99 1200 xlt limited compresion issue

[jerry m]

we had the ski in the water over the weekend ran fine for about an hour it died after about 10 min. it started back up they road about 1/2 mile it died again then started back up for about another 1/2 mile died again by then the battery was dead we had to tow it in we charged the battery it started fine idle is a little rough . cheked the compresion tonight front has 150 center has 125 back has 105 any one have any idea what the problem is just had the cat removed and installed d plate also the speed fluxuates from about 52 to 35 then back up

[Technical Support]

Re: 99 1200 xlt limited compresion issue

You really need to see what your cylinders look like to truly tell what’s going on. Remove the head and look into the cylinders for signs of scuffing on the walls, if you see scuffing you are probably sticking a piston and that’s what is shutting the engine off. In a case like this if the cylinder is not getting fed enough fuel the piston gets too hot too fast and expands rapidly and grabs the cylinder wall (sticking the piston). Correct fuel flow, meaning clean and properly adjusted carbs is everything to having a 2 stroke engine survive, starve it on fuel and its TOAST. If you find scuffing, 9 out of 10 times is from dirty carbs or an air leak in the crankcase leaning out your fuel mixture. Start by inspecting the cylinders for damage, if you find damage go into the carbs for the possibly cause, if carbs are PERFECT then look for air leaks in the crankcase. Crank seals or case halves leaking or cylinder base gaskets that might have failed will case an air leak and a lean condition.

[jerry m]

Re: 99 1200 xlt limited compresion issue

ok thanks if i pull the head and find the cylinder walls scared what is the next step and what would be a ballpark of the expence

[Technical Support]

Re: 99 1200 xlt limited compresion issue

1st pull the head and see whats going on.