Attempting a motor rebuild

[Captndrydock]

IF.. that is the only piston that shows "symptoms" I would remove the carb. / Intake and from that end remove the end-cap of that particular piston/rod.
and see ???

I'm not sure I can pull that off without dropping roller bearings all over! But I think it's leaking a bit at the crankcase halves too, so might be time for a full go through... And really, I'm kinda eager to do a full restore on this motor.

 

[The Force power]

I'm not sure I can pull that off without dropping roller bearings all over! But I think it's leaking a bit at the crankcase halves too, so might be time for a full go through... And really, I'm kinda eager to do a full restore on this motor.

Splitting the block is your route to go

 

[Captndrydock]

Splitting the block is your route to go

Actually, I'm really looking forward to it. And learning how. I have several of these motors and one with a cracked block that I've disassembled and reassembled to gain familiarity. Honestly, it's surprisingly simple. But I don't want to get cocky either, lol...

 

[racerone]

Agreed---Spit the block and inspect / repair as needed.-----Some folks want to save time on short cuts.----But they usually find time to do it over.-----It is simple nuts and bolts work.

 

[Captndrydock]

Agreed---Spit the block and inspect / repair as needed.-----Some folks want to save time on short cuts.----But they usually find time to do it over.-----It is simple nuts and bolts work.

Cool glad to hear it's not overly complicated.

 

[jerryjerry05]

Make sure the machine shop is a good one and has experience in outboards.
What part of the country??

 

[The Force power]

Cool glad to hear it's not overly complicated.

Yup, I've been lucky with all the help on this forum

 

[Captndrydock]

Make sure the machine shop is a good one and has experience in outboards.
What part of the country??

I haven't found one yet or started looking. I have a friend that knows of a machine shop, but I need to get their name. He used to rebuild motors, but not outboards.

Why is it important that they have outboard experience? But yes, that is a concern I already had, I'm glad you brought it up. I'm in western NC.

I figured I gather some names and look into them. Any suggestions for machine shop near me? Or how to identify a quality shop? Right questions to ask them?

I've put the brakes on my diassembly until I gather a complete list of rebuild supplies and places to get them. Also trying to figure out if it's worth replacing the crankshaft bearings. Not sure how to check to make sure they're good enough to re use. It would be about $300 more to replace them. Do you or anyone else have opinions on replacing bearings?

Thanks Jerry!

 

[Captndrydock]

I'm working up a list of parts and supplies and sourcing them. This is what I have so far. Any suggestions of what else I need and/ or where to find them would be much appreciated.


Wiseco 3151P1 wrist pin bearing set x4

FG1019 GASKET SET or.. Same 27-809754A 1 - Gasket Set

OEM bearings

Spring by pass valve 24-F404268 or 20-F85916-1-

waterline seals

F439736 SEAL EXHAUST TUBE F85453-1 GASKET, EXHAUST LOWER

FA523735 SEAL, INLET WATER LINE, LOWER F523899 GROMMET, WATER LINE F84342 SEAL, INLET WATER LINE, UPPER

Reeds Boyesen B245

 

[racerone]

???-----Take the motor apart first !!!-----Inspect all parts.----Then decide on a path forward.----Needle bearings on the rods are usually OK to reuse.----Reeds are very durable and rarely need to be replaced.

 

[Captndrydock]

Make sure the machine shop is a good one and has experience in outboards.
What part of the country??

Btw, I used to live in Atlanta and visit there occasionally. I'm not opposed to driving for a good machine shop. Upstate SC as well, if you know of any to recommend.

 

[Captndrydock]

???-----Take the motor apart first !!!-----Inspect all parts.----Then decide on a path forward.----Needle bearings on the rods are usually OK to reuse.----Reeds are very durable and rarely need to be replaced.

Thanks Racerone, will do. Still I would like to be sure I can source these parts. Pretty sure I can, but still looking.

 

[The Force power]

Thanks Racerone, will do. Still I would like to be sure I can source these parts. Pretty sure I can, but still looking.

The Crankshaft bearings as you were wondering about should be good if the motor only suffered piston/ring damage.
A teardown prior to purchase any parts would be the way to go as it may not need a Re-bore; its all speculation at this point

 

[Captndrydock]

The Crankshaft bearings as you were wondering about should be good if the motor only suffered piston/ring damage.
A teardown prior to purchase any parts would be the way to go as it may not need a Re-bore; its all speculation at this point

Makes sense. I wasn't planning to buy parts in advance. Just looking around at where to acquire them. I've found most of them this morning though. Thanks!

 

[dog22]

from the video, It looks like you might have a broken top ring but you won't know for sure till you dismantle the motor if that is the case your work is easy do a slight hone replace the broken ring and put the motor together using the proper torque values from the manual if you have one

 

[ct1762@gmail.com]

out of 50 "clean" motors I see, i would say 47 of them need a bore job. especially if a cylinder is scored. just did a 70hp 1982 johnson that only had 6-8/10ths of wear, havent seen one that good in ages. but cannot recommend doing it right the 1st time enough. there is nothing like the feeling of confidence putting together a motor you know was done right. a bore and finish hone is $50 a hole at Jay's Block shop in Doyle, TN. hes one of the best outboard machinists in the country. don't mind paying for shipping. dont skimp on honing old cylinders in such a high performance motor like that especially is my advice