Mountfield R28M Ride-on-Mower Mistake? Any tips..?

sujsuj

This is what happens when I removed spark plug and rotate key...what point I need to stop doing this..? when it will be enough oil out of chamber..? 
https://www.youtube.com/shorts/TRLDWNcnpj8

sujsuj

https://www.youtube.com/shorts/TRLDWNcnpj8

ThisIsWeird

(head falls into hands. sound of gentle sobbing...)

No problem, SS - of course this is new to you, so is a big learning curve. I'll try and keep my hair on

Ok, you are 'cranking' that engine for how long each time? Yes, around one second. For how long did I suggest you should do it for? Around 5 seconds.

Hair...hair...hair...

Why is a good 5+ seconds  required? Because that will get it spinning as fast as possible, and will encourage oil that's loitering around the plug hole to be expelled.

So, please, give it at least one darned good spin.

A useful video clip would have been aimed at the plug hole, so we can see how much oil is still coming out.

Have you bought a new plug? No? Have you properly cleaned the existing one with a blow torch? No? In that case, do not bother replacing the plug as it almost certainly ain't going to start until you do one or the other.

ThisIsWeird

To answer your other Q, yes, the cylinder does need to be lubricated with oil, but this is done from the other side of the piston, which is open to the crankcase, which is where the oil is stored. There should be no oil above the piston, which is where the spark plug lives.

When the engine runs, the rotating crankshaft sprays oil everywhere inside the crankcase, and this includes the cylinder, but the piston has sealing rings around it, so it scrapes that oil back down into the 'case every time it moves downwards. That's enough to lubricate the piston against the cylinder, tho'.

Oil (other than a tiny trace) mustn't get past the piston rings up to the combustion side, tho', or else it'll risk oiling the plug, meaning it'll stop working and will need regular cleaning. 

After some years, the cylinder and piston rings will wear (especially if the oil isn't renewed regularly), and that will then allow too much oil to get up to the combustion chamber, and a symptom of this is a blue smoky exhaust. 

So, there ideally shouldn't be any 'oil' getting to the combustion chamber. 

molerat

ThisIsWeird said:
You have removed the rocker cover (these are 'rockers' you see under it) and, yes, there should be oil under there - it is sent up from the engine, and what keeps it lubricated. Don't clean  that oil up. Check that the sealing gasket on that cover is undamaged, give it a smear of oil, and put the bludy thing back on. Wipe the outside clean, so that any future leaks from this cover will show up and you can sort it. 

That ship has sailed looking at the pictures

I would use a "Kelloggs" gasket but that may be beyond OP's capability.

This seems to be the gasket needed, needs to check engine type - a bit expensive ! https://www.ebay.co.uk/itm/193268421303?hash=item2cffb212b7:g:xc4AAOSwh0Bd~8zO&amdata=enc:AQAIAAAA4HHWcJN46a3tPxxyzPmtsGB5HGqyAMIrE3VDah3oOyDz15X/ycFFxLVvwvNtbBJDvzqgKZSjiShYE8Cpil/2wO6VU5at2OaZkX7M3KFZumq4Sr1tD+X3TXIlW7nowQcz29ch+f/s5gEDH5ojrx6CsALJHSwPQ3N8lf6irBWeKzX5MoeW5kxd4yH8qOvtD7x8t5EPMDDZGqQWQDi0Ni9cwTv5UNsO9IM9MvPREhnjlUtx4pz8MqYqiOYN0Rkm0dQYMaQJ0nRhWU090dbWAroqTyrWTKX5P9MjwmNBN69v7fqB|tkp:Bk9SR8bv4uaFYg

sujsuj

Video from spark plug hole while cranking for 5 sec...
https://youtube.com/shorts/qFnkgW0vKIg

sujsuj

https://youtube.com/shorts/qFnkgW0vKIg

stuhse

Thats good, put the spark plug back in and see if it cranks over ok.

ThisIsWeird

Cool. Now, the next vid should be of the mower as you fire her up, and with you and mower disappearing in a plume of choking blue smoke.

C'mon - you owe us that :-)

ashe

ThisIsWeird said:

 with you and mower disappearing in a plume of choking blue smoke.

I can envisage this happening but not quite in the way you meant