Andrei,
I just looked in my outboard repair manual and another listed cause for your
symptoms is clogged high speed jet in the carburator. If I remember from one
of your earlier posts, this boat and motor sat for a while before you bought it
and the fuel/oil mix may have congealed and clogged your jets. If you are
handy, you can order and install a carburator overhaul kit (after cleaning the
carb). If not an outboard shop can do it for you.
Ron
M17 #14
Griselda
> From: [EMAIL PROTECTED]> Date: Sat, 19 Jul 2008 11:59:59 -0500> To:
> [email protected]> Subject: Re: M_Boats: Is my outboard
> in trouble?> > I'd agree with Ron 100% on this as a possible cause. I guess I
> assumed > the YT was the "twin" to my Johnson Sailmaster.> > Funny that none
> of the manufacturers still make dedicated sailboat > motors....for
> displacement boats that never operate at speed, and could > used fixed
> throttles and low pitch, high thrust generating props.> > If you buy a new
> motor now, what do you folks do to get the prop right?> > > On Jul 19, 2008,
> at 11:50 AM, Ronnie Keeler wrote:> > >> > Andrei,> >> > I had a Yachtwin 4 hp
> on my old Balboa 20 and had similar problems. > > The solution was to change
> the prop to what Evinrude called a ""power > > prop". The stock prop on that
> motor was probably intended for a light > > john boat or small dinghy. The
> flatter the pitch, the lighter the > > load on the motor and the higher it
> will rev. Two cycle motors don't > > deliver much horsepower at low RPMs and
> your motor should run at > > maximum RPM at Wide Open throttle with a light
> load in the boat.> >> > Iboats website has a prop selector guide that may
> have your motor > > listed and the recommended prop for heavy load
> applications. My 21 > > foot pontoon boat was not performing well with the
> origonal 16 pitch > > prop that came with the 40 HP Mercury and I used the
> iboats prop guide > > to determine that I need a 9 or 10 pitch prop. The boat
> performs best > > with the 10 pitch when lightly loaded and best with the 9
> when loaded > > with a half dozen or more people.> >> > I have a longshaft
> full gearshift Evinrude 4hp on my M17 which works > > very well but it has
> the "power Prop".> >> > Ron> > M17 #14> > Griselda> > >
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