Archive through February 25, 2013

[lpalma]

Bill J.

Those pan heads are a real pain to get off.
I have a handy tool called a nut splitter.works great every time.You can still reuse the pan heads.As for the harness, the 1x6 1x7 tend to fade up by the v/r, most times all the wires look same color, crumbly.

 

[mmasheris]

David S that blower is for a lawn tractor 76 style

 

[digger]

Bill J.
There are color coded wiring diagrams in the wiring diagram section.

 

[thoffman]

Bill "J",
Don't cut the nut off! Try to spray the crap out of it with a good oil and let it rest for a bit, a day is good. Befroe trying to remove wack it a few time, but beat it to a pulp. Then try getting on it with the proper screwdriver and attach a vicegrips plires to it for good leverage.

If that doesn't work CAREFULLY grind the top part of the screw off. You should be able to get on it with the vicegrips now.
And if that doesn't work.......then out comes the drill and E-Z Out's.

 

[mfrade]

Don Tanner. You shouldn't use water to test a carb float, it has a different specific gravity than gasoline and water won't travel through the small holes that gas will.

I like to soak a float and even if it won't sink, I'll remove it from the container of gas and set it onto a light bulb. The expanding vapor will be clearly evident if there is a leak. It only takes a minute and is an easy check.

 

[jchamberlin]

Donald Tanner: Larry Carter may be on to something. I was having trouble with flooding on the #30 carb on my 149. I discovered in the Service Manual that there are actually two tabs on a Kohler/Carter float that need to be adjusted. The larger tab keeps the float from tipping up too far allowing the fuel level to rise so high that it overwhelms the mixing tubes resulting in rough idle and a rich high speed mixture. The second tang keeps the float from dipping down too far. The reason for keeping the float from dropping down too far into the bowl I suspect is because the float can get hung up on the bottom of the bowl which keeps the needle valve from seating. The carb is effectively flooding the engine because the gas never stops entering the bowl: these were the symptoms I encountered, and it sounds like the symptoms you're having.

My float was missing the second tang, when I replaced my float, the problem went away. The design of the float has been modified slightly over time. I took pictures of the old and new floats.

Edit: Bill J.: Getting those machine screws out are the test to see if you're serious about working on Cubs.

Seriously, don't make the mistake one of the previous owners of a 1250 I once worked on; the "nuts" are welded to the frame, so no amount of wrenching will loosen them. Penetrating oil and HEAT are typically needed to remove screws.

 

[elincoln]

I check the carb float by setting it in a pan of water and heating it up on the stove. It will start sending bubbles up from the crack/hole. while it is still hot place it on a paper towel and let the preasure push the gas out.

 

[lpalma]

Bill J.

The nuts on a 122 are not welded on so the nut splitter I mentioned or Tom's method works well.

 

[lcarter]

Bill, if you have welding skills you can carefully grind the head of the screw flat and using round stock make a "T" handle. Tack the other end of the round stock to the top of the ground off screw and remove it that way. The heat of the welding also helps to loosen the screw. Of course you will have to replace the screws but I think one of our sponsors sells stainless tork (torq?) style screws (the ones that require the 6 sided star bit). Whatever you do make sure you use anti-seize upon reinstallation.

 

[dtanner]

Mike Frade
you are correct, I should have used gas or acetone. I will have to check that float again. That might be why it works only for a few moments and then floods.

Jeremiah Chamberlin

thanks for that info, I do have two different floats here . I guess I did take to many apart. I just forgot so much . I was 21 when I took a one year small engine course .

Edward H Lincoln

You guys are full of great info. You know I knew there was a way to test a float with water but crs is not helping me .I will redo my test.

Larry Carter

When I took the foot plates off my 147 ,I used my air zip cutter and just cut the screw driver slot deeper and then hit the edges with a cold chisel. The heads popped off. Now I have a torch for those rusted nuts and wish I would ,could have saved them.

No shop in the am , I`am told I have to drive the wife around while she shops .

But I will be out the next day in my shop.