I picked up another Rover Super four with a Briggs 5hp I/C engine for spare parts as my current machine seems to have a possible worn engine.
My current engine on my Super four has a aluminium cool bore cylinder which has score marks but runs fine except when cutting high or thick grass. I suspect that either the rings or maybe the mixture needle may be worn as I can't seem to adjust the mixture much from a closed position. Anyways I managed to pick up another machine cheap this weekend that was a non starter with a 1984 I/C engine and figured it should have a better smoother cylinder than the older cool bore or at worst I could use this needle as a replacement as this part I can only source for $60.00 plus shipping from the states.
I managed to get the I/C engine started as the stop and choke leaver was upside down so you have to start it in the stop position which is why they said it was a non starter. The cylinder on the I/C engine seems good with the faintests of lines you can't feel that don't even leave oil tracks, so it should houne out very easy but it seems to have low compression which I will check again once I lap, adjust the valves and replace the head gasket. I figured considering the condition the engines In and the fact that it's an I/C series that maybe for $30.00 I should replace the rings while the engines off as it's now 36 years old and most likely needs a good service, plus I can make one good engine out of the two. So my question is what rings do you put in a cast iron cylinder? Steel or chrome as the parts diagrams states the two types so I'm guessing there's two options, what are the pros and cons? Std steel # 393835 Std chrome # 298982
Any info or advice would be great as I love this "little" machine plus its the only mower I will let the wife use if she needs to as I won't let her use the SB 45 or the ride on, Below are some pictures of the parts machine I picked up with the I/C engine my complete Super four is in the shed which I will dig out in the next few days.
