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Hot!Won't Crank For Me!

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maddog56
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2016/09/08 19:15:50 (permalink)
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Won't Crank For Me!

I have an old (20 years) pressure washer that has a Briggs Stratton IntekPro OHV 110432-0036-E2 5-HP with horizontal shaft. A few weeks ago the connecting rod broke. I replaced the connecting rod and piston (with new rings). The bore was smooth and clean. I removed the cylinder head and cleaned valves etc. as best I could. It all looked good to me. Put it back together and set the valve/rocker arm clearances as per specs with piston a little past top dead center (at the start of the power stroke). I cannot get it to crank. It spits, pops a little, backfires a little (in a subdued fashion) or just does nothing (except spin when I pull the rope), but never really tries to crank real good. The muffler does heat up some so I know there is some amount of combustion at some point. The timing marks are all lined up, the camshaft lobes look ok to me. The camshaft is the only big piece left to replace. It is one of those with the plastic lobes/plastic timing gear, but with steel shaft. Maybe the big gear on the end of camshaft somehow rotated when the connecting rod broke, don't know. I've twisted it with my hands it feels solid. Maybe lobe tolerances/dimensions are more touchy than I realize. Flywheel key is also solid.  It was running great prior to connecting rod breaking. Maybe carb needs to be double checked.  Don't know, never been down this road before. Grasping at straws here.

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    Mikel1
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    Re: Won't Crank For Me! 2016/09/09 22:04:47 (permalink)
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    You need fuel, compression, spark and proper timing to run.
    Does it seem to spin or crank over easier than it used to before rod broke?
    maddog56
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    Re: Won't Crank For Me! 2016/09/10 19:02:10 (permalink)
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    It feels (spins) about the same. Today I installed carb kit, after cleaning it and blowing it with compressed air etc.  Still is not really trying to fire.  Like I said there is some combustion as the muffler warms up, but is not to hot to touch with bare fingers.  Still thinking valve adjustments are not what it likes yet?
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