surfsalterpath
Member
Pretty much a complete rebuild of a 1996 Brunswick 25' pontoon boat and down to
the propeller replacement for our 1996 Force 75hp outboard motor. I think the prop now
is the OE from 1996. The numbers stamped on the prop are:
OE Quick Silver 48 97868 A10 9P
I'm assuming this is a "9 PITCH" prop but that is all I can decipher from this number being the
novice I am. Anyone help with what the numbers mean? Is the DIAMETER in this stamped #?
I would like to replace the propeller with one that offers faster top speed. I realize we will lose
some torque (faster out of the water) with the higher PITCH (ie: 10p, 11p, 12p, etc) but willing
to sacrifice the out of water faster for top end speed as we do not pull tubers etc.
My questions are:
#1: Which PITCH would be the most efficient for the 1996 FORCE 75hp to get the better top speed
and not damage the engine in making the change?
#2: Would installing a new propeller that has "cupped" blades offer any better efficiencies
for top end speed?
#3: Would it be best to go back with a "Quick Silver" propeller or shop the after-market products
which often provide newer and better technologies?
#4: Any idea specifically which DIAMETER/PITCH propeller would be the best for my situation?
I know the answer to my real question. Yes, it would be best to ditch the '96 FORCE and install a brand new 115hp newer 2-stroke design (not real interested in the 4-strokes for this salt water environment and the extra weight it would add to the 25' pontoon) but my goal is to run the 75hp till it dies. At this point, the way it's running is it might outlive me!!! ha ha!
Thanks for any suggestions from you experts with any experience in propeller upgrades.
the propeller replacement for our 1996 Force 75hp outboard motor. I think the prop now
is the OE from 1996. The numbers stamped on the prop are:
OE Quick Silver 48 97868 A10 9P
I'm assuming this is a "9 PITCH" prop but that is all I can decipher from this number being the
novice I am. Anyone help with what the numbers mean? Is the DIAMETER in this stamped #?
I would like to replace the propeller with one that offers faster top speed. I realize we will lose
some torque (faster out of the water) with the higher PITCH (ie: 10p, 11p, 12p, etc) but willing
to sacrifice the out of water faster for top end speed as we do not pull tubers etc.
My questions are:
#1: Which PITCH would be the most efficient for the 1996 FORCE 75hp to get the better top speed
and not damage the engine in making the change?
#2: Would installing a new propeller that has "cupped" blades offer any better efficiencies
for top end speed?
#3: Would it be best to go back with a "Quick Silver" propeller or shop the after-market products
which often provide newer and better technologies?
#4: Any idea specifically which DIAMETER/PITCH propeller would be the best for my situation?
I know the answer to my real question. Yes, it would be best to ditch the '96 FORCE and install a brand new 115hp newer 2-stroke design (not real interested in the 4-strokes for this salt water environment and the extra weight it would add to the 25' pontoon) but my goal is to run the 75hp till it dies. At this point, the way it's running is it might outlive me!!! ha ha!
Thanks for any suggestions from you experts with any experience in propeller upgrades.