Join Date: May 2019
Location: Georgia's lake country
2004 XLT 1200 rear cylinder dropping out
Purchased a 2004 XLT 1200 in February- had been winterized, power valve servo recently replaced, and cat d-plate kit installed, new spark plugs.
Ran great first two weekend outings, then this past weekend while running at speed RPM drops to 4000 rpm at WOT. Back at the dock a simple feel of the cylinder head indicated that rear cylinder had dropped out- it was warm while others were hot to the touch.
Pulled the spark plug and it was wet. Cleaned and dried the plug, back on the water and all was good for about 100 yards of running and then same thing. I have repeated this twice now.
Servo is actuating the power valves during cranking and power valve on rear cylinder is ok.
Suspicion at this point is coil pack, but would a coil pack fail intermittently? Any suggestions on what to check next?