XP 2002 wont start...??

[frodi]

My xp wont fire up.. I have cheked all the fuel filters, the sparkplugs are new and have a good spark.. It backfires after i turn it a few times..
What can be the problem??

 

[kustomkarl]

It might be the rotary valve timing off. What is the seadoo's background?

Karl

 

[timmyboy76]

bad gas? When was carbs gone thru last?

 

[frodi]

I changed the pistons and the reed valves. I cant get it to fire up now..

 

[frodi]

The gas is from last week.. I cleaned the carb filter today and it still wont start..

 

[kustomkarl]

That's right reed valves on that model...See if one is improperly installed. That would cause it to back fire. Are the pistons bigger or std as the originals were.

Karl

 

[frodi]

I orderd std size pistons.. I messured the diameter but not the length...

 

[frodi]

Is there anything else i can check ??

 

[timmyboy76]

Made sure the arrow on top of piston/s was facing toward the exhaust port/s.

 

[frodi]

The pistons are installed correctly...

 

[kustomkarl]

Check to see if there is a air leak somewhere around the intake. What else did you do besides top end and reed valves? Are the carb lines correct...maybe something is back words. Give it all a look over again.
Let me know so we can get it running for the weekend.

Karl

 

[frodi]

I have had the entire engine apart.. I had to replace the crankshaft, the pistons and the reed valves..
I´m not sure that the fuel lines are correct mounted but the plugs get vet after i crank it a few times..
I cant wait to get it running again

 

[frodi]

What is the standard sice of the pistons and cylinder in diameter??

 

[timmyboy76]

frodi.....bummer you havn't got her running. See if adjustments on carbs are right....LSA/HSA., also recheck compression...wont hurt...:cheers:

 

[frodi]

I think my compression device is busted.. I got only 80psi this time... I have to get a new one to be sure it works properly..