I agree, lets seem some flames!!!!!

I don't...

TOC Admin
Brando

Ok...back to lawn mower maintenance....
It is getting air flow, that's for sure, as I can put the throttle high once I get it started with the primer bulb and it will rev higher....but then it stalls out a lot quicker too...so lack of fuel. Thing that puzzles me is that I've taken this carb apart about 5 times now...

I haven't tried carb cleaner yet though, only compressed air. As I said before, the bowl is full of gas when I take it apart. What passage could be blocked?

TOC Admin
Brando

Hi Brando, all

I've been wondering about your progress.


There should be a small opening in the venturii. It should lead to the jet in the float bowl.

If you blow compressed air in the wrong direction you can lodge an obstruction even tighter. Carb cleaner might help break it up and let it go all the way through.

If the correct amount of fuel gets through and it's mixed with the right volume of air, it will run.

Regards, Norm

OK...UPDATE!

I got it running for more than .5 seconds and no need for the primer bulb. Sprayed ALL the passages in the carb with carb cleaner....did the trick.

Only problem now is, it seems as if the timing is incorrect?
I checked the spark plug gap, it is correct. Gapped the coil with a business card, which I've heard works and gives the correct gauge. The flywheel key has been changed. What else could it be?

Here is what happens. I start it...starts up pretty quickly, but it just doesn't have a consistent idle. I put it on full throttle and it runs for a while, but will stall out unless I put the throttle back down (although sometimes it still stalls). I got my backyard cut...because the grass is pretty much dead back there and there isn't much. The front grass is THICK, and I only got a little bit cut, as when it got to the thicker parts it didn't want to cut it. Is there a key in the blade?

This is a Toro 16793 to be exact.

TOC Admin
Brando

Hi Brando, all,


I've gone as far as I can.

I'll be looking forward to reading about your final fix, as my 15 year old Craftsman started doing the same thing, last Tuesday.

Regards, Norm

This article has helped me a lot:
http://www.eio.com/repairfaq/sam/lmfaq.htm



I did replace the float...so I'll give this a try.



Didn't know this.

This info comes from the Cleaning Craftsman (Tecumseh) carburetors part of that article.

TOC Admin
Brando

I didnt know that lawn mowing could involve so much lol my 16 yr old Craftsman 4 hp mower (complete with a 3 inch long, .5 inch wide hole in the body and the bag is long gone) starts right up. I dont even change the oil since it leaks so much i keep topping it off every month lol.

Hi Brando, All.


Sounds like, if the "O" ring were pinched it would create a vacuum leak.
Your symptoms sound like a vacuum leak.
Coincidence?

Since I have no experience with lawn mowers, I'll wait and see what you find.

Regards, Norm

No, it wasn't the O-Ring being pinched what I didn't know...I made sure that went on right. It was the float needing to be adjusted and also, the deepest part of the bowl facing opposite from the float hinge. I also cleaned the hole in the bolt that holds the bowl on, as recommended in that article, with a tooth pick and carb cleaner...as well as compressed air. She purs like a kitten now. Starts up right away. HOT DAMN!

Weed Eater GTI 15T and Toro 4HP Lawn Mower in top condition!

TOC Admin
Brando

Hi Brando, all


That's good news.

Since mine came on with no warning, I'll look for a pinhole in the float. First I need to find the float.

Regards, Norm

Can't miss it! When you open up the carb, it's the huge ring.

TOC Admin
Brando

Well, I missed it I guess... I have ben really busy and havent been on in a few days. Glad its all working, and if it makes you feel better, the suggestions I would have made were what you wrote above about float level, etc. Sorry I couldnt help, Ill try to be on more often to help out with the lawnmowers.... Norm, I would also look for a bad needle and seat. Invert the carb and blow through the fuel line. If the needle doesnt hold light pressure, the replace it. If you have a thumb pump, just use that. Needle should hold .05 psi I believe. For as cheap as the part is, you might as well replace it while its apart. If you are taking it apart anyway, also remove the main jet (if its removable) and spray it out and blow it all out. I also run a small wire through all the small passages to insure that they are clean. Hope this helps.

Peace!
Andrew

Thanks andrewk,

Regards, Norm