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Collection, Preservation and Display of Old Lawn Mowers

No spark on MK7 Suffolk Punch

Hi. I'm new to petrol mowers and got myself an old Suffolk Punch MKVII.

It was working fine after I had a specialist sort the carburetor out, but a couple of weeks ago it wouldn't start. I checked for a spark but nothing. I'm assuming points and condenser are at fault so was wondering if these parts can be bought and where do I buy them?

Thanks in advance




wristpin Tue, 24/08/2021

Don’t assume...... First, remove the plug , remove the connector from the end of the high tension lead and check for a spark from the bare end. If there is then a spark the culprit will be either the connector or the plug.

Still no spark and it could , as you surmise, be either the points or the condenser, but is  most likely to be that the points require cleaning or adjusting - both simple diy operations. That said, the earlier magnetos use a points set up in which the moving point has a tendency to bind on its pivot causing poor contact between the points faces. That does require the removal of the flywheel ; maybe a job for the “ specialist” that you used to clean the carburettor.


Jon Taunton Tue, 31/08/2021

Removed points and cleaned them up. Refitted and reset to correct gap. Now working better than before it broke down.

Thanks for the advice