transom thicknes

[ranger42]

hey the boat im restoring. a 15 ft fiberglass bow rider it only had a 3/4 plywood transom. which held a 70 hp evenrude. most i have read usaly uses 2 3/4 plywood transom. but this would not give enough room for my cap to go back on. what im asking is 3/4 thick enough to hold a 70 hp evenrude

 

[jigngrub]

Re: transom thicknes

I wouldn't do it and it sounds like the boat is overpowered, what does the coast guard maximum capacities sticker say?

 

[DeepBlue2010]

Re: transom thicknes

The thickness will depend on the engine. If you can find the manual for the engine, it will tell you the recommended thickness. Try the first link on this thread

http://forums.iboats.com/johnson-evinrude-outboards/manuals-diagrams-301361.html

Courtesy of iBoats Engine Repair and Maintenance folks

 

[Woodonglass]

Re: transom thicknes

It depends on the glass. How thick is the outer skin of the boat and the inner skin? How old is the boat? Who's the mfg? 70 hp is usually the max. hp for most vintage 15 ft boats.

 

[ranger42]

Re: transom thicknes

It depends on the glass. How thick is the outer skin of the boat and the inner skin? How old is the boat? Who's the mfg? 70 hp is usually the max. hp for most vintage 15 ft boats.

its a 1976 blazer trihull. the fiberglass at the transom is 3/16 think

 

[Woodonglass]

Re: transom thicknes

What does the top cap connection look like? How thick of a transom would the top cap joint accommodate?