I have a '71 1150 115 SN 03027266 that needs two cylinders bored .015 oversize. I miced the cylinders with a bore gauge and found them to have .003 variation from bottom to top. (2.872 - 2.875) Is this factory or is this just wear. My service manual talks about taper but not to specifically...
I have a '73 1150 115 SN 3027266. I'm replacing 3 pistons but using the other 3 pistons and reringing them. The new pistons come with the 2 ring design, can you rering the 3 original pistons with 2 rings or does the rectangular design cause it to need 3? Since the new pistons only had 2...
I'm doing an overhaul on my motor and I've noticed that several different piston part numbers are applicable to my motor. Can you use a 2ring piston to replace a 3 ring piston and what would be the disadvantages of this? It's a '73 1150 115. SN3027266
I'm replacing 3 pistons on my '73 merc 115. I looked up my part numbers with a part finder on a website and it's showing me a 2 piston ring kit. Is there a difference between the 2 ring kit and the 3?
Apparently the top 3 cylinders got hot cause all 3 look the same way however the 3rd piston's rings stuck and scored the inside of the cylinder and the outside of the piston. I looked in the cylinder and it's minor scoring and can be honed out however the piston, I believe, definitely needs to...
Got a '73 115 mercury thunderbolt that's been in saltwater. There's a lot of corrosion inside the waterjacket. I have the block off replacing the piston rings and I need to hone the bores. Before I do, I'd like to get rid of that corrosion. Can you like fill a trash can up and let it soak or...
Well, like the title says, got a 115 inline 6 motor with no compression in cylinder 3. And also, as my name suggests, I'm a fool of a fisherman for buying this boat without checking the compression first. The guy said it needed a new starter (which it does), but it ran fine before it went out...
