My VC500 lawn mower has just recently started becoming hard to pull start. It has the VSX160 power torque motor. I removed the decompressor diaphragm thing (not sure what it?s called) and the pull start works easy. I sucked on the hose nipple of the diaphragm and the piston pulls in and stays in OK while I keep the nipple blocked. I replaced the hose from the diaphragm to carby with a clear hose I had. Didn?t make any difference. I noticed the original hose had a white plastic plug ( with a small hole through it ) in it at the carby end, is this a check valve? I think I might have lost the ball bearing in front of it if it is. Could someone offer some guidance? Could I get an assembly picture of the carby diaphram set up. The mowers throttle would increase by itself while mowing too. I would really appreciate some help.
Thanks.
