what,s the standard prop. 1994 120 hp force by merc.

[bentle]

Just got a 1994 Maxum 18ft with a 94 120 force by mercy. outboard. Anyone know the standard
Prop size for this motor. Inch and pich would be great. Thanks

 

[Frank Acampora]

Re: what,s the standard prop. 1994 120 hp force by merc.

These props should be listed right here at iboats store. They may also have a prop calculator for pitch.

Diameter is 13 inch I believe it is still a small hub --4 inch-- prop. Pitch--you are asking how high is high and how hot is hot.

However, with an 18 foot boat I would start with no higher than 17 pitch. This is where you really need to calculate because it will depend upon the weight of your boat too. However, maybe someone with an 18 foot Maxum will jump in and tell you what size they are using.

Anyway, you want to prop the engine so that it runs at about 5000-5200 RPM or maximum RPM range at wide open throttle.

 

[bentle]

Re: what,s the standard prop. 1994 120 hp force by merc.

Thanks frank. I do have a 17 pich aluminum 3 blade on it now. Up on plane it is awesome but coming out of the hole it takes a bit. Not going to be very good for pulling tubes. Im thinking a 15 pich might just do the trick. What do you think about that?
Thanks.

 

[craze1cars]

Re: what,s the standard prop. 1994 120 hp force by merc.

What are your current rpms at top speed, with your current 17 pitch prop?

Dropping to a 15 will undoubtedly improve your holeshot...good. It might also cause you to over-rev at top speed...bad. With your answer to above question we can guide you more accurately.

 

[jason32038]

Re: what,s the standard prop. 1994 120 hp force by merc.

15 4 blade or 15 stainless