We have a 139cc Rockwell lawnmower, model 'WESCO R4000' series. The valves are looser than I would expect and we think tightening them will improve the engines operation, however we don't know what the valve clearance should be..would anyone know the specs or have access to a manual to tell us?
Thanks,
Bryan.
(Burnie Men's Shed)
Thanks,
Bryan.
(Burnie Men's Shed)