Small jet engine

About using jet ski motors to power small boats

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dx787
Posts: 4
Joined: Sun Mar 30, 2008 6:29 pm

Small jet engine

Post by dx787 » Sun Mar 30, 2008 6:33 pm

Whats the smallest jet engine/pump used or able to be found. I have an idea but weight and size would be pretty crucial. Ive tried some research but info is a little grey and not much of it. Thanks for input!

marksa1458
Posts: 166
Joined: Mon Sep 12, 2005 5:57 am
Location: Massachusetts
Contact:

Post by marksa1458 » Wed Apr 02, 2008 7:53 am

Probably a Kawasaki 440, they used in the older standups.
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/

dx787
Posts: 4
Joined: Sun Mar 30, 2008 6:29 pm

Post by dx787 » Thu Apr 03, 2008 2:39 pm

Cool, cause im lookin for enough to plane but not faster than 30mph. This is all pretty new to me and didnt know if there was maybe a two stroke option or if there are even jet drives that would fit a small four stroke or even be able to give me enough power. Would I have to try and salvage an old ski or they available new? Thx

marksa1458
Posts: 166
Joined: Mon Sep 12, 2005 5:57 am
Location: Massachusetts
Contact:

Post by marksa1458 » Fri Apr 04, 2008 7:24 am

dx787 - Your best bet is a salvage ski. Try finding something with extensive hull damage in the front and a running engine. If you find something with a seized/blown engine and the core is good, you can ship to SBT and they will rebuild it for you - runs about a $1,000 but comes with an unlimited two year warranty. You will also need a ton of other parts from the ski, electonics, pumps, cooling lines, fittings etc... so look for a "complete" ski. Stay away from new or trying to buy the parts individually, there are just too many parts you need and would take forever to source them all.

You may also want to look at older seadoos. Much easier to cut out the pump, but more of a pain to align the engine.

Some good skis to look at would be the Kawasaki TS, X2, 440, 550, Seadoo SP, SPX, XP etc...

You can also go the berkley route which is a completely different animal. You will need the pump, and engine, transmission/coupler and you will need to build a tunnel for it - Don't have any experience with this route and can't really provide any good advice.

Most of the Jetski's you will run into are 2 strokes, some are premix and others have an oil tank and gas tank and are mixed by the engine. Four stroke engines are becoming more popular on the new skis and some of those engines put out better than 200 hp.
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/

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