cruising; under load max revs may well be 3200.  I usually go full  
>> throttle
>> when headed out to sea for about 20 minutes---never any  smoke.
>>
>> Len Krane
>> AQUA5   #1070
>>
>> On Wed, Jul 30, 2008 at 6:52 AM, Crosby Roper <vmdatsea at hotmail.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> I have hull # 1054  a Yanmar YM30 On our way down the coast from
>> Oceanside
>>> to San Diego, I ran the engine at high RPM's for a few minutes. The
>> engine
>>> has about 200 hrs on it and is well maintained. We have a 3-blade  
>>> fixed
>>> prop, original factory version. All was well until we ran the  
>>> RPM's up to
>>> 3200 and got brown smoke from the exhaust. We typically run the  
>>> engine at
>>> 2500-2700 RPM. Does anyone know the max RPM for this engine? (I  
>>> know it's
>> in
>>> the manual orlando, but the manual is on the boat and I'm not :))  
>>> Was the
>>> brown smoke a sign of engine overload? Any cause for concern?  
>>> Thanks for
>>> your help.Crosby Roper, VMD
>>> Hull # 1054 Tethys
>>> San Diego, CA
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