I wanted to pick people's brains before I attempt to fix. I have a qualcast commodore with a suffolk engine. Which did run really well one of the best I have come across.
The last summer I noticed it struggling / sputtering under load when the mower is climbing the incline of the lawn. I noticed the spark plug cap was in poor shape so thought I had found my problem. Soldered on a brass spade connector which has made some improvement. But still is hesitant under load. I have also tried adjusting the carb which has made no difference.
Has anyone else experience similar? It idles really well. I can rev the engine no problem.
Do people think it is fuel or ignition related?
I wondered if it needs a carbon decoat?
Just wonder ed if anyone has any suggestions before I tackle it.
I was going to try cleaning the points first. And then the carb.
If that does not work will decoat and lap valves.
It has the usual problem of throwing oil out of the engine breather so will tackle this too. Does anyone think this could be the issue. It makes a certain note out of the exhaust when it struggles.
Thank you for your help.