Garden Tractors - 720 choke

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720 choke

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=82928
Printed Date: 10 May 2024 at 10:17am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 720 choke

Posted By: BrianC
Subject: 720 choke
Date Posted: 08 Jan 2014 at 6:04pm

My 720 seems to be a cold blooded machine and using the choke is a touchy proposition.

Engageing the mower while the thing is cold may stall it out.

The JD 318 with same style Onan engine is a little less sensitive.

My C tractor requires full choke only to come alive then I have to let the choke off right away. To me, that's the best. My JD x320 (Kawasaki) lawn mover is same.

But them old Onan's, I seem to have to fiddle with the choke setting.

Any comments, is the typical?

Replies:

Posted By: DSeries4
Date Posted: 09 Jan 2014 at 8:49pm

My 620 is the opposite. Just a quick shot of choke is all it needs. Anything more and it will flood out. If it is stalling out by turning on the blades, I suspect you might have some weak ignition components (could be the source of your hard starting problem too). You might want to think about some plugs, wires, dist cap, and adjusting breaker points.

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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

Posted By: BrianC
Date Posted: 10 Jan 2014 at 9:17am

Time for a tuneup. Also, it has an electric fuel pump, so the original parts have been

re-engineered. Vertical muffler also. Once warmed up it is good.