heres more pics all home made hope to get some input need more speed gota little video to

Nice project. Without knowing much about your boat, I think you could probably gain a bit of speed be switching to a surface drive setup (and propping accordingly) and also by adding a tuned pipe instead of a straight pipe like you have now.

Very nice looking hull,subsurface drive is ok not sure about props for that as ive never ran sub surface drives lol.You may find a slightly bigger prop will help as weedy engines dont rev so high so we usually use bigger props.Maybe try a 70 mm or 75 mm diam prop.Unless your engine is modified a tuned pipe wont do much to be honest.As i said on the other thread check the carb diam and maybe go a little bigger such as the walbro wa 167.
Mart

thanks mart im gonna try the 75 mm prop gotta order one wish i knew some boaters around my area ill have to say building this boat has been alot of fun took me tree weeks my carb is a walbro wt 71 b7 is all i can see on it with out taking it off had a zama h18b 44p on it before what is a wet pipe and how does it work water derectly into pipe
alan

Yea a wet pipe has water injected into it,most use a dry pipe with water cooling water doesnt enter pipe just into a chamber usually sealed with o rings.Most also have a cooling flange at the header also.I just checked your video out she seems to handle pretty well in the rough water.Never gonna be a speed demon with a stock weedy engine but def fun.Once you find the right prop that will help but you could allways modify the motor some there are threads on how to if you dont know.
Mart
Heres one i built for someone it had a tuned pipe,this was its first outing with an oversized prop about 25 mph.Still went ok but once we got the right prop it was a lot better probs arround 35 mph.

I ORDERED TWO PROPS 75MM 80MM SHOULD GET THEM NEXT WEEK BUT IT DIES AFTER ABOUT TEN MINUTES CHECKED VENT ON TANK THATS OK THINKING MAYBE GETTING HOT IM GONNA VENT THE BACK HATCH LET THE HEAT OUT AND WHAT MODS DO THEY HAVE FOR WEEDYS

I thought my vent was fine but it wasnt,id dbl check lol.If its not that has your tank got a clunk?,have you checked the carb diaphram for wrinkles also.I didnt think you were running a hatch ?,air cooled motors need to be run open top.As regards mods you can port the engine,theres a few how to,s arround.
Mart

Nice work,
Is that radio box sealable? It would worry me being so close to the fuel tank.

radio box is on the right side, up high hanging on the side not sure if its sealed or not i didnt make a sealed box gonna do one soon

i can blow air through the cap not tons but some and i put a open vent on last time it was in the water still stalled in about ten min and by time i got it in 15min later it still didnt stay running dam weed eater took the plastic off over the head was that ok or not a good move because of air cooling lol broke the moter mount made a better one hope it lasts cant see it very good but got pics i shaved my strut down and made it sharper in the front its homemade anyway made it out of a down hill ski lol but its working need to find out were the boaters around here go or build another so my girl can play to lol build another anyway hey thanks for helping me out with stuff i put some little vents on the back hope it let heat out
alan