150cc Starter Clutch Nut Removal

[Fox]

I just rebuilt a 150cc engine. The starter clutch is held on by a nut like this:



They make a special tool that works with an impact to remove it but they are $30 shipped.
www.scrappydogscooters.com/125_150_4-STROKE_PARTS.html

I was in a hurry and I'm a cheap-ass whenever possible so instead I used a pipe wrench to remove it. It's reverse(LEFT HAND)threaded. Once I had the cylinder and piston removed, I used my big fat Phillips head screwdriver through the connecting rod and two wood blocks to immobilize the crank without damaging the engine cases. Then I strapped the engine down with a ratchet strap so it didn't move and the nut came loose with the pipe wrench. I tightened it with the pipe wrench as well. You really don't have to crank it super tight. The pipe wrench made some chew marks on the nut but it was still okay. Just watch that the wrench doesn't slip cause you don't want to damage the case edge where the gasket seals or tear up your knuckles. Why they don't just use a hex nut there is beyond me. It's not a clearance issue.
Go China!

Loosen:


Tighten:

[speedy1125]

Oct 18, 2011 21:23:26 GMT -5 Fox said:

I just rebuilt a 150cc engine. The starter clutch is held on by a nut like this:



They make a special tool that works with an impact to remove it but they are $30 shipped.
www.scrappydogscooters.com/125_150_4-STROKE_PARTS.html

I was in a hurry and I'm a cheap-ass whenever possible so instead I used a pipe wrench to remove it. It's reverse(LEFT HAND)threaded. Once I had the cylinder and piston removed, I used my big fat Phillips head screwdriver through the connecting rod and two wood blocks to immobilize the crank without damaging the engine cases. Then I strapped the engine down with a ratchet strap so it didn't move and the nut came loose with the pipe wrench. I tightened it with the pipe wrench as well. You really don't have to crank it super tight. The pipe wrench made some chew marks on the nut but it was still okay. Just watch that the wrench doesn't slip cause you don't want to damage the case edge where the gasket seals or tear up your knuckles. Why they don't just use a hex nut there is beyond me. It's not a clearance issue.
Go China!

Loosen:


Tighten:

the tool for the wheel brearings on ford broncos looks like that, i have often wondered if it would work. if it does it could be rented, but i like this idea better

[stepthrutuner]

Where there's a will.... there's a way.

That old pipe wrench is what fascinates me.... looks old anyway???

Looks like something from an oil rig. Real heavy made.

[Fox]

That wrench belonged to a piping engineer that helped build the Alaska pipeline. I like that wrench. It has a little pivot point with a rivet through the handle. I got it from working for his widow in lieu of payment. I got a lot of my tools from her/him. There's some tools I never even knew existed before I looked through his stuff.

[stepthrutuner]

I knowed it were special. I gots an eye fer winche er wrenches. :confused: