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**DONOTDELETE** 12-21-2000 10:11 AM

81 CITATION
 
I have an 81 ski doo citation 4500 with a 377cc rotax twin,single carb. My problem is ihave one cylinder which is backfiring threw the carb. I have changed the plug and the external coil this has made no difference. thanks f15


**DONOTDELETE** 12-22-2000 12:45 AM

Re: 81 CITATION
 
first you'll have to take a compression test to see if the cylinders are near equal pressures then we can go from there


**DONOTDELETE** 12-22-2000 10:48 AM

Re: 81 CITATION
 
i have done a compression check and have 120psi in each cylinder . the cylinder that is backfiring ,ihave been having problems with the plug fouling out. thanks f15


**DONOTDELETE** 12-23-2000 08:19 PM

Re: 81 CITATION
 
check your porting. had acoil that went bad. i dont think it was that. check the pipe. see it is flowing freely.


**DONOTDELETE** 12-24-2000 01:08 AM

Re: 81 CITATION
 
replace the cap resistors on the ends of the spark plug wires they are cheap and they will cause this problem when bad, it will need them anyway.



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