Okay I've got a 95 900 ZXI and it was sunk (no fault of my own) When spark plugs were removed and cranked water blasted out of the pistons about 12 feet in the air (cool to watch but still sucks) Anyhow flushed the water and with a little help from carb cleaner got it running again. I was told to run it by a friend who was working on it and when I did a spark plug shot out because he didn't tighten them down and I didn't check anyhow before the spark plug mishap everything seemed fine. Afterwards not so good. Took it out yesterday and it struggles to get on plane, but flies on occasion whenever it decides it wants to work, sounds like it is running on 2 cyclinders or misfiring.... Half throttle sounds fine. Anyhow took a look later and the spark plug boots are ziptied to the plug wires (previous owner's fix) my roomate, a mechanic said that this may be my problem... When I pulled the plugs they were black and stunk of gasoline. I am just trying to get an outside opinion on this, please help diagnose the problem
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Re: Lost
They are zip-tied from the factory, get a new mechanic.
Remove the old plugs do a compression check 120-ish is normal lower will cause you problems. If the compression is OK then put new plugs in it and try again.Providing mobile JetSki service to the Charlotte / Lake Wylie area.
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Re: Lost
Well the plug wasn't tightened down at all I have some experience as far a mechanical stuff goes we did not know that they were zip tied from the factory and the wire pulled out of the boot VERY easily. the compression test may prove helpful. And as far as the bent electrode (what part are you referring to?) and yes they were brand new spark plugs what would you reccomend the gap be for a 95 900 ZXI?
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Re: Lost
I will be testing the compression here in a little bit. My roomate (a **** fine mechanic mind you) thinks that the connections to the plugs from the plug wires was bad I am going to strip down the wires and reconnect them as well and then I will ZIP TIE it considering that is OEM? anyhow hopefully this fixes something!
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Re: Lost
That is a good step be sure to trim 1/4" off the ends of the wires and screw the plug cap back on the wire. Use a little WD40 on the wire to help you screw it on then put a good zip-tie on to seal out any water.
The water in the cylinder will bend the ground bar up if the water is compressed sometimes and close the gap too much.
Here are the specs for the 96' they sould be the same as the 95'
General Specifications
Engine
Engine Type 2-stroke, 3-cylinder, Reed valve, Water cooled
Displacement 891 cc
Bore x Stroke 73.0 x 71.0 mm
Compression Ratio 5.5:1
Ignition System Magneto CDI (Digital)
Lubrication System Oil injection
Carburetor Keihin, CDK-II 38 X 3
Starting Electric
Drive System
Coupling Direct drive from engine
Jet Pump: Type Axial flow, single stage
Thrust 732 lb.
Steering Steerable nozzle
Braking Water Drag
Trim Adjustable
Hull
Length 2,760 mm
Width 1070 mm
Height 999 mm
Dry Weight 253 kg
Draft N/A
Fuel Tank Capacity 43 liter including reserve
Model Identification
Year & Model ‘96 JH900-A2:JET SKI 900 ZXi
Color Jet White/Jet Ski Violet (5V)
HIN Range KAW40001596 —
Engine No. Range JH900AE000001 —
Engine No. Location Top front reed valve housing cover
Tuning Specifications
Spark Plug NGK BR9ES
—Gap 0.7-0.8 mm
Ignition Timing 15° BTDC at 1,250 rpm
25° BTDC at 3,000 rpm
Carburetor
Idle Speed 1,250 ± 100 rpm (out of water)
Low Speed Needle N/A
High Speed Needle N/A
Compression Pressure 121 psi
JH9spcProviding mobile JetSki service to the Charlotte / Lake Wylie area.
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Re: Lost
Well reseated the plug wires into the boot and gapped them at .7-.8mm and found that they were fairly close to what they were previously gapped at turned the engine over and purred like a kitten but it pretty much did that before the problem was at higher RPM's it acted funny so hopefully I will be able to give it a decent test run today but it's not looking too good.
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Re: Lost
Allright started it back up again after redoing the spark plug wires.... It starts up fine but then when I give it gas as long as I am generally under half throttle it sounds fine but when I squeeze the gas it makes a strange noise and there is a lot of smoke out of the back the ski moves but gets to no where near where it should be speed wise hell it won't even get out of the water to get on plane.... I am wondering if it is cavitating though I don't really know full symptoms of cavitation. Then when I pulled it out of the water I revved it and noticed that when I hit full throttle it sounds like it's bogging down from about half throttle.... I am lost and a little pissed considering I am fixing all this damage that I didn't even cause! Any help/advice/thoughts ANYTHING would be appreciated
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