JD TRS 27 snow blower flooding

[jwales]

This blower has an 8 hp Tecumseh. Throttle and choke plates were so gummed up they would hardly move. pulled carb off, dis-assembled and ran through the Ultra sonic several times and cleaned up well. Everything is back together and it starts up great but even after it has warmed up I get surging/hunting at full throttle. Not real bad but noticeable. The hi speed jet is in the bowl nut so I made adjustments set at (1.25 turns and turned out to 2) to stop the surging, then brought the thropttle throttle down to around idle. That seemd seemed to work well. Then I brought it up to full throttle and it hesitated, back fired black smoke and quit. Started back up on full throttle and ran good. brought it to idle and ran good then back up to full throttle again and hesitated, backfire black smoke and quit. Seems like it is flooding out. I also tried adjusting low speed/idle (intial setting at 1turn)with the hi speed at 1.25 with surging. Could not get rid of the surging.

So I am thinking I need to open up carb again, look at needle, seat, float adjustment, clean jets again and then try it with initial jet settings. Anything else that comes to mind??

Thanks, Joe

[Gerry]

I would check the float level with a number 4 twist drill bit. And don't forget the indented part of the fuel bowl is to be on the fuel inlet side.

[38racing]

maybe do a static adjustment on the governor.

[jwales]

Just an up-date. replaced needle and seat and adjusted float w/ 11/64 drill bit and it roars like a lion.... Now it will sit and wait for the white stuff to pounce on.

[38racing]

When you use 11/64 drill as per manual did you find nose of float is below level with carb inverted?

[creia]

When you use 11/64 drill as per manual did you find nose of float is below level with carb inverted?

I have, on every one I have ever set. However, they always seemed to run right that way.
Michael

[jwales]

Yes. Same as Michael says. Everyone of them.