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Hi all,
Have a very old Toro 21" rear bagger Model number 26623. It's not been running well, and today quit completely amid lots of smoke! It's not seized, there is oil in the crank case, and it will start and run for a short period of time after a shot of carb cleaner. I took off the fuel lines and the fuel filter, and both had bits inside. I intend to replace both lines and filter, but feel that given what I've seen the carb will probably have junk in it too. Does anyone have a step by step to removing the carb on this machine, or can point me on the 'net to somewhere that does? Thanks...any help would be appreciated.

Go to this site... : Small Engine, Lawn Mower, Snowthrower Troubleshooting, Repairs and Safety
In your engine type scroll down till you spot your carb... that should link you to a step by step, how to ... :smile:KennyV

Thanks KennyV,
Strange...I went to the site and couldn't find the carb. When I looked more closely at my carb it has Mikuni on it, and a stamp on the engine that says made in Japan. Perhaps this is NOT a Briggs and stratton engine? Altho the fuel filter says B and S on it??
Also...I removed the valve cover and the oil inside smells very burnt?? Any ideas anyone?

Post up the B&S engine number/type and any name/make/numbers on the carb, if the oil is burnt as you say, it could be the ring's. need doing. you can always do a compression test.

Thanks Engineman,
Unfortunately there is absolutely no numbers on the engine anywhere, only "Made in Japan". The carb. has "Mikuni Corp." on it but no numbers.

Is there anyway of taking a few photo's and post them up here.

Is it this Parts and Diagrams for Toro Consumer 26623, Lawnmower, 1991 (SN 0000001-0999999)
found it using your toro model detail

Here's pics of the carb.

Thanks pugaltitude,

Yep. that looks like the carb.

Copy the pic from the above post site and take apart the carb starting from 24 and remove bowl, next remove bowl float 28, needle 29, remove 32 clean out 21 with carb cleaner and all hole's that you can see, making sure that 21 is clean, use cleaner down the fuel inlet, repeat until you are happy then refit all parts.
and make sure seal 30 is in good order. when you put nut 24 back on, don't over do it.

if you damage part's 13 or they're are, repleace them.

Thanks Engineman,

All done, plus replaced fuel lines and filter, and changed oil for good measure. Just about to see if it will start!!!!:laughing:

BTW, does anyone know what the compression should be on this mower?
Thanks

I don't have a manual on this one, but would say somewhere around 120psi would be fine.

:thumbdown::thumbdown::thumbdown: Well....all back together, new fuel, 30 weight oil, new fuel filter and lines. Will start but runs like the choke's on, and then dies. After two pulls to try and restart, the plug is soaked. New plug? It's the only thing I haven't changed, but it seems to be a fuel problem still :-(
BTW, thanks for the help and your patience with this....what do I do now??:confused2:

Did you do the carb..?

yep...as per your instructions and the diagram. Perhaps the carb needs to be adjusted or I somehow didn't hook it up correctly....seemed fairly straight forward but......

And what about a good spark, try a new one just to see if that would work, and recheck th carb. did you do a compression test in the end, and what was it.

No...didn't do a compression test yet....that will be next on my list. I'm thinking that maybe I did something wrong when I re-installed the carb.....maybe something is loose and sucking air....anyhow I'm going to take another look and make sure the choke lever/butterfly is working as it should, and that all lines are tight. the gaskets all looked good but maybe I should have changed them anyhow. I'll try a new plug as well.
Cheers

If the float is set too high you can run rich... :smile:KennyV

Thanks KennyV,

All I did was remove the float jet and clean it....made sure the hole was free from obstruction, and then re-assembled....how do I alter the setting??

There should be a tab on the float, where it contacts the needle valve, a slight bend at that point will have a big effect on fuel level...
I'm assuming that the carb is similar to the illustrated parts break down that, pugaltitude linked in post #7....
BTW when bending the tab, Do Not apply pressure to the needle & it's seat... :smile:KennyV

I've disassembled and re-assembled everything....doesn't seem to be anything untoward. Now, the mower starts, and immediately revs extremely high for a few seconds and then dies. Any ideas??
Thanks.

trooper1954 said:

I've disassembled and re-assembled everything....doesn't seem to be anything untoward. Now, the mower starts, and immediately revs extremely high for a few seconds and then dies. Any ideas??
Thanks.

Click to expand...

Check your carb linkage, especially the governor linkage.
There should be a small spring that pulls the throttle wide open, and the governor should counter act that springs pull once the engine starts... :smile:KennyV

KennyV said:

Check your carb linkage, especially the governor linkage.
There should be a small spring that pulls the throttle wide open, and the governor should counter act that springs pull once the engine starts... :smile:KennyV

Click to expand...

Hi KennyV,

Both linkages look fine...there is a very fine spring on the rear linkage that hooks into the same hole as the linkage itself. Is that right? If so, all seems to be well but the problem remains:thumbdown:

This should be your governor linkage... : Parts and Diagrams for Toro Consumer 26623, Lawnmower, 1991 (SN 0000001-0999999)
Is everything looking correct?
You might try the governor adjustment that EngineMan posted in this thread: http://www.lawnmowerforum.com/small...07-0122e1-governor-adjustrment.html#post71515

Post back with your results... :smile:KennyV

Yes...it looks exactly as shown. I've attached a few pics. Don't want to try messing with the governor in case I take on more than I can handle.:frown:

Just a thought
Is it possible that I've put the fuel filter back the wrong way round? When I blew air through it from either side the air passes through, but perhaps that doesn't mean it can work in either direction?
Thanks....still struggling with this:thumbdown:

Just two more questions:smile:

1. Which end of this fuel filter should be towards the carb? Not very clear in the diagram

2. Does the break in the nipple attached to the gas tank explain my problem?

Thanks

Pic is not that clear, but I say that bottom right should go to tank, and yes you do have a problem with the tank outlet, if you can't fix it by replacing it, you would have to fit new tank.

Thanks Engineman,

At almost $60 for a new tank I don't think I'll be replacing it. It seems a shame after all this effort but that's life I guess. Thanks everyone for your help...I'm off to the dump!!!

Am sure that it can be fixed with a hotgun if you take you're time at it. I would have a go before I'd bin it.