Routy
Serious Thumper
Offline
SuzukiSavage.com Rocks!
Posts: 2280
Winston Oregon
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Till 6 months ago, I just knew a valve would never stick in a guide while it is running, especially at 1/2 throttle, light load, and in cool weather. Now I know better,......in that my 17 hp twin cyl Briggs dropped 1 cylinder,..... stuck an intake valve,.... under those exact conditions, and for NO apparent reason. No noise, no damage, just pulled the head freed up the valve(w-d) and back together, used hd gasket and all,...running fine ever since. But I now run a couple ozs of top oil in the gas.
So,.....if these engines had much of a history of valve sticking, I'd run just a touch of top oil, even if it was plain ole 30 wt. And on my Riding mower forum, most the guys there run top oil all the time, in engines that are heavily loaded in hot weather. It can really save an engine, and up the longivity of the top end combustion area by a bunch.
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