[C320-list] Max RPM on Yanmar YM30

[Len]

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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