Hi all, cool site!
I have a problem with a Rover Regal mower. It starts OK runs for period of time, then dies. May last for 15 minutes, but the operating time when started hot is definitely less. Seems to get quite hot, but don't normally handle the engine directly, so just guessing about high temperature.
The possible cause.... My son overfilled the engine oil by about 200ml (800 vs 600ml) last oil change, wondering if too high an oil pressure could have broken something inside? The engine spins freely, no strange mettalic noises when running, and starts first time when cold.
The odd thing, took the cover off the carburettor, throttle controls the butterfly with a spring arrangement, not too sure how this works, but it works fine. But when the engine dies, the throttle butterfly is forced WIDE open and will not move freely at all, and stays that way for a period of time, thens frees up of it's own accord. Mower will then restart (but with more difficulty than when cold, and run again, then dies agains, and the procedure starts again.
So, possible causes IMO FUEL maybe the cap was on too tight, causing a partial vacuum and fuel starvation, AIR filter not allowing enough air into the mixture, filters are old, and I am about to replace them or SPARK, just put in new spark plug, with no improvement. There is not much else is there?
Interesting, just ran the mower with NO air filters and the fuel cap very loose, and it ran and ran and ran. But with no load on motor, no cutting grass. So I am going to go now and replace filters and spring (seems a bit slack) and see if this fixes the problem.
Just wondering if you have experienced this type of intermittent stalling before, and have any ideas what may be the problem?
Thank you in advance for all your help.
David
