32 MC Prop

[ATM]

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]

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

 

[F/V First Team]

410 Sisu 1.77:1 26x36

Are you running a cage? Or was there a cage on your boat, that would explain the reduced diameter.

 

[Badlatitude]

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

Thunder are u in Florida?

 

[ATM]

no cage ,use boat for tuna fishing , get 19.5 knts at wot and as said that is at 2800

 

[F/V First Team]

If you can find one, borrow a 26" wheel, 26 square might do the trick right off the shelf. Should be a fairly common size.

 

[ATM]

32mc prop

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

 

[BillD]

Thunder are u in Florida?

f/v Thunder (Shaun) is a lobsterman up in Maine.
He had a very nice 32 Mitchell Cove he sold last year.
Pretty sure he was moving up to a bigger boat.

 

[Badlatitude]

Oh there was an F/V Thunder docked near me in FL

 

[captainlarry84]

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.