How do determine Transom height

H

heyjay

Recruit
Joined
Apr 4, 2007
Messages
3
I replaced my transom this weekend, the previous owner has made a repair and added approx 3" to the top.
I am curious how do determine the correct height for a transom. the boat is '71 Glastron V191. 119' length, Trihull, 150 Evinrude O/B.
any thoughts?
thanks
Jay
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: How do determine Transom height

the standard heights are 16 and 20. from the keel to the top of the transom. it totally depends on the engine you use. a short or long shaft. they probably add the height inorder to accomodate the 150.
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,513
Re: How do determine Transom height

Ayuh,.........

Nowadays it's 16", 20" or 25"..........Depending on the Motor your hanging on it........
 
M

mikesea

Lieutenant Commander
Joined
Oct 1, 2006
Messages
1,830
Re: How do determine Transom height

you need to determine the shaft size of the engine,measure from the point the engine would sit on the transom to the cavitation plate on the lower unit,it will be 20 or 25 inches,that would then determine the distance on the transom,should be the same,might be an inch or two,you can make that up by the mounting holes onthe engine,you want the water to flow from under the boat ,under the cavitation plate
 
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