616-620 Onan troubles?Need help!
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=111518
Printed Date: 26 Nov 2024 at 4:31pm
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Topic: 616-620 Onan troubles?Need help!
Posted By: Tracy Martin TN
Subject: 616-620 Onan troubles?Need help!
Date Posted: 05 Sep 2015 at 4:56pm
Today while mowing my mower wanted to lug down at times. Not sure if it is spark or fuel problems.Started after it was pretty well warmed up. Doesn't always have this problem. Engine is tired , electric fuel pump, in line filter. Sometimes if I clutched it and turned off deck it would pickup rpms.
I really love the placement of fuel mixture needle and points. Nothing like burning your hand while trying to adjust them.Any thoughts? Thanks Tracy
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No greater gift than healthy grandkids!
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Replies:
Posted By: DSeries4
Date Posted: 05 Sep 2015 at 10:36pm
Make sure both spark plugs are good. Replaced mine a few years back and the engine ran worse. 1 Plug was bad from the start - slipped passed quality control.
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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
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Posted By: Tracy Martin TN
Date Posted: 05 Sep 2015 at 10:45pm
Plugs looked OK.
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No greater gift than healthy grandkids!
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Posted By: sparky
Date Posted: 06 Sep 2015 at 1:57pm
Tracy,I had 2 plugs that looked practically new in my 616 but after a couple of hair pulling days I replaced them and problem solved. (P.S. They sparked great through my plug tester) Good Luck.
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It's the color tractor my grandpa had!
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Posted By: Tracy Martin TN
Date Posted: 06 Sep 2015 at 6:51pm
Re-set the points and it is much better. Not perfect but she is tired. At least a 1/2 quart of oil per mowing, about 3 to 4 hours. Tracy
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No greater gift than healthy grandkids!
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