Utility 300 running rough

DWHEELS

New User
Was brush hogging for about 2hrs,running good then started running rough, thought it was low on fuel. Went to barn was idling ok. Next day change oil and filter,replaced fuel filter, and cleaned oil in air filter. Had a lot of dry grass on air intake. Started tractor up idled ok, increased throttle and started running bad. Wondering if something may got sucked into csrb. Need help.
 
The air cleaner is most carefully cleaned at the pan under the left side of the hood. It can be cleaned and refilled with what ever engine oil used in the engine. There is a square headed plug in the bottom of the carburetor. Use a 2 quart pan, or coffee can, and catch fuel when the plug is removed. The fuel should flow at least a pint every minute, for at least a minute. If it flows fast, then slows to a small trickle, there is restriction in the line. From the hole in the tank, to the float in the carburetor it is possible. There should be no fuel filter, other than he sediment bowl screen, and screen in the line at the carb inlet fitting, a automotive filter, Especially those clear little blobs, are not fro gravity flow.
If nothing in the fuel fixes it, I would check the point setting, and condition of the shaft bearing in the distributor shaft, can be the next check. The shaft must not move up down, or toward away from engine at all. If it does it will affect timing radically. Jim
 

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