[C320-list] Normal Performance Limits?

[Monte B.]

I didn't disagree with Rod. I reiterate, these instrument systems (tachs)
are poorly calibrated and if you normally run your engine at a conservative
RPM and then firewall it you may expect to see smoke just from the higher
exhaust gas temp burning combustion deposits out of the exhaust system. That
having been said I would agree that prop pitch controls max. RPM.

Monte
Laima #620

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
joe at dolphinmortgage.com
Sent: Friday, October 03, 2008 8:32 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Normal Performance Limits?

I agree with Rod, low RPM and black smoke with clean bottom & Prop means it
is overpitched. Should run at 3600 RPM at Max throttle.
Joe Barrett

-----Original Message-----
From: Monte B. [mailto:mjbc60 at sbcglobal.net]
Sent: Friday, October 3, 2008 08:53 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Normal Performance Limits?

These boats also have notoriously inaccurate tach,s, something else to
check. Monte Laima #620 -----Original Message----- From:
c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Rod Boer Sent:
Friday, October 03, 2008 7:12 PM To: C320-List at Catalina320.com Subject: Re:
[C320-list] Normal Performance Limits? It sounds to me that you are over
propped. You should be able to get up to 3400 RPM. Can you adjust the pitch
on the Kiwi? If so, just reduce the pitch and you should be able to get up
to the full RPM Rod Boer Odyssey, #688 -----Original Message----- From:
c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Amirault
Family - S&B Sent: Friday, October 03, 2008 7:01 PM To:
c320-list at catalina320.com Subject: [C320-list] Normal Performance Limits? I
had my boat on the water yesterday afternoon for likely the last sail of the
season. Although the wind was 15-20 knots on departure it had dropped to
near nil by the time the crew decided to head for home. To ensure we arrived
at the dock before dark I slowly pushed the throttle to maximum. On still
water this gave me revs at 2900, knots at 6.75 and plenty of black smoke. On
easing the throttle back to 2500 revs I was able to maintain 6 knots and
eliminate the smoke. I have a Yanmar 3GM30, a clean bottom and a Kiwi prop.
Is this approximately normal? Brian Amirault #797 Waltzing Bear, too