1983 V20 Steplift
 

Need help on the correct size of propeller for my V20 Steplift 1983 , Evinrude 1987 140 V4 , Average of 4 people on board with 48 Bud/Corona on board , Two of the passenges will not disclose age and weight for "Security Reasons" The two guys are young 40 something 220 lbs each, Looking for speed vrs bow lift etc ..Please let me know the correct pitch ...

Re: 1983 V20 Steplift
 

a 15 x 17 OMC stainless prop.

Re: 1983 V20 Steplift
 

Small or large gearcase? If small gearcase I would go with a 13.5"X15 stainless, most likely a MICHIGAN RAPTURE or APOLLO for cost reasons.

Re: 1983 V20 Steplift
 

it's a large case ferm due to it's an 83 boat which has 25" transom

Re: 1983 V20 Steplift
 

I wasn't sure, I have an 86 140 lower unit here that is a 25" with a small hub on it.

Re: 1983 V20 Steplift
 

My '84 V-20 has a 20" transom.

Re: 1983 V20 Steplift
 

Guys thanks very much, I do know its a 25 inch I am not sure how will I know if its a large or small gare case ? Can i tell by looking at it ?

Re: 1983 V20 Steplift
 

Large gear case has roughly a 4.5" exhaust opening, a small one has a 4" opening.

Re: 1983 V20 Steplift
 

post a photo of the motor the experts will tell you everthing you need to know

Re: 1983 V20 Steplift
 

better yet count the splines on the prop shaft if 13 small foot if 15 spline then it's large foot.