Timing is fixed - the only way it can be wrong is for the flywheel key to have sheared (usually after hitting something solid with the blade).
If you are suffering from kick-back when starting, first check that the blade is not loose. If that's OK, the flywheel will have to be removed to check the key.
SOURCE: Hello I have a Mountfield MPR10071 46
I suspect you mean the OPC (operator presence control) lever? This is a safety feature - if you let go, the blades stop. Since your mower does not have a blade clutch, this means the engine stops.
All walk-behinds HAVE to have this feature if manufactured after (I think) 2002 in the UK - similar rules apply elsewhere.
There's no easy way to disable it - if you tie up the handle so you can empty the grass catcher with the engine running, you will find that you have no way of stopping the engine.
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SOURCE: honda gcv 160 engine
Hi. Remove the float bowl nut and cleanout the hole the float bowl nut screws into. Also clan out the side holes in the float bowl nut itself. There is debris in the bottom of the float bowl tht is restricting fuel flow. Pretty simple fix. Just make sure that you have the bowl gasket aligned when you re-install the float bowl. Otherwise it will leak fuel.
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Kelly
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