My brother passed and I inherited his collection of lawn mowers that he used for his 1-man show business. The mower in question was loosely covered with a plastic bag and left outside for 2 years in NW Pa. I am in the process of evaluating if I can get it running again and discovered that the piston seems to be stuck in the cylinder. I tried to move it by rotating the blade but it didn't move and I didn't want to force it.
How best to free the piston?
I thought about removing the spark plug and spraying some 10w30 oil in the cylinder or using some PBlaster but not sure if that will cause any damage. Thought I'd ask the pro's who probably have run into this situation.
He also has a similar mower with a B&S engine in the same condition. Both mowers have the correct amount of oil in them.
BTW, AFAIK, the mowers ran before he 'shelved' it.
Any guidance appreciated. Thanks