Trimate Top Speeds

[77trimate4]

I saw a post for other boat top-speeds...What are some for the trimates Minie is a 77 trimate IV 140mercruiser, not sure what pitch the prop is (old michigan wheel no pitch #'s on it) but at 4200 (wot) its running 45-48 depending on the day. Tried turning a merc 4 blade 18" pitch, will let the engine go past 5000 rpm (still throttle left) 4000 rpm gives me around 35mph I'm assuming a 21" 3 blade should be better for top speed

 

[nu2it]

dude, I have the same boat. With a worn motor and a 21p ss prop I ran about 50mph. your max rpm should be 4600-4800rpm. I am thinking of going to a 22p cleaver. My motor is being rebuilt this weekend so I will have some new numbers in a few weeks.

 

[175checkmate]

nu2it, a cleaver is not a good prop on the trimate. Been there done that. Hole shot is junk as well as top speed. The cleaver is a stern lifting prop. What the trimate needs is bow lift and lots of it to free it up.

 

[77trimate4]

mine was running around 47mph with an unknown prop pitch (3 blade michigan wheel, didnt have any pitch numbers stamped in it)

Derek

 

[nu2it]

thanks for the heads up on the prop. what is the recomended prop?

 

[175checkmate]

The laser2 works real well on the O/B powered trimates. You may want to try one on yours. If you can find a place locally that sells props most will let you buy and try until you find one that works.

 

[77trimate4]

I just bought a 4 blade propel prop composite adjustable pitch from westmarine (westmarine.com) if that dosent work i'm just gonna stick with the 21" merc alum prop