De-Carbonizing

young enthusiest · #1 03-20-2009, 11:43 AM

Maybe someone could post some step by step instructions, stuff to use etc. I could really use the information!

rfrank · #2 03-20-2009, 09:40 PM

Ive actually used sea foam, get it at autozone, advance auto, murrays, krager shucks oreilly. Follow directions. I used some on my old briggs and that thing smoke white smoke for a few minutes after I started it back up. Heck of a smoke show just like it should. You could also take the head off and wire bursh and replace the head gasket. I used chevy upper end cleaner but with that stuff you have to change the oil afterwards.

young enthusiest · #3 03-20-2009, 10:02 PM

I heard about takeing the head off and useing oven cleaner, and a toothbrush...

67hydro · #4 03-20-2009, 10:17 PM

I took the head off and wire brushed mine.I used a cup brush on the end of my drill.There was some pretty bad deposits in there that i had to knock off with a screwdriver first (very carefully!) it turned out pretty darn clean.You might want to check the head to see if its warped,Mine was and I used some 400 grit to sand it flat again,I put the sandpaper on a really flat surface and sanded away!
I have never used any chemicals because I wouldn't know what to use but if there was a chemical you could use Id imagine it would be easier
Jason

young enthusiest · #5 03-20-2009, 10:30 PM

that sound like somthing I could do. I am getting a new gasket, we got some 400, and a sheet of glass. can't be too hard!

Tom S · #6 03-21-2009, 09:10 AM

Sand the end of a wood paint stir stick to sharpen it for scraping. It is safer than a screwdriver. I have a right angle die grinder that I use the small scotch-brite pads on. That works great also. Polishes everything up.

weaverama · #7 03-22-2009, 01:32 PM

Oven cleaner and fine steel wool.

CMA's129 · #8 05-02-2010, 12:45 AM

I went to Advanced Auto to pick up some marvel mystery oil as recomended by my local cub colector and the kid at the counter talked me into buying sea foam that was on sale for two dollars more than the MMO. I mixed it according to the directions for cleaning your valves and it did not do anything noticable on the outside as far as smoking or black crap out the pipe as the young salsman promised. But after running thru the 2 gal. tank of mix I added some fresh unmixed 93 and after about half an hour I noticed a slight vaper coming out of the beather hole and specks of oil on the left front tire. Now Im on about the fourth tank of fuel since the sea foam and she is starting to smoke out the breather enough to kill mosquitos in nieghboring countys, I'm loseing about an ounce of motor oil an hour. Man am I burnt, I'd like to take whats left in the can and dump it down that kids nose. I'll never use it again stick with the MMO!

Merk · #9 05-02-2010, 07:04 AM

The best thing you can do with sea foam and products like sea foam is leave it on the store's shelf. There is no such thing as a quick fix in a can or a bottle.

sea foam claims to be a fuel stablizer. I had a plow day coming up and thought it would be a good place to try it. I took three five gallon fuel containers to that plow day. One had just straight gas from the pump. One had gas and the recomended amount of Sta-Bil fuel stablizer in it. One had gas and the recomended amount of sea foam in it. sea foam claims to be a fuel stablizer too. All containers were marked and filled from the same pump.

The first gas I tried was the container that had sea foam in it. My 149 seamed to be down on power. You could notice the 149 was way down on power after I fill the gas tank for the second time. My 100 would die while plowing on the first tank of the sea foam gas.

Both Cubs were at a plow day the weekend before and ran great.

By now I was asking myself what was the same between my 149 and my 100. The only thing was the gas. I did drain what was left of the sea foam gas out of my 100 and tried the container of only gas. Within a 150 feet my 100 like it did the weekend before. I did drain the fuel in my 149 and tried the gas with Sta-Bil. My 149 ran like it did before the sea foam gas was added to gas tank.

The only gas I had problems with was the gas that had sea foam in it. I did talk to the local small motor shops in my area. None of them had any good comments about sea foam.

I did check Kohler FAQs. Check out the 12th question on Kohler FAQ:
http://review.engines2008.kohler.com...nance/faqs.htm
Question 12 talks about fuel additives and cleaners. sea foam is a cleaner....and a poor one at that.

I would add Marvel Mystery Oil to that group of fuel additives and cleaners too. We had 60 horse power gas tractor that had valves that would stick. MMO didn't add anymore run time to that motor. Head still had to come off every 200 to 300 hours to clean valves.

The best thing you can do for your Cub is to a run a good grade of freshgas, make sure you have a good spark amd do regular oil changes. Adding a fuel stablizer will help too.

Quote:

by CMA's129
But after running thru the 2 gal. tank of mix I added some fresh unmixed 93 and after about half an hour I noticed a slight vaper coming out of the beather hole and specks of oil on the left front tire.

You don't need 93 octane gas if your Kohler motor is a stock. 87 octane works great in my Cubs. My 149 has .040 off the head and my 100 had a total of .030 total off the head and block. Fresh gas (less than 30 days old ) with a fuel stablizer will do you more good than 93 octane gas. Cheaper too.

CMA's129 · #10 05-02-2010, 09:35 AM

I only run the 93 because thats what it says in the manual on page 10. run 93 or no less than 91. I dont know how much my head is shaved because I did it myself buy hand but I had to take quite a bit off to make it flat. Now it looks like Im in for a top end rebuild so when I order the parts Im going to get a new head and restore the factory compresion. I belive it to be a little high now for when Im starting it up it seems to slip the SG belt a little at the top of the stroke. Thanks SEAFOAM!