WEE Boats - Engines Jet Unit Tech info

[jetdesign]

Hi guys looking at getting into the small jet game and wondering which would be a better donor ski.
I heard Kawasaki skis are the go and have found a  kawasaki zxi1100 and a Kawasaki Ultra 150 for around the same money.
If someone could give advice on the pros and cons of each that would be great.
Cheers!

Do you prefer "Ring ting ting"
or not

seriously though
what year and how many hours on each
what kinda condition etc
personally prefer 4 stroke
quiet boat = happy boat

[careyl]

Both look in not bad condition the ZXI1100 is a 96 and the Ultra 150 is a 2000 both look in not bad condition with 100 hours on each for $4500. What would you recommend? Looked into sr20 with colorado or similar but seems like these would be heavy in a 3m hull?

[roland]

get a seadoo rotax supercharged rxp

[jetdesign]

Both look in not bad condition the ZXI1100 is a 96 and the Ultra 150 is a 2000 both look in not bad condition with 100 hours on each for $4500. What would you recommend? Looked into sr20 with colorado or similar but seems like these would be heavy in a 3m hull?

inspect the jet pumps
look for damage to the wear rings,stators and impellers
I would go for the 15f depending on condition

[Karl]

The ultra has an odd- ball pump with a tapered impeller, The 1100 ZXI and 900/1100 STX's all have the same 148mm pump.

[steely]

well after nearly cooking my engine on the weekend due to a small stone blocking the 10mm cooling outlet on the unit i thought id better do what i should of done last week before i left

i removed the standard fitting and welded up the 10mm hole, then scalloped a piece of 25mm pipe to fit above and marked where it would be fitted, then drilled 24 2.5mm holes within that area, then welded the pipe in place and tapped a thread in the open end for the fitting.
mabye a bit of overkill on the holes however it does allow 20 holes to be blocked and i still will have 10mm of area supplying water to the engine

[PM]

well after nearly cooking my engine on the weekend due to a small stone blocking the 10mm cooling outlet on the unit i thought id better do what i should of done last week before i left

i removed the standard fitting and welded up the 10mm hole, then scalloped a piece of 25mm pipe to fit above and marked where it would be fitted, then drilled 24 2.5mm holes within that area, then welded the pipe in place and tapped a thread in the open end for the fitting.
mabye a bit of overkill on the holes however it does allow 20 holes to be blocked and i still will have 10mm of area supplying water to the engine

You may wish to check your math with regard to area. You'd only be able to 1/3 of the holes to give you the original area of the 10mm hole.

Your new setup gives 122.72mm2
Original setup gives 78.54mm2

ie; 4 x 2.5mm diameter holes does not give you the same area as 1 x 10mm diameter hole...

[steely]

true PM you are very right i dident even work it out, never did school c maths too dumb....
im a do it and see if it works sort of bloke

i should of worded my above post more along the lines of the standard system needed only one stone to block the line now it needs 24
KISS
keep it simple stupid

[jetdesign]

Nice work Steely
that's pimpin

[mohawk]

Have you shown it too karl  ..

[Matthewf/Norbert/TuiDog]

good work steely

poor cooling is what keeps jet ski shops rich!

i fitted a sand trap, works well.

[jetdesign]

Have you shown it to karl??  ..

Is it the rocks in the water take off that's the problem?

[Cookie]

I've fitted an irrigation filter to mine. I leave the drain tap part way open so it self cleans. Works well, and dirt cheap.

[mohawk]

I've fitted an irrigation filter to mine. I leave the drain tap part way open so it self cleans. Works well, and dirt cheap.

Its getting water too the filter thats the problem with these units cookie.

[Cookie]

Ah yes - there is that too !!