Harry, gas tank and fuel system thoroughly cleaned, and it did not
act like it was starving for gas.

I did not have the powerhead apart, so if the pistons are in backwards,
they been that way for 30 plus years? …… but worth a check.

I thought about the prop, and eyed up the one on my 38 Sportfour,
but not being in the same room, it was hard to tell, but I “think”
the prop on the 36 is more aggressive.

The Crestliner isn’t super heavy, and I’m used to running it with a 35 hp
Big Twin, and never ran it with a comparable HP motor to the Sportfour.
I did have my 38 Sportfour on my little Alumacraft, and that was
on the scary side! That motor wound up nice.

VIDEO……..
https://youtu.be/FKA02V4t7QY

Haven’t got to the props yet, but I did pull all four sparkplugs.
They all appeared “tan-ish”, with some tiny chunks of carbon
all over, the bottom cylinders being a little wet looking,
but that’s probably the nature of the beast.

All pistons appear oriented the same, and that is, they
appear “flat”. Lighting, depth perception, and the angle
of vision, doesn’t permit seeing the piston slope.
I’m assuming the piston do have slopes, and hence, they’re
on the exhaust side.

Will compare props between the two Sportfours next.
I’m very hesitant about putting this “Electric” version
on my little Alumacraft, as it’s quite a bit heavier, and
very “top heavy” with that DC motor atop.

I need to figure out a way to make the spark advance lever stay where
I want it. There’s no adjustable means to do so. I did install a spring
washer on the shaft that the lever is attached to, but that didn’t do the trick.

labrador-guy wrote:

Buc you usually have things clean as a whistle.  Did you check the exhaust relief ports?  They might be clogged up with carbon.  That old timer probably got a bunch of 30w oil in it’s day.  The exhaust relief ports are in the muffler where the cooling water exits.

dale

Yes, the exhaust housing was off, and the exhaust ports were wide
open, and rings free.