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Feels like my tractor is only at half the power

1143 Views 13 Replies 8 Participants Last post by  markusedma
I just changed out my cylinder head and rods. I cut grass for about 1 hr and now it seems like I'm only getting half the power. I took off valve covers on both sides and all looks ok. 1 spark plug was dry and jet black with soot the other was damp and gray looking. I have a Briggs & Stratton 24 hp els725 ohm engine. Muffler sounds a little muffled too. Engine sounds weak not like when running good. Any ideas.
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Ok ill try. It did have a big backfire while starting
The rods were bent and the seal on the spring was out. Yes the push rods. The spark plug works just checked that. I'm seeing light black exhaust coming out too.
What im saying is the plug sparked good when grounded. So the plug is good.
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