[C320-list] What is top RPM ?

[Len]

Better check your engine RPM with digital tachometer---when I checked my
3ym30 the boat tach read 3200 but digital confirmed actual was 3520 at full
throttle under load.  Have factory 3-blade prop.

I spoke with Yanmar engineer who said it's OK to run at full throttle for up
to an hour, then throttle back a bit.  Diesels love high revs.

Len Krane
AQUA%  #1070

On Mon, Jun 23, 2008 at 5:54 PM, Jeff Hare <catalina at thehares.com> wrote:

> I *should* have said that 3600 RPM is max engine speed, and I can't get
> there in gear on my boat with my prop.  Technically Yanmar likes to see
> that
> you can get to that rpm under load.  I'm sure my boat won't get much over
> 3450 in flat water, and probably most Yanmar 3gm30 320s don't do full RPM
> under load either.
>
> If you have lots of junk on the prop,  any kind of air restriction or
> clogged fuel filter, you might have trouble getting higher RPM.   Cable
> adjustment could be a problem too.
>
> If you have a clean prop, no air or fuel restrictions and have good
> compression then there's one very likely bet here:
>
> A Carbon buildup restriction in your exhaust elbow.  It's definitely worth
> inspecting as it may lead to engine problems should this be the case.
> This
> can happen if you run at low RPM a lot, since the exhaust doesn't get hot
> enough to keep the elbow clear.  From what I've heard on this list, once
> it's clogged, it's a replacement item, not a cleanout process.
>
> Just a few thoughts...
>
> -Jeff
>
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Joe
> Abbagnaro
> Sent: Monday, June 23, 2008 4:14 PM
> To: C320-List at catalina320.com
> Subject: Re: [C320-list] What is top RPM ?
>
> Jeff
>
> Wow 3600 Max RPM .... I think Wide Open Throttle for me
> is only 2900 RPM ..... Wonder if I have a cable adjustment problem....
>
> Joe
>
> On 6/23/08, catalina at thehares.com <catalina at thehares.com> wrote:
> > Hmm...
> >
> > I have to admit that I closed my Yanmar manual as fast as I opened it.
> > It's pretty much a steaming pile of bad english.  I never could find
> > anything I was looking for in it.  Now, having a decent Shop manual
> > written by people who both know how to write and also understand the
> > engine would be worth looking at.
> >
> > But to answer Joe's question with a general response:
> >
> > 1) 3600 is MAX RPM
> > 2) 3200 for a limited time (~hour or less)
> > 3) 2200-3000 indefinitely.  (We motored for 9 hours straight once at
> > roughly 2900 rpm and it purred the whole time.)  Well, that's what it
> > sounded like with my hearing protection on... :)
> >
> > -Jeff H.
> >
> > > Orlando
> > >
> > > I know its there ..... but no not looked at in detail.
> > > We have been working on other projects since we recently purchased  the
> > > boat.
> > > Installed a Garmin GPS, new ICOM DSC radio with remote MIC, New
> > > Battery charger, and finishing up the Auto Pilot install. Guess I have
> > > more homework to do .....  8^)
> > >
> > > Oh and also taking some time to figure out how to sail the boat ... 8^)
> > >
> > > Joe .
> > >
> > >
> > >
> > > On 6/23/08, Orlando.Duran at averydennison.com
> > > <Orlando.Duran at averydennison.com> wrote:
> > >> Take a look at the power curve...gives you an excellent view into
> RPM's
> > >> vs fuel consumption....
> > >>
> > >> So what you're saying is that you've never actually looked at manual..
> > >> :)
> > >> ----------------------------------
> > >> Regards,
> > >> OD
> > >>
> > >> Sent from my BlackBerry Wireless Handheld
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "Joe Abbagnaro" [jabbagna at gmail.com]
> > >> Sent: 06/23/2008 12:41 PM
> > >> To: C320-List at catalina320.com
> > >> Subject: Re: [C320-list] What is top RPM ?
> > >>
> > >> Hi
> > >>
> > >> I do have the Manual, did not know that info was in there.
> > >> I thought there was a formula needed to do the claculations.
> > >> I will check out the manual see waht info I can find out.
> > >>
> > >> Joe
> > >>
> > >> On 6/23/08, Orlando.Duran at averydennison.com
> > >> <Orlando.Duran at averydennison.com> wrote:
> > >> > You don't have a Yanmar operator's manual?
> > >> >
> > >> > Probably a good to idea to open it and at least browse thru, has a
> lot
> > >> of good info about the engine that's in your boat...
> > >> >
> > >> > Never know when you need to know stuff about your engine and you're
> a
> > >> long ways away from the internet...
> > >> > ----------------------------------
> > >> > Regards,
> > >> > OD
> > >> >
> > >> > Sent from my BlackBerry Wireless Handheld
> > >> >
> > >> >
> > >> > ----- Original Message -----
> > >> > From: "Joe Abbagnaro" [jabbagna at gmail.com]
> > >> > Sent: 06/23/2008 12:33 PM
> > >> > To: C320-List <c320-list at catalina320.org>
> > >> > Subject: [C320-list] What is top RPM ?
> > >> >
> > >> > What should be my wide open RPM ?
> > >> > What RPM should I cruise at ?
> > >> >
> > >> > I have Hull 574
> > >> > Yanmar 36M30F 27hp
> > >> > Kenzaki Transmission 2:2:1 ratio
> > >> > Standard 3 blade prop 15/11
> > >> >
> > >> > Thank You
> > >> > Joe
> > >> >
> > >> > - -----------------------------------------------------------------
> > >> > The information transmitted is intended only for the person or
> entity
> > >> to which it is addressed and may contain confidential and/or
> > >> privileged material. Any review, retransmission, dissemination or
> > >> other use of, or taking of any action in reliance upon, this
> > >> information by persons or entities other than the intended recipient
> > >> is prohibited. If you received this in error, please contact the
> > >> sender and delete the material from any computer.
> > >> >
> > >>
> > >> - -----------------------------------------------------------------
> > >> The information transmitted is intended only for the person or entity
> to
> > >> which it is addressed and may contain confidential and/or privileged
> > >> material. Any review, retransmission, dissemination or other use of,
> or
> > >> taking of any action in reliance upon, this information by persons or
> > >> entities other than the intended recipient is prohibited. If you
> > >> received this in error, please contact the sender and delete the
> > >> material from any computer.
> > >>
> > >
> >
> >
> >
>
>