OK, this is my second attempt at this. Only got two responses last time and neither contained the fix. 2001 Ultra 150 fouls plugs after 3-5 hrs. Had it to the dealer twice and they can't seem to find anything wrong other than plugs fouled. They seem to foul in order, #1 first, #2 second and within 3-5 hrs of replacing. Using stock plugs, which it ran fine on for 4 years (1 set). Fuel lines, filter and return lines and check valve all ok. Not sure about fuel pump, although my filter never seems to have more than a tablespoon of gas in it. Changing the plugs is all it needs to run fine, for 3-5 hrs. I did use a gallon of Yamalube just prior to all this when I couldn't find any kawasaki oil one weekend, would this make this kind of problem? HELP!!!
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Ultra still not running right
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Re: Ultra still not running right
Definitely check the oil cable. No Yamalube would not do that. What is your top RPM when it's running correctly? What plugs are you using?SBT Tech Support is here to help with your problems.
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Re: Ultra still not running right
Originally posted by LuvToSkiRuns right around 6800-7000 rpm right after new plugs installed. Using the stock NGK BR9ES plugs.
THEY DO NOT PROPERLY TORQUE THE SPARK PLUGS!!!!!
The specs are 17 foot-pounds or 1/2 to 2/3 of a turn after the crush washer touches the cylinder head.
This can and will have a direct effect on spark plug life, and the plug's ability to resist fouling.
This is quoted directly from the NGK Spark Plug website:
Athough this website does not specifically state "for PWC" the same data applies.
http://www.ngksparkplugs.com/techin...1300&country=US
"Torque is one of the most critical aspects of spark plug installation. Torque directly affects the spark plugs' ability to transfer heat out of the combustion chamber. A spark plug that is under-torqued will not be fully seated on the cylinder head, hence heat transfer will be slowed. This will tend to elevate combustion chamber temperatures to unsafe levels, and pre-ignition and detonation will usually follow. Serious engine damage is not far behind.
An over-torqued spark plug can suffer from severe stress to the Metal Shell which in turn can distort the spark plug's inner gas seals or even cause a hairline fracture to the spark plug's insulator...in either case, heat transfer can again be slowed and the above mentioned conditions can occur."
Make sure to properly gap/install/torque your spark plugs.John Kubiak
Powersports Technical Training Professional
Las Vegas, Nevada
Sea-Doo Tech 13736
PWC Tech since 1988 (22 years)
PowerSports since 1976 (34 years)
NEVER BUY TIRES AT A "BLOW-OUT" SALE
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Re: Ultra still not running right
try disableing the oil pump and premixing.
see if that solves the prob.
if it does then you have it narrowed to the pump or pump adjustment.
have you done a compression check?.. that comes first ALWAYS!!!!!
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Re: Ultra still not running right
3 things come to mind, and I can't remember if I told you this in your older post or not.
1: Check the oil pump cable make sure it is adjusted correctly. If you don't know what the exact specs are, post and I will tell you them.
2: How does the engine run when it is on new plugs. Is there any heisation at all? Does it bog down when you go from idle to Wide Open? Does it seem slower then normal? (When it is running on good plugs?)
3: Not all oils are created equal. I doubt that running Yami lub makes a difference, but I have never ran it in either of my 1200 so I don't know how it would react. Again I doubt that is the problem... but just stating everything I can think of that will cause this.Paul
2001-Level 2 Ultra 150
2002-1100STX DI
2004-15F
2002-30' Baja Outlaw
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Re: Ultra still not running right
Correct you can not convert an Ultra to premix.
If you are fouling plugs during normal riding then you have a problem.
What speed/s are you running when the #1 fouls out?Providing mobile JetSki service to the Charlotte / Lake Wylie area.
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Re: Ultra still not running right
Oh I'm convinced I have a problem. It ran like a raped ape for 4 years on the same set of plugs. Now I can't get 5 hours out of a set.
I feel the first cylinder quit at about 2/3 trottle, just cruising. But over the 3-5 hour period that the plugs do last, it's been operated at every speed from idle to WOT.
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