Petrol Mower Stalled On Long Grass - Now No Power

[V8RX7]

I have a single cylinder kohler mower it stalled on long grass - it sounded like a multi cylinder that was only running on one.

It restarted easily but still sounded the same, eventually after playing with the throttle I could start it at low revs and then increase them and it now sounded fine, however as soon as I engaged the blades it either stalled or again sounded like it dropped a cylinder - remembering it only has the one !

As the start of the season it wouldn't start and I cleaned the carb - which wasn't visibly dirty.

It also has a recent plug and filter.

Any suggestions before I change the coil - as I can't see what else there is.

[NDA]

It sounds like it could be the carburettor....

[finlo]

Have you checked the fuel?

[paintman]

Possible faulty plug? If you've still got the old one and if it ran OK on it then refit & see what happens.

[Condi]

Nearly always crap in the carb. Or old/no fuel.

[V8RX7]

New(ish) fuel in the tank, 3/4 full - was cutting fine 2 weeks ago.

Surely misfiring is coil ?

However I'll happily whip it off and take a look.

[GreenV8S]

V8RX7 said:

Surely misfiring is coil ?

No. Misfiring could be caused by anything affecting the mixture, spark strength/timing or compression. The coil is only one of many possible causes.

[NDA]

Not sure what the carburettor is like on your machine, but I know from owning many petrol garden toys, that they can be very temperamental once they've been fiddled with. The symptoms you've described, do sound like a carb issue - have you tried adjusting the idle speed?

[kev b]

My guess is a blocked main jet, or perhaps water in the fuel,you can usually get to these quite easily by removing the float bowl.

[Mr2Mike]

Condi said:

Nearly always crap in the carb.

How often do you have to do that?


The oldies are the best, right?

[overunder12g]

If it was long wet grass then possibly jammed blades and a safety cut out has clicked in.
Maybe check handbook?
Mine will do this if it gets blocked with wet grass.

[mybrainhurts]

Have you tried turning it off and on again?

[Mr2Mike]

Check the flywheel hasn't moved on the crank. I have seen this happen on a rotary mower when the blade suddenly jamed, and it screws the ignition timing.

[Madrabbit]

I had similar thing with my Briggs and Stratton, but with a scaffolding clamp left by some roofers. It was difficult to start and ran really rough.
I stripped the top down to find the keyway in the aluminium flywheel had been enlarged by the sudden stop. This put the timing out enough to cause poor running.