Monro tiller

This topic contains 16 replies, has 2 voices, and was last updated by  charlie 3 weeks, 2 days ago.

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  • #36836

    john-e-w
    Participant

    Now I have the rotovator up and running, the only problem I have is when I stop it after 45-50mins work and it’s nice and warm. It stops OK but in doing so it backfires quite alarmingly. Does that mean that it is too far advanced or too far retarded. I must say I’m not a fan of adjusting the timing by the placement of the flywheel on the tapered shaft – why on earth didn’t they fix the flywheel and timing with a key-way?

    Any advice welcomed
    John

    #36837

    charlie
    Keymaster

    It could well be. When I set the timing on these engines I remove the cylinder head so I can measure the distance from TDC accurately. To find point at which contacts open I have invested in a magneto timing light, but before buying that I used a very thin piece of paper between the points to determine when they just start to open. When tightening the flywheel nut I check the timing to make sure the flywheel has not moved. Finally to make sure the flywheel nut is tight I give the spanner a good hard whack with a hammer, fortunately I have the correct flogging/slogging spanner which is designed to be hit with a hammer.
    Is the points gap correct? Check this first as it the easiest.
    Are the valves set correctly and are the valve seats and faces in good order, no pits or burning?

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