Reply To: Ransome Mastiff 30”

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#41782
wristpin
Participant

16 thou is correct but it was always important to make sure that the the points faces were flat and square to each other for a setting that would “last the season”. I remember having to go out to Mastiffs that had lost their spark mid season .
Bad news that the carb is in a mess. Hope that it’s not too worn and drawing air around the spindle.
A problem with old Mag engined Mastiffs was to get them to idle ( tick over) low enough to disengage the centrifugal clutch to allow clean engagement of the gears. The original Mastiffs had a slow revving JAP engine and a MAG in good condition was just about slow enough but needed to be “ about spot on” to disengage the clutch and then not bog down when the throttle was called on to move off. A Kohler conversion sold by the then UK Kohler distributor was never happy – just would not idle slow enough. So let’s hope that you can sort the carb; may be worth giving the lump a valve job while you’re about it.
I can’t vouch for it, but something tells me that Ransomes offered a set of stronger springs for the clutch – but it was a while ago !
Let us know how you get on!