Cylinder gasket replacement

[poetbruce]

Hello I am trying to replace cylinder gasket. Parts list is showing different MM in size
I have 97 challenger
Any thought on which one to use

 

[mikidymac]

You need to see how many holes are in the old one.

If you don't have the old one you are going to have to measure the squish clearance. It is in the manual that you can download for free.

If you get it wrong and guess you could have low power or worse burn up a piston.

 

[poetbruce]

Why are there 5 cylinder gaskets offered for the 97 challenger

 

[mikidymac]

Because of machining tolerances seadoo made different thickness gaskets to set the distance between the cylinder head and piston crown known as the "Squish" clearance.

Too much clearance and you will get poor performance. To little clearance you will get detonation and destroy the piston.

You have to measure it to determine what gasket you need.

 

[poetbruce]

So there could be different sizes for any 97 challenger? That's weird

 

[poetbruce]

Just took a closer look going to need cylinder sleeves replaced, have cracks

 

[mikidymac]

All seadoo 2-strokes are like this. You have to measure and get the correct base gasket.