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Feels like my tractor is only at half the power

1141 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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Muffler sounds funny, I would start looking there for blockage...after you have checked your flywheel key as others have mentioned.

If your spark plugs aren't new, I can't imagine installing new heads without new sparks, but hey, I can't blame a guy for saving $10 whenever possible.

Holding a spark plug against the ground is 'good', but it really doesn't tell you much as compared to a spark plug working under pressure, that is why professionals use 'spark testers' and other equipment. Occasionally even a new spark plug turns out to be a dud.

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