74 110 Helper Spring

1089 Views 10 Replies 6 Participants Last post by ripple_fx1, Oct 12, 2014

jd_430

Discussion Starter · Mar 15, 2012

I'm helping my neighbor with his L120 (might be a LT120, decals are gone) running a B&S 20hp Intek V-twin. It seems to have power but it will pop through the carb once every 30 to 45 seconds and hunts/surges at high speed.(rpms) We've had the Nikki carb off and soaked it for a day in a bucket of carb cleaner, we then adjusted the rocker clearance,(the clearance was way out of spec). The engine seemed a little better after the valve clearance was restored but after a few minutes it was popping again.
Any thoughts?
Thanks
E.

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woodpecker41

· #2 · Mar 15, 2012

If the valve clearance was off for a long time it could have burned a valve. Roger

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jd_430

Discussion Starter · #3 · Mar 16, 2012

Roger,
As always thanks for the reply. I looked tonight at the ID tag. This L120 is a 2004 model. I highly doubt anyone ever had the rocker covers off before me so you are probably right about a burnt valve.
The clearance was at about .011, we re-set it to .004 as this is the spec we found on-line at B&S.
Thanks.
E.

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woodpecker41

· #4 · Mar 16, 2012

Eric that was mostly a guess. Usually valve clearance gets smaller not larger. Roger

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randylbarnes

· #5 · Oct 11, 2014

I put the helper spring in the 110 last night. Is it normal for the spring to sit on top of the cross shaft for the brake or do I have the wrong mounting bracket?

(Message edited by treed on October 11, 2014)

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ripple_fx1

· #6 · Oct 11, 2014

wrong bracket...

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randylbarnes

· #7 · Oct 11, 2014

Does anyone have a picture of the correct bracket???

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woodpecker41

· #8 · Oct 11, 2014

There are pictures of both of the brackets used. You need the year and serial number of the tractor to look at the parts page in www.jdparts.com. Roger

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ed_lincoln

· #9 · Oct 12, 2014

If it has the brake shaft it is either a 73 or 74 with a manual lift. Usually that type of spring is used on round fender and 72,73,and 74 with electric lift.

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Grant Baker

· #10 · Oct 12, 2014

Here is how it looked on a 71 110 parts tractor I got

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ripple_fx1

· #11 · Oct 12, 2014

Here's a link to a thread that contains the installation guide with some pix:
http://www.wfmachines.com/discus/messages/335/316368.html

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