Clean up that carb

[SwampmanLA]

I got hold of some bad gas a couple of weeks ago (water) and my 422 with the Robin was not liking it. Well I just want to say that that carb is so easy to clean it was almost fun. And after putting it back together and mowing a little, the Robin has never run better. So for all the Robin haters out there maybe you need to clean your carb.

From the Swamp

 

[coolconnection]

I know nothing about this engine. I have the 425 so let us know what you did and how you did it.

 

[BobRip]

I know nothing about this engine. I have the 425 so let us know what you did and how you did it.

Did you replace any parts? Pictures? How much carb cleaner? What was particularly dirty? What did you have to take apart? Did you pull the carb off the engine?

 

[BobRip]

I pulled my carb today and cleaned it. I damaged the gasket between the engine and carb and had to order another. I will be down for two days!! OMG!

It was easy to remove, disassemble and clean. I hope it runs better.

 

[Phils]

I had a problem 'in the field' some years ago on my 422 and disassembled and cleaned the carb there. I didn't pull it off of the manifold, I just removed the top so I could access the float and bowl. It was easy EXCEPT for the fear of dropping a screw or needle valve or spring in the weeds. I worked VERY carefully and whatever the problem was, cleaning fixed it.

Too long to remember but it was either a stuck float, crud in the needle valve, or crud in the shutoff solanoid, or something else that cleaning the carb fixed.

That was early on when I was still pumping that white goo from the tank through the system.

Phil

 

[MuncyBob]

Did mine earlier this summer. Easy even for a carb novice like me. My problem was the engine surging...none of the easy fixes worked. I was afraid of ruining a gasket but just took my time and all went well. Runs like new now! Took about an hour for me and all I used was 1/4 can of carb cleaner. Replaced fuel filter was I was at it too.

 

[BobRip]

After the rebuilt yesterday, I started it right up on first try. Before, I had to crank with choke off first, or it would flood. Then I would crank with choke on to start.
So it starts better hot and cold.
I found a screw with a spring on it on the left front of the carb. Prior to rebuild, I found it fully turned in. I left it partially open and noticed gas coming out near the bottom of the engine when the tank shutoff was opened. Evidently it drains the carb through a tube leading down. I could not start the engine initially until it was closed. I could not find this in the manual. But now you know.

 

[stray]

Did mine earlier this summer. Easy even for a carb novice like me. My problem was the engine surging...none of the easy fixes worked. I was afraid of ruining a gasket but just took my time and all went well. Runs like new now! Took about an hour for me and all I used was 1/4 can of carb cleaner. Replaced fuel filter was I was at it too.

I had this problem. Seems like I took out one or two screws down side the carbrator, blew out with an air nozzle and that cured the engine surging. the engine surging WAS quite annoying.

 

[J_J]

After the rebuilt yesterday, I started it right up on first try. Before, I had to crank with choke off first, or it would flood. Then I would crank with choke on to start.
So it starts better hot and cold.
I found a screw with a spring on it on the left front of the carb. Prior to rebuild, I found it fully turned in. I left it partially open and noticed gas coming out near the bottom of the engine when the tank shutoff was opened. Evidently it drains the carb through a tube leading down. I could not start the engine initially until it was closed. I could not find this in the manual. But now you know.

That tube and screw is used to drain the carb, like when you get water in the bowl. I wish Kohler had that set up. I have to loosen the nut on the bottom of the bowl to drain. I think Honda had the bleed screw also.

 

[BobRip]

That tube and screw is used to drain the carb, like when you get water in the bowl. I wish Kohler had that set up. I have to loosen the nut on the bottom of the bowl to drain. I think Honda had the bleed screw also.

Thanks J_J, that was my guess, but it sure is nice to have confirmation.