[Mark D]

Hi, my Mountfield RV45 has been running fine for years but whilst cutting the grass recently I stopped the engine and when it restarted it would only run slowly, like on tickover. I've changed the plug, cleaned the air filter, carb is clean with fresh fuel, all cables work correctly. Oil was a bit low so I topped it up. Has anyone got any suggestions please? The throttle has choke, fast and slow positions but these have never made any difference to engine speed.
Thanks.

 

[Mark / Ohio]

Maybe governor spring came loose? Here's a picture I found:

Mountfield RV150 / RV40 / RV45 Governor Spring

Brand new, Genuine Mountfield (GGP) replacement Governor Spring for all RV150 + RV40 + RV45 petrol engines that were fitted to wide variety of Mountfield, Homelite, MacAllister, Stiga & Castel Garden lawnmowers.....

www.jungle-busters.co.uk

 

[Mark D]

Thanks for the reply. I've just had a look and the Governor Spring is missing so has broken and fallen off. Replacement cost £3.49. I wish I'd checked my emails before writing off the mower and buying a new one. Not to worry, I now have a spare so my wife can help with grass cutting.