Hello Forums. This is my first thread to iboats. Applause please!
I'm rebuilding a 1989 Mercury 60HP. Piston #1 burnt up. I disregarded the warning beeps because I didnt know where it was coming from, very stupid I know. First time boat owner..lesson learned! The top carb was bone dry and I believe my water pump failed.
My quesion is whether or not to reuse pistons 2 aqnd 3 they appear to be in very good condition.
I've ordered OEM rings (3ring pistons) for #2 and #3. I'm installing new needle bearings on the wrist pin for all pistons and reinstalling the same end cap bearing and cage as they appear in excellent condition.
Compression prior to disassembly measured 1-60psi, 2-80psi, 3-82psi. Now I know those seem low but I manually pulled the flywheel with a makeshift pull rope. and probably on got 2-3 cycles.
All three pistons had the same wear pattern. A picture is provided below.
I'm trying to keep the costs low on this rebuild but understand that as long as its open to replace anything suspect. The reeds appear to seat very well. Overall the crakshaft area was surpringly very clean, like new surfaces everywhere.
The wear marks are surface and you cant feel them. I have not mic'd them but assume they are true I'd like to save the $225 cost of having 2 new pistons shipped out.
Thank you!
Korbs67
..well it looks like my new account wont let me post a jpg yet. So what might I consider to be telltale sign that I should just go with a new piston??
I'm rebuilding a 1989 Mercury 60HP. Piston #1 burnt up. I disregarded the warning beeps because I didnt know where it was coming from, very stupid I know. First time boat owner..lesson learned! The top carb was bone dry and I believe my water pump failed.
My quesion is whether or not to reuse pistons 2 aqnd 3 they appear to be in very good condition.
I've ordered OEM rings (3ring pistons) for #2 and #3. I'm installing new needle bearings on the wrist pin for all pistons and reinstalling the same end cap bearing and cage as they appear in excellent condition.
Compression prior to disassembly measured 1-60psi, 2-80psi, 3-82psi. Now I know those seem low but I manually pulled the flywheel with a makeshift pull rope. and probably on got 2-3 cycles.
All three pistons had the same wear pattern. A picture is provided below.
I'm trying to keep the costs low on this rebuild but understand that as long as its open to replace anything suspect. The reeds appear to seat very well. Overall the crakshaft area was surpringly very clean, like new surfaces everywhere.
The wear marks are surface and you cant feel them. I have not mic'd them but assume they are true I'd like to save the $225 cost of having 2 new pistons shipped out.
Thank you!
Korbs67
..well it looks like my new account wont let me post a jpg yet. So what might I consider to be telltale sign that I should just go with a new piston??