The 125 Winter Project
 

It's time to get started on the 125 as my winter time fun. Have run it
now for a couple years and have had good luck but it certainly is a bit tired.
Compression is pretty weak about 60 and she is starting to smoke some
etc etc.
The rear end leaks pretty good. Cork gasket I am sure and both
axle seals as well are quite gooey. There is a lot of gasket sealer in all
kinds of places from the previous owner so no telling where all this will
go.
I found a local machine shop who kinda reluctantly agreed to do the machine
work on the engine for me. I don't actually think he minds he just makes
his living doing big stuff, haul trucks and the like.
I pulled the head and the bore actually looked pretty good except one
big nasty scratch from top to bottom. Darn. First time inside one of these
narrow frame models. Always appreciate the input and all the good schooling
I get from you folks. Don't want to get far down the road before Christmas
as the Grandson will be here and we can explore together,

KenAttachment 109490

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Get the machine shop work done, get all of your parts needed. (Don't about the machinist at the shop that's being done at,
as long as he's doing his job). And have a great time chill'n with your grandson, it'll always be priceless regardless of the outcome.

Is the engine been apart by previous owner? Piston marked? Wondering if a bore will get that damage out?

Take the block and crank to the machinist before ordering the piston and rod. The machinist should tell you what you need. Get the parts into his hands before he does the machining.

This looks like a nice thread to follow along with. You remind me that I have a k241 sitting on the workbench waiting for the same thing :biggrin2:

Will work on getting the engine out and cleaned up for the machine shop
next few days. I will definitely get him to measure it all out before I order
any parts. Yesterday I started on it and next thing I know I have the
meter in my hand and I am tracing all the electrical to see what all goes
where. I am so easily distracted:biggrin2:. That is the beauty of no longer working
on the clock. Am a big fan of putzing along in no hurry.

Ken

Got the engine on the bench yesterday. In pondering getting into the machine
shop, am curious of you alls opinion. Have far down should a guy tear this
apart before getting it to him. Am just wanting to make sure he can do
his job most effectively. Just the tins and flywheel etc, or does a person
hand it to him with everything apart, crank, cam, valves etc all disassembled.
Been a long time since I did something this in depth. Last time was a
66 mustang and I would rather not mention how long ago that was. My
memory has slipped since then. Thanks

KenAttachment 109501

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I would advise taking it to an engine rebuild machine shop rather than “just” a machine shop. They know clearances and procedures and are set up to make a quick job of it. If the crank needs grinding, that is specialty work too, again the engine pro shop. Are you good to fit rod bearings? Valve seats and stem guides. Engine shop unless you want to do that too.

Which ever shop you use will want the block stripped.

Have fun and enjoy the time with you Apprentice.

Good advise.
Last one I did was an K341AQS and the machine shop bill was about $240.
I reassembled the engine myself.

PM me aid I will send you a PDF of the Kohler engine service manual.
Step by step walkthrough of dis and re-assembly of all components. A must have in my estimation.

Your rebuild kit, once you determine what size to order, will include all seals, gaskets, rod & piston plus new valves, I would also opt to the new guides for an extra $20.

All your machinist should need is the bare block, crank, piston and rod.
No need to bother him with any more parts than needed, less stuff to misplace and or loose.
You can deal with the head your self, just search this forum for that process, flattening a head with sandpaper and a flat surface.

He should have the capability to tank, bead blast and inspect the block for cracks etc as well as spec's etc. and be able to tell you what size kit to order.

Got my last kits from this seller on e-bay, look for him. https://www.ebay.com/usr/bakt4kids?_...p2047675.l2559
Be sure to follow his ordering instructions thoroughly.

Good luck!

Thank you so much for the info all the way around. Looking around on
the site last night and ran across the K series service manual. Have read and
printed the chassis manual but never thought to print the one specific to the
engine, duh. If for some reason I can't get it to go I will for sure PM you
for the PDF. Thanks for that and the link to the kits. Off to do some printing.

Ken