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97 force 120 prop size

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DustyNachos

New member
I have 120 HP force rated at 5250 RPM. My current prop is three blade laser2 22 pitch. I’m not sure what my WOT rpm is *exactly* but it’s somewhere about 5500. I’m planning to change props but my issue is a very slow hole shot. Will a three blade prop with less pitch fix the hole shot as well as the RPM? I’m also considering a four blade. Thanks. Boat is 98 nitro 185 F&S. Mainly used for two person trolling but occasionally have full capacity.
 
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The Laser 22p isn't what I'd call a "fishing" prop??
Yours stainless or aluminum?

You need to know "exactly" what the rpm's are to figure out the right prop.
They sell a small portable tach, called a Tiny Tach
Just hook it to the first plug wire and go for a ride.

I'm not a prop expert but a 19p would probably give a better hole shot and better economy??
Contact Michigan Propeller they have a prop finder service.
Or contact the manufacturer of the boat(if they're still in business) they should be able to tell what you need?
 
Jerryjerry05 said:
The Laser 22p isn't what I'd call a "fishing" prop??
Yours stainless or aluminum?

You need to know "exactly" what the rpm's are to figure out the right prop.
They sell a small portable tach, called a Tiny Tach
Just hook it to the first plug wire and go for a ride.

I'm not a prop expert but a 19p would probably give a better hole shot and better economy??
Contact Michigan Propeller they have a prop finder service.
Or contact the manufacturer of the boat(if they're still in business) they should be able to tell what you need?
Click to expand...


ok. Wot was 5700 rpm. I’m getting a hydrofoil today to see what that does. But I think I want a 4 blade prop and not the foil. Since I’m running over my rpm that means I need to go to a bigger pitch right? I have a 22P on now. I’m also thinking this should increase my top end slightly but that may be wishful thinking. Any help is appreciated.
 
Normal operating range is probably 53-5500
So going up in size should get(maybe) a little more speed.
A 23p should do?

You try Michigan Propeller, Solas Props?
iboatshas a prop forum, maybe they can help?
 
I have a big Force prop, 3 blade stainless. Will check the size and see what my table shows. It's not new but very nice condition. 4 blade may give a better launch, but I have noticed they may not be as economical in the long run.
 
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