maching 3 cly. outboard pistons????

[delsol]

hi i want to redo my power head my self. i tore down motor about ready to remove pistons. need flywheel removal tool. 2 piston have scored the block . should i get it bored 30 -60 over and get new piston 3 instead of 2 . where would i find a michine shop. can i use a car machine shop. the engine is really clean execpt for the scoring of 2 clyinders. thoughs and input please.
88-89 80 h.p merc

 

[phatmanmike]

Re: maching 3 cly. outboard pistons????

use a mchine shop that deals with 2 strokes. 2 stroke blocks are way different than 4 stroke blocks ,but hey, its your motor.

 

[delsol]

Re: maching 3 cly. outboard pistons????

if your cly is scored, i see they sell over sized pistons. i can have them bore 20-40 over if i had to right..found the flywheel tool on ebay and online 25+ship about 50 @ dealer. also if scoring is bad i would need to have sleeves put in right or get different block.
bob

 

[delsol]

Re: maching 3 cly. outboard pistons????

is thier a place online to ship block to to have bored to certain size for pistons?? can i send bare block???

 

[Bob_VT]

Re: maching 3 cly. outboard pistons????

Check the motorcycle repair shops and find out who does the 2 stroke work. They usually know who can handle 2 stroke boring and sleeving.
Try to stay as local as possible just in case there is a problem.

 

[delsol]

Re: maching 3 cly. outboard pistons????

thank you great idea

 

[Bob_VT]

Re: maching 3 cly. outboard pistons????

2 strokes must be checked to see if they are out of round and you need only bore the bad cylinders. You can replace 1 out of 3 or 1 of 6 .... only replace the necessary piston and that will not impede your performance. Napa has pistons for a merc.

 

[rodbolt]

Re: maching 3 cly. outboard pistons????

check with Ron at Rons marine in portsmouth VA, he does all my boring and sleeving and ships UPS.
if 2 scored odds are high the third is damaged. carefully check any pistons as the skirts like to collapse after an overheat.
most of those parts should be avalible aftermarket. let the machine shop bore it before you buy pistons. most merc pistons stop at .030". modern pistons dont vary much but still should be checked for proper fit as should the ring end gaps. the bore can be done without the pistons. if the piston dont fit send it back.

 

[lilmandavis]

Re: maching 3 cly. outboard pistons????

agree with the bolt. but make sure you prefit the rings with out the pistons so you dont cram an oversized ring into the bore. might as well do all three now than one more later. inspect all bearings for signs of failure also.

 

[delsol]

Re: maching 3 cly. outboard pistons????

thanks great help