Thread: Pontoon Dingy build.

Originally Posted by Micky Duck

man that is a sweet wee boat....... it will fair fly along when you chuck a 15hp on her......

Had a test run with a mate and his 15hp yam last weekend. 250kilo payload not counting fuel and motor weight =WOT 38kph, easy cruise at 27-30 kph.

One thing I did not realise when I built this is different manufactures have different leg lenghts in the same leg length eg "Short" yam is 17.1- 17.3 inch.
I built it to have the highest transom that would suit my current 8hp yam at 17.1 inch, it goes well only cavitating at full trim and turning tight, the 15hp is 17.3 but looking over the back the difference the cav plate is under is more like 3/4 inch, no cavitation unless sever turning at full trim.

The fourstroke suzi 20 I was dreaming of is 15 inch so not going to work.
Tohasu 18hp two stroke is 17.1 and a couple hundy cheaper than a 15 yam for 3 more hp so probably where I will end up.