BigBear251 Posted March 9, 2012 #1 Posted March 9, 2012 Hi all, my question is why would my #1 cyl run cooler than the rest of the other cylinders? Had the carbs sycn., with the engine warmed up cyl #2,3,&4 runs about 185 to 200 degrees while #1 runs about 170. It idles ok, runs revs up ok. I have not done anything to the carbs. The cyl takes longer to warm up than the others. I have put new plugs and caps & sycn the carbs. Any suggestions or leave it be.
Black Owl Posted March 9, 2012 #2 Posted March 9, 2012 Could be running a bit richer than the other cylinders. But given the minimum variance, personally I wouldn't worry about it. If it is running a bit richer, the only thing that will happen is you may have to change the plug more often due to fouling. How is the compression in the cylinder compared to the others?
mbrood Posted March 10, 2012 #3 Posted March 10, 2012 Pull the four plugs and check their relationship. They should all be within the same condition.
Yammer Dan Posted March 10, 2012 #4 Posted March 10, 2012 (edited) Sea-Foam!! Sounds as if that cylinder ain't pulling its full load. Maybe because it ain't getting enough juice to do so. Edited March 10, 2012 by Yammer Dan
Marcarl Posted March 11, 2012 #5 Posted March 11, 2012 Bongobobny has the answer, I just gave it to him a couple of hours ago,,,, so I've lost it.
Venturous Randy Posted March 11, 2012 #6 Posted March 11, 2012 Have you checked the diaphragms for pin holes? A lazy carb slide can make that cylinder run a little richer. RandyA
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