Thread: Mini jetboats with Jetski engines

Originally Posted by mikee

I'll get ya some pics if you like when i go past tomorrow

I've confuzzled myself
I'm off to Tui tomorrow .. A&G I think it is?

ive seen some horrible aluminuim mig welds.. a lot faster than the tig tho.

I think it cost my mate 1500 for the material time and welding it up

Fo Spanners, Driving past one of the local engineering workshops I found these out side (and 1 inside, and one down the local river)

My mate built the two stacked on the trailer .
Top ones 8 ft 550 pole ski engine and unit . Weighs about 180kg and good for about 60 kmph
Bottom ones a 9 footer , 750 Kawasaki ski engine and unit . Weighs about 200 kg and good for 65-70 kmph depending on how rooted the unit is at the time .
Like a few guys now he prefers smaller 4 stoke car engines (Suzuki m15a /Toyota 1nzfe ) for reliability and noise .
If your set on using jetski engines plan on rebuilding a few of them .

Originally Posted by mohawk

My mate built the two stacked on the trailer .
Top ones 8 ft 550 pole ski engine and unit . Weighs about 180kg and good for about 60 kmph
Bottom ones a 9 footer , 750 Kawasaki ski engine and unit . Weighs about 200 kg and good for 65-70 kmph depending on how rooted the unit is at the time .
Like a few guys now he prefers smaller 4 stoke car engines (Suzuki m15a /Toyota 1nzfe ) for reliability and noise .
If your set on using jetski engines plan on rebuilding a few of them .

Here they are in action from page 2 of this thread

Kawasaki 550 jet boat testing. - YouTube

Gotta love them 2strokes
8 foot kawasaki 550 powered jet boat - YouTube

I was set on a 1100cc 11" boat... The old boy thinks we need 14"...
Will do some more research
I like the 4st idea as less maint, but also like the 2st ski motors as less weight and have rebuild a few and like the kawasakis

Not going to build as dont have the time so will buy finished boat

Originally Posted by Spanners

I was set on a 1100cc 11" boat... The old boy thinks we need 14"...
Will do some more research
I like the 4st idea as less maint, but also like the 2st ski motors as less weight and have rebuild a few and like the kawasakis

Not going to build as dont have the time so will buy finished boat

Your old boys on to it and so are you , Ive got a 14 and a 10 and DONT want any more lol.

No one beats this dude. He is in a class of his own.

Goats small 3.0m jetboat for sale

Originally Posted by TeRei

No one beats this dude. He is in a class of his own.

Goats small 3.0m jetboat for sale

He makes a great film , but the class is way more crowded than you realise , and has been for over 50 years mate.

Originally Posted by mohawk

He makes a great film , but the class is way more crowded than you realise , and has been for over 50 years mate.

Tongue in cheek.

Cos he has a tube channel?

what about these.... 1500cc Plastic jetboat

Tuffjets.co.nz - Home of the world's southern most plastic jetboat - Tuff Jets Southland - The home of the best plastic jet boat that takes you where other boats won't

Ive been told they are pretty wet too ride in , and Ive never liked how much they seem too sell for either.
My little boat is 40 kg lighter , has more room inside and probably a lot cheaper too build .

Looks like I have sorted a hull... around 3.6m, might end up being 3.4 yet
Its a hull a guys down sth designed in cad and built, and is now scaling up. 1.5 at the chine.
Hes going to build his soon and if all ok I'll buy the plans and get a mates old man to lazer it out and will find someone local to weld it up.
Basically pic below scaled up 20%

Umming and arrring engine wise.
Was going to use a 1100 Kawasaki but speaking to a mate down sth thats done a couple of wireups in the, he seems to think the Suzuki M15A is the way to go.
Would be quieter, more fuel efficient, but heavier 100kg vs 70kg which I dont think makes that much difference, and would need to be marinised