Pre 1965 Mountfield M1 tiller

Hi everyone, can anyone help us.

We have a pre 1965 Mountfield M1 Tiller, but we do not know what the engine is.

It looks very like the one in the photo that Taildragon posted on the 14th June 2007. (taildragons second post of the one from e-bay)

Except that on ours, the petrol tank sits at the back of the engine and between the engine and the handlebars.  

There is only 1 lever on the handlebars which controls the throttle.

Also between the handlebars there is a pull up/push down lever, which moves the engine back and forth to engage the pulley wheel which has a two belts.

Will get a photo and post it as soon as I can, to see if anyone can help.

replace engine with a Honda if you are serious about using it to work your allotment

you have the tecumseh version of the aspera engine. parts will be a bit scarce, but not impossible to get hold of.
i dont think that the welded flywheel will be a problem at all, providing its keyed onto the crankshaft in the right place, which it sounds like it is, otherwise it would not run at all.
you have either a governer fault, a blocked jet on the carb, buggered points/condensor set or a buggered engine.
max engine rpm should be no more than 3000. you MUST make sure you have a full pint of oil in the crankcase. the reason there aren't too many of these around now, is because if they are run low on oil, they will throw the connecting rod through the side of the crankcase = new engine. hell, they sometimes do it even if they DO have the right amount of oil in it.
i would really try to obtain another engine if you can.
points are found under the flywheel don't loose the flywheel key when you take it off!
good luck, if you need some help on the phone with it, pm me with your number, and i will be glad to help if i can.

i seem to have one them but a newer model ,by about 10 years lol .