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Hello Guys, After having had a little fun with my "new" 316-8 onan P216G version. The engine sounds like it is short on fuel...I don't hear any backfiring. But i think i do hear "strokes" without a "firing" (ill record it later sorry...hope u know what im trying to indicate) Now, i want to have it "perfect" as far as i can do...im not knowledgable but the forum is of great help ! So far: I changed fuel lines, I did a decarbon (heads came of) I cleaned the carburetor all new gaskets, new sparks ... -BPR5EFS (seems to be the same) -I measured the coil ...ohms are within specs. -new air filter, fuel filter etc. -While cleaning the heads i didn't notice anything wrong with the valve seats but that could be of course... -And set the valve distance to specs (0.13...0.33mm..(speaking from my mind)) Put it all back and it did ran a whole lot better...no smoke..I can engage the PTO without shutting the engine down which seemed to be the case previously as it was really struggling.....but still.... it isnt running that well (after say 10min just like previous). The engine is back on my desk, as for me it was rather dirty the first case and i didnt do "all" my mistake, bit to excited about my first horse ! ...and you just can reach everything better...i want to be "sure" (also remeasured the valve clearance) etc. anyway: I dismounted the flywheel, and yes, there was loads of rubbish the magnets all clean now. (Made sure the flywheel came of nice and easy...btw...got that warning :-)) Im now thinking in lines of : (planning to do:) 1- not enough fuel... (but why would that "happen" after 10...15 minutes ? maybe the fuel pump ? I can check that if it runs bad..and i "put a litlle in the carburetor" 2- due to heat "something" changes and bad air gets sucked in...I can check that if i have it mounted back on by bringing some WD40 while it is running and see if the sound changes 3-The carburetor has vacuum issues ? ...or perhaps the "float" isn't good. I will check that.. 4-I didnt do anything yet with those breather intake tubes and filters...maybe its there... need to read up on that. 4-wiring.. Im now at the stage where i'm trying to "search" reading a manual i read : IMPORTANT: Do not hold flywheel from turning with a pry bar in the fins. Doing so may damage the fins. That line i do not understand ... its from another forum but should be about the onan engine. Could some one give me a hint ? Other "hints" that i could do to "verify" now...while it is on my working desk would be highly welcomed !!! Ill go back to "cleaning" ... Thank you for your time in advance !