I've got an old Toro Timecutter 42-Z with a B&S 16HP OHV engine. I was cutting with it and it pretty much sputtered out and died. I tried to start it back and the engine will only go about halfway and seems to hit something preventing it from going further. I can hand turn the flywheel easily either direction about 180 degrees and it stops. I'm pretty sure it's not a valve adjustment. I'm not an engine guy. Does anyone have any thoughts on what to look for before I tear into it? Thanks
B&S engine wont hand turn more than halfway
- Thread starter MB2014
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Well that don't sound good at all. It acting something on top of the piston like a broken valve seat. There is only two ways of verifying this. One is to use a bore scope and other is to pull the cylinder head. Now something could have failed in the crankcase too.
sgkent
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that happens when something in the cylinder hits it. Pull the head and see what is in there or if you have a borescope use it. There is one on amazon for $17 that can be used with a phone or laptop. https://www.amazon.com/gp/product/B07PBF6DX5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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Finally one small enough for those 10 mm plugs. Added to my list for the next order.
sgkent
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bummer, cheaper just to get a replacement engine. If you are near any mower salvage yards you might find a good used engine at a reasonable enough cost to chance it. But if the mower is good otherwise, a new engine is often the least costly way to go.