32 MC Prop

ATM

Ensign
Joined
Jan 14, 2012
Posts
13
Likes
1
Have a 32 MC with 300 hp cat 3116 , 2800 rpm ,2/1 Twin Disc. Boat is basic lobster boat as far as weight. Prop on there is 23x20 rh bronze,1 3/4 shaft, looking for advice on a larger diameter prop. Dont run boat hard looking for best efficientcy at 12-13 knots, any prop meisters with some input? Plenty of room for bigger wheel. Engine turns up 2800 on dash tach wot ,never no loaded engine at dock (THATS SCARY!) thanks
 

fvthunder

Ensign
Joined
Nov 28, 2011
Posts
13
Likes
1
I had a 32 Mitchell with a 300 John Deere @ 2450, 2:1 TwinDisc, basic boat.......that turned a 26x27.5 with a full cup
 

ATM

Ensign
Joined
Jan 14, 2012
Posts
13
Likes
1
no cage ,use boat for tuna fishing , get 19.5 knts at wot and as said that is at 2800
 

ATM

Ensign
Joined
Jan 14, 2012
Posts
13
Likes
1
32mc prop

Thanks for that. boat definitly needs new wheel , and that seems more in line with other 32MC's that i have seen.
 

captainlarry84

Rear Admiral
Joined
Sep 13, 2011
Posts
1,295
Likes
239
Location
Freeport NY
Boat Make
KristenFormer Charter Captain
You are there!

You are where you want to be. Granted even though you can take a larger diameter you will need to give up pitch. I would not change the wheel. Your efficiency currently with your 23 X 20 is .85% you are there. 85% with a keeled boat is very good. If you went with a 26 wheel your pitch would be only 17 your WOT speed at 100% would be 19.60 knots. You will never achieve 100% wheel efficiency in a DE boat.
 
Top Bottom