Hi all, <br /><br />After some advice from this list I decided to try the water decarb method..<br /><br />All went well and I pulled the plug when I was finished.. they were spotlessly clean..<br />so its great for that.. but the tops of the pistons still had crud on them.. as tested with a thin screw driver through the plug hole.<br /><br />So now I will try the OMC stuff and see if that results in clean pistons..<br /><br />One interesting thing I noticed,, once the motor had run for 10 minutes or so after the water, I decided to put some CRC thought it.. (sort of like Wd40 only flamable) on three cylinders it caused a big increase in revs, but the last one.. I think its cyl 3 spraying into that carb throat almost killed the engine.. I am not sure but that indicates to me that that cyl wasn't firing... and spraying something in there to compress put more load on the engine and slowed it down somewhat.. (hey I'm guessing)<br /><br />anyway.. I sprayed CRC all through it, running and not.. then pulled all the plugs and turned it over with my finger in each hole. (to eliminate a hole in piston..) all cylinders had strong compression and all seemed very close together as far as compression goes.. (anything over 15psi is usually noticable to a finger) anyway I think compression is not the problem, but I will buy a compression tester to make sure tomorrow.<br /><br />This motor has a brand new powerpack and all the wiring is good and firm.. (Johnson 72 100HP)<br /><br />I can assume that since spraying crc down the carb throat didn't cause it to fire, the problem isnt' fuel starvation on that cyl or it would have fired and reved like the others did..<br /><br />That leaves electrical..<br /><br />So, my question is this.. what can I do to start eliminating this? First step would be to swap plugs to another cyl and see if the problem moves.<br /><br />second would be to test the lead somehow..<br /><br />any tips anyone?<br /><br /><br />rgds<br /><br />Frank<br /><br />PS.. how are you supposed to get a water mist down the carb throat without opening the butterflies at least half way and reving the cr@p out of your moter? (which isnt' recommended on water muffs with no load.)
