Devan
New Member
Hi All,
I had an oil lock on my 96 XP and ended up doing a full rebuild with new WSM crank, rebuilt counterbalance shaft, complete rotary valve shaft and new WSM pistons and rings. I also had everything sandblasted and powder-coated the exhaust after having all the water lugs replaced and tig welded. Also put another Mukini kit through the carbs and new carbon ring kit.
Ski runs great and cant be happier although only 140 PSI on each barrel after the rebuild.
During this rebuild i came across another XP hull with crankcase and jetpump for a steal, i also then got most of the parts i needed off another damaged sunk ski all i had to do was take the motor out and jetpump and the guy gave me the rest for $100. The other parts for the engine i ordered from fresh water locations in the US. Great set of std barrels with pistons and head with no salt water corrosion. a great set of carbs will be arriving from Minnesota soon. All i need to do on the second ski is get a new crankshaft, counter balance shaft rebuild and have the exhaust lugs replaced and then sandblasted and powder coated before it is all put back together.
I still have a bit to do on the second XP but thought i would test the MPEM from the sunk xp in my working ski. I get the double beep and it started but backfired and ran very rough. I had to clean the earth connectors on the rectifier and it runs a bit smoother with no backfiring but does not rev above around 4000 rpm. I did change out the rectifier from my working XP computer box but it did not make a difference and still does not rev above 4000 and still sounds rough but no more backfiring.
Luckily I can change out the other three components to find what part may be fault but i still think it may be a earthing problem. Thanks for any advice in advance.
My original XP
Engine after rebuild
Second XP Hull
Third Damaged XP
Second XP with gel coat cut and polish and new Hydro Turf
Parts from Third Damaged ski ready to be cleaned and installed in second XP Hull
Left box has the fault
I had an oil lock on my 96 XP and ended up doing a full rebuild with new WSM crank, rebuilt counterbalance shaft, complete rotary valve shaft and new WSM pistons and rings. I also had everything sandblasted and powder-coated the exhaust after having all the water lugs replaced and tig welded. Also put another Mukini kit through the carbs and new carbon ring kit.
Ski runs great and cant be happier although only 140 PSI on each barrel after the rebuild.
During this rebuild i came across another XP hull with crankcase and jetpump for a steal, i also then got most of the parts i needed off another damaged sunk ski all i had to do was take the motor out and jetpump and the guy gave me the rest for $100. The other parts for the engine i ordered from fresh water locations in the US. Great set of std barrels with pistons and head with no salt water corrosion. a great set of carbs will be arriving from Minnesota soon. All i need to do on the second ski is get a new crankshaft, counter balance shaft rebuild and have the exhaust lugs replaced and then sandblasted and powder coated before it is all put back together.
I still have a bit to do on the second XP but thought i would test the MPEM from the sunk xp in my working ski. I get the double beep and it started but backfired and ran very rough. I had to clean the earth connectors on the rectifier and it runs a bit smoother with no backfiring but does not rev above around 4000 rpm. I did change out the rectifier from my working XP computer box but it did not make a difference and still does not rev above 4000 and still sounds rough but no more backfiring.
Luckily I can change out the other three components to find what part may be fault but i still think it may be a earthing problem. Thanks for any advice in advance.
My original XP
Engine after rebuild
Second XP Hull
Third Damaged XP
Second XP with gel coat cut and polish and new Hydro Turf
Parts from Third Damaged ski ready to be cleaned and installed in second XP Hull
Left box has the fault
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