Changing transom from single to twin engines

[rolmops]

Hello.<br />I have a 1964 17' Duratech built in Peekeskill,NY.<br />It is rated for an 80 horse engine, 1964 horses, so probably 70 of today's. Aluminum thickness heavier than most of today's boats.<br />In the inside in the middle of the transom there is a wooden support(16x20x1 1/4) that goes from top to bottom in order to support the engine.It is in good shape.Would a marine plywood board of 3/4" thickness on the outside of the transom of 30" width and 16" height be sufficient for 2 35 horse seahorses (1957),or do I have to make a more structural change?<br />Thanks for your opinions and advice.<br />Rolmops

 

[JB]

Re: Changing transom from single to twin engines

I wouldn't think any reinforcement would be necessary, Rolmops.<br /><br />Transom strength is needed to handle the thrust and torque, more than the weight, of the power (except for trailering, where transom savers would fit the bill).<br /><br />Since you propose engine power less than the rated max I expect that you have enough already.<br /><br />Good luck.

 

[DJ]

Re: Changing transom from single to twin engines

rolmops,<br /><br />I completely agree with JB regarding the load on transom. <br /><br />Your twin 35's will not even approach the horsepower design limit of the transom.

 

[rolmops]

Re: Changing transom from single to twin engines

Hello.<br />I wish I was that lucky every day.<br />Thanks very much to both of you for this piece of good news.<br />Rolmops.