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What pitch propeller for NS3.5A on an American 18' sailboat?

whitegreg56

Regular Contributor
It is a 3.5 HP two-stroke.
Seems the propeller disappeared....either the cotter pin came out, or someone stole the propeller.

There are a couple of plastic/resin replacements available....both are the same diameter....but, different pitches.
Don't know what pitch to get!
 
They are all 7.4" diameter. They are all 3 blades. 4.5 through 7 pitch. The 6 pitch is aluminum; the rest are resin. You want fairly low pitch to get WOT RPM over 5000, since you have a fairly heavy load. My two top choices would be:
ALUMINUMLIGHT7.4633F0B645120

or
RESINMODERATE7.45.73Y309641060M

The resin one came with the motor originally.
 
Also, noticed that on our Tohatsu M3.5A, there is a 2-bladed propeller (white)
with chips taken out of one of the tips. Pitch unknown.
Replace with the propeller you mentioned above (309641060M)?
 
Way back in 1992, there were two 2-bladed props available; one in aluminum (6P), and one in resin (6.5P). I don't believe either is available 30 years later. Both had a lot of slip. So, go with the 3-blade prop. Just select either aluminum or resin. Get a new SS drive pin, and a new cotter.
 
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