Re: prop pitch?

I generally like to keep rpms closer to 3000 when cruising which pushes me
in the mid 20s, depending on whether I'm going with or against the chop. My
redline is also around 4000 rpm with low-mid 30 mph max., but I don't like
to push an engine this old. We did on occasion up to ~10 years ago and the
result was an overheat light within a few minutes. Now I'm more concerned
about things like rods, pins, and bearings. The boat usually planes between
15-20 and will get there very quickly if I goose the throttle. I'm on
vacation next week and hope to put on a lot of hours so I could write down
some detailed info (rpm, plane & top speeds for each prop) if it would be
helpful.

You should always have a spare prop if you're on a big lake (I'm on southern
Lake Huron), but I'd find a prop repair shop before scraping the old one.
Depending on how bad the damage is, they usually do a pretty good job on
repairs. It cost me $30 to repair minor damage on my 18 and $35 to get the
22 knocked down a few years ago. Had I gone through a boat store instead of
direct to the repair shop, prices would've been double+ in time and money
and they would've sent it to the same place I took it!

----- Original Message -----
From: "Eric Graczkowski" <ericg@...>
To: <omc-boats@...>
Sent: Wednesday, July 16, 2003 7:16 AM
Subject: Re: prop pitch?

> Very interesting write up. With that information in mind, what is your
ideal
> RPM? I am not aware of the pitch on the prop I have, but plane at about
3500
> and max at 4000 RPM. Maybe 34 MPH tops. Anyone else have similar
experience
> with the V6? If so could I approximate the pitch based on others
experience?
> The prop I am running met some gravel suddenly and am looking for a
> replacement... merely considering the possibilities.
>
> Eric
> 1966 Sportsman 150
> Oshkosh, WI
> ----- Original Message -----
> From: "Andy Perakes" <aperakes@...>
> To: <omc-boats@...>
> Sent: Tuesday, July 15, 2003 10:36 PM
> Subject: Re: prop pitch?
>
>
> > I have 3 props (16, 18, and ~21) for my 155 Hp '67 Reveler i/o. (Just
> like
> > the one on e-Bay -- thanks much for sending the link!!) The 18 is
pretty
> > good for all-around use. The 16 revs high, but still functions okay and
> > gives me lots of power (8 skiers at once). The ~21 used to be a 20 that
> my
> > smarty brother had upsized to a 22 about 20 years ago thinking it'd make
> the
> > boat go faster. The effect was it acted like a governor with groggy
> > performance and wouldn't swing over ~3000 rpm. I had it whacked down a
> > little, but it still clips me at 3500 rpm. So, based on my humble
> > experience, you really can't deviate a whole lot from nominal (maybe 1-2
> > sizes up or down tops). My guess is a 12 would scream rpms. If you're
> just
> > looking for a spare prop for emergencies, it'd probably work, but I'd go
> > with the 14 given the choice.
> >
> > For others with the Buick V6 155 Hp engine: As an original owner
running
> in
> > fresh water only during short Michigan summers, we've faced two regular
> > problems: about every 10-15 years, both the alternator and the water
pump
> > need to be replaced. As someone previously mentioned, parts are now
> > obsolete and very expensive. I kept my old parts in hopes of rebuilding
> > them, but so far haven't found parts for my parts (stator for the
> alternator
> > and shaft/impellor for the pump, in particular). Our winterizing
> procedure
> > for 36 years has been to follow the instructions in the owner's manual
> which
> > simply states (only slightly shortened) open the petcocks and dump some
> oil
> > down the carb. Last year I started pulling the cooling hose in an
effort
> to
> > dry things inside out a little quicker, but I'm a little leery about
mice
> > moving in. If anyone has any tips that have worked for them on
> > servicing/maintaining/winterizing this engine, I'd love to hear them,
> > especially if you know any good sources for parts (water pump prices
> ranged
> > from $380 to over $500 last year!!!)
> >
> > ----- Original Message -----
> > From: <Pated66@...>
> > To: <omc-boats@...>
> > Sent: Tuesday, July 15, 2003 4:53 PM
> > Subject: RE: prop pitch?
> >
> >
> > > My concern would be the RPM you're running. the lower # props are
going
> > to let your motor turn faster and lessen your top end.
> > >
> > > Bill Desmond <nebdlo@...> wrote:
> > >
> > > >
> > > >my rouge 210 has a 14 x 18 prop on it. i saw a couple
> > > >props on ebay. 1 is 14p and the other is 12p. my ?
> > > >is, how much will it gear the boat down. right now the
> > > >boat is on small lake so top speed is not much of an
> > > >issue. i will be pulling skiers and tubes. ive never
> > > >experimented with prop pitch so i dont know if going
> > > >from 18p to 12p will be alright or if i will end up
> > > >with a tug boat.
> > > >thanx
> > > >daemian
> > > >
> > > >__________________________________
> > > >Do you Yahoo!?
> > > >SBC Yahoo! DSL - Now only $29.95 per month!
> > > >http://sbc.yahoo.com
> > > >
> > >
> >
>
>
Received on Wednesday, 16 July 2003