What does it mean when a jet ski has low compression?
There are several causes you can eliminate if your cylinders are losing compression. Exhaust valves and air intake valves at the top of the cylinder can also get overheated, and leak gas or the valve seals can become too worn to seal the gas in properly. Either way, the result is often low compression.
How much compression should a jet ski have?
It depends on the gauge, sometimes they’re way off, or not testing right, bring yours and test it. It should be closer to 140-150, as long as both cylinders are close 5-10lbs you should be fine, but the higher the number the better…
What should the compression be on a 717 Seadoo?
150 psi is normal compression.. And you should not reuse paper or metal gaskets (o-rings can be re-used).. 50/1 premix with oil injection should not foul plugs within a couple of minutes..
How much compression should a 2 stroke Jet Ski have?
There is not one compression for all engines. You should perform this procedure at least twice per cylinder. Most two-cylinder engines should have about 140psi, but not all. Most three-cylinder engines use a lower compression usually around 110psi.
How long does it take for a jet ski battery to die?
The high-quality, well-maintained jet ski batteries last 3 to 5 years. Their proper maintenance includes regular charging if you don’t ride the ski, and proper winterization and storage during the cold months. In contrast, neglected jet ski batteries only last 1 to 2 years!
Does a jet ski charge the battery?
Yes, jet skis have a charging system, however, it’s not the same system as in a car, as it can’t fully charge the battery in a jet ski. Instead, it can only maintain the current charge in your battery! This means if you start your ride with a weak battery, you can’t expect the jet ski to fully charge it.
Is the Kawasaki 750 jet ski high performance?
Strong low speed power is needed to permit smooth controlled turns, as well as getting heavier riders up on plane. A secondary performance problem is the lack of peak water speed ability compared to other high performance crafts. Making good increases in the acceleration and peak speed of a 750, without hurting reliability, is not difficult.
What causes air leak on Kawasaki 750 jet ski?
Air leaks, not engine modifications, are by far the number one cause of 750 piston seizures. Group K offers a simple-to-use pressure test kit that allows you to quickly test for any air leaks that your engine may have. (kit includes block offs to test all current Kawasaki, Yamaha & Sea Doo models)
What causes a 750 jet ski to have a seizure?
However engines with deteriorated crank seals or brittle intake gaskets can allow outside air to leak into the lower end during operation. This “air leak” can make the fuel mixture lean enough, at high rpms, to cause a piston seizure. Air leaks, not engine modifications, are by far the number one cause of 750 piston seizures.
What should the air pressure be on a Kawasaki 750?
AIR LEAKS – The lower end of your 750 should be totally air tight up to 8 psi. New engines pass this test with no problems. However engines with deteriorated crank seals or brittle intake gaskets can allow outside air to leak into the lower end during operation.