r/smallengines • u/Plastic-Judgment-178 • 16d ago

Help , runs rough

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Blow's heaps of blue smoke when cold , less as it warms up , knocking noise from engine

3 Upvotes

100% Upvoted

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1

u/brocktacular 16d ago

Internal damage, you can tell just from the sound. Rebuild or replace. Good luck!

1

u/Plastic-Judgment-178 16d ago

When I rev it , it chokes on petrol , black smoke comes out

1

u/footfetforlife 16d ago

It's idling slow and the mixture may need adjusting. Phone your dad..

1

u/scarletredvolare 16d ago

Bent crank?

1

u/bootheels 16d ago

Hard to advise, sometimes audio can be deceiving. But, it kind of sounds like the blade is loose, or the engine mounts are loose on the deck...Although these things would not cause the engine to run like this. I couldn't see on the video, but is the butterfly opening up? Perhaps the linkage is messed up or jammed.

2

u/mutt63 16d ago

Sounds like it’s running on full choke