Two years later and I am only now getting around to doing some work on the Rover Heavy Duty. It has done a fair few hours work since then. The starter is getting sluggish and it is near impossible to turn over manually with the recoil, so instead of forking out over a hundred bucks for a new starter I think I will just put a new engine on it. The Honda G400 had always been too big for it, as it was mounted on a slant with the belts running crooked. Although they never ran off, I am sure the extra wear on the belts almost halves their life. I might put a cheap 7.5 HP on it. Give it a new coat of paint (the original older model was an industrial yellow, similar to a John Deere yellow, not blue!). Yellow up to about 1970-71, then blue. I am not sure if any of these Heavy Duty made it into Rover's "red era". Then fix up the sulky. Will post some pics once the job is complete.