jd 300 walbro carb

[jesse8931]

What is the correct settings for this carb and does some one have a diagram of the carb ? also the chain case is missing a few bolts what oil should i replace with and how much ? thanks

[jesse8931]

its the WDB-31 carb btw

[harleysportster]

its the WDB-31 carb btw

The book I have states your 300 should have a WDA-31. I don't know the difference. Look at the underside of the plastic engine cover, the tune-up specs could still be there. The chaincase should have 30w oil 1/4in. below the large bottom rubber plug.
I found this. http://www.angelfire.com/pa2/snowbolens/tuning.html
Carb Service manual, http://www.vintagesnow.com/Mercury_file ... %204-a.pdf
See page 25
Hope this helps,

[jesse8931]

thank you very much I have decided to go ahead and rebuild the carb. Also I have read about the seals going bad but my sled runs ok and seems to have good compression how would I check to see if the seals are bad.

[JDT]

If there is any doubt as to the condition or age of the seals, change them.

They will cost you less than $10 and the 300 Kohler is the easiest engine to change seals on.

[jesse8931]

how would I change them

[JDT]

You need a clutch puller and a flywheel puller.

It sounds like you need to reference a service manual also.

The seals can be changed without removing the engine as the kohler design is differnt than most engines.

Also pay close attention to the o-ring behind the fan housing.

[harleysportster]

how would I change them

I am not sure if you need to split the crankcase, others will problably chime in but before attempting to change them, buy a service manual for your model sled. See the link below. You may also find one on Ebay. You will need a clutch puller and a hub puller to remove the flywheel.
http://www.jdsleds.com/community/viewto ... ?f=4&t=225

[jesse8931]

I pulled the carb and found that the pulse hose was cut and had an hole so I replaced it and will see if that fixes the issue tomorrow