FREDO wrote:
OOps sorry my mistake I thought they had a prop just for pontoons on their
website.

I would have to look around at there site- You still might be right :-)
that they have a prop just for pontoons.

I just wanted to point out that the bigfoot "engines" does have some
differences vs the standard 60 hp..

Cheers:

Capt Jack R..

http://www.mercurypartsexpress.com/P...re=Accessories
"Jack Redington" wrote in message
ink.net...

FREDO wrote:

Mercury makes a bigfoot prop for pontoons
"Ron Knapik" wrote in message
...


OK, if it was a Johnson, they make a hydrus prop specifically for pontoon
application. I'm sure merc makes something on the same line, check with
a
Merc dealer.

Ron

The Mercury Bigfoot is more then just a prop..

From the Mercury site:
"BigFoot models feature greater torque, larger propellers, and beefed up
drive-train components to handle the extra weight and turbulence of
pontoons."

Capt Jack R..


wrote in message
legroups.com...


wrote in message
legroups.com...


Background - Got a 21' pontoon with 40 HP 2-stroke, wasn't expecting a
speed demon but was hoping I could squeeze a little more out of it.
Only hitting 13 and change (GPS measured speed).
Someone suggested that the prop was too big since it was only turning
5k rpms. So asked around, seemed like a 9 was the consensus. Check

it


out yesterday, it has a 10 on it.

So I'm all excited thinking this is going to help me out... plug the
numbers in the prop calculator (
http://www.boatpropellers.com/propcalc.html ), maybe 1/2 mph increase?
Assuming the engine will spin up to 5500 with a 9. Sound right?

I wasn't sure about 'prop slip' so I reversed it out by what I knew

from current numbers. Came out to 45% and from what I read that's

possible with non-planing hulls. Guess I'm also wondering if there

may


be more or less prop slip with the 9 vs. the 10.


Ron Knapik wrote:


What year and brand motor


1998 Mercury