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720 choke

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BrianC View Drop Down
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Joined: 16 Jun 2011
Location: New York
Points: 1619
Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianC Quote  Post ReplyReply Direct Link To This Post Topic: 720 choke
    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?
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DSeries4 View Drop Down
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Joined: 12 Sep 2009
Location: Ontario, Canada
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post 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.
'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
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BrianC View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianC Quote  Post ReplyReply Direct Link To This Post 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.
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