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JD 301AG tune-up specs?

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Tejas

09-07-2002 10:05:55




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Does any one have the tune specs for a '74 model 301AG? Has anyone heard of this model? apparently it's an industrial variant.




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Dave

09-15-2002 19:16:09




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 Re: JD 301AG tune-up specs? in reply to Tejas, 09-07-2002 10:05:55  
From the JD301-A owner's manual:

Valves � per 1000 hrs. Engine can be hot or cold. Intake 0.014 in (0.36 mm), Exhaust 0.022 in (0.56 mm)

(if you have a diesel, intake same, exhaust 0.018 in (0.46 mm))

Spark plug gap: 0.025 in (0.6 mm)

Point gap: 0.020 in (0.5 mm)

Timing (w/timing light): connect to #1 (front) plug, at 2500 rpm the S mark on the crank pulley should line up with mark on engine casting

Idle speed: 600 rpm

Idle mixture: screw at top rear of carb, adjust so that will idle smoothly at 600 rpm

High speed adjustment: needle is at bottom rear sticking out of the solenoid housing. At full throttle, turn screw in until engine starts to falter. Then turn out until engine begins to run smoothly. Screw out one more turn. Check under load and adjust if necessary. In very cold weather, it is advised to open screw an additional � - � turn.

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Preston

09-09-2002 11:00:07




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 Re: JD 301AG tune-up specs? in reply to Tejas, 09-07-2002 10:05:55  
I have a 301A '74, mine is a 3 cyl. diesel, but I have all the manuals. what info are you looking for?



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tejas

09-09-2002 18:16:02




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 Re: Re: JD 301AG tune-up specs? in reply to Preston, 09-09-2002 11:00:07  
I was looking for points gap/dwell, timming and valve lash. I would appreciate any info you could provide.



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Preston

09-11-2002 08:23:54




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 Re: Re: Re: JD 301AG tune-up specs? in reply to tejas, 09-09-2002 18:16:02  
Point Gap 0.020
Timing is to align "S" on crank pulley with mark on engine casting. front cyl plug wire engine at 2500 rpm
Valve process is abit more complex. Rotate no. 1 cyl (front)to TDC in compression stroke. (use timing screw provided on tractor)set cyl 1 & 2 exhaust and 1 & 3 intake, rotate engine 360 degrees and set cyl 2 intake & 3 exhaust.
Intake 0.014
exhaust 0.022



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