Puch Maxi

Work began today on the re-conditioning of a Puch Maxi moped.

So far water and stale fuel has been removed from the carb, the carb has been cleaned and serviced, and a spark has been achieved, no thanks to the existing wiring!

However, despite the presence of both fuel and a spark, the machine has yet to come to life, we suspect the cause is water in the crankcase contaminating each fresh charge of fuel… Hopefully the removal of the block overnight and the liberal application of water dispersing products to the crank case will remedy this;

Wiring Diagrams here.

Leyland glow plug and head gasket replacement

When I first purchased the Leyland it was impossible to start without using easy start, not ideal! However after some testing with a multimeter it turned out that all the glow plugs had failed open circuit, this should have been a simple job, but when I removed the plugs from the head I was greeted by this motley crew;

The tractor had been run with dead plugs for so long that carbon had built up solidly round the tips and caused them to break off when the body of the plugs were un-screwed, the only way to remove the stubs was going to be lifting the head…

Once the head was on the bench the next challenge was to knock out the combustion chambers, eventually achieved using a specially curved rod inserted through the injector hole and hit with a hammer;

Once the stubs from the injector were punched out, the remaning carbon deposits were cleaned out using a 11/64 drill, and the head was de-coked and refitted with a new gasket.

Since then cold starting has not been a problem, no easy start required.