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720 fuel pump

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=184032
Printed Date: 20 Apr 2024 at 4:38am
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Topic: 720 fuel pump
Posted By: AC720Man
Subject: 720 fuel pump
Date Posted: 19 Oct 2021 at 10:31pm
Steve, looks like I will be ordering that electric fuel pump from you. Called today to get a fuel pump rebuild kit for a Onan cckb. Was flabbergasted at the price of a rebuild kit that I paid $47 for 8 years ago. So,not staying factory correct, I will be trying your kit. I am a factory stock guy, but this doesn’t make economic sense to me. Trying to support your retirement my friend lol. I’m sure it will perform well.

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD



Replies:
Posted By: Steve in NJ
Date Posted: 20 Oct 2021 at 8:37am
Hi Rob!
Thank you for keeping us in mind! I havta' put a kit together for ya if you want one. Sheesh, seems like a hot commodity lately.  I sold two of those kits this month so far and two last month. I don't know, maybe everybody is tired of paying a lot of dough for a little rebuild gasket kit. Everything is starting to go up. I just got another wire increase because of Copper going up, so here we go again adjusting prices on the website for the wiring systems.  This is gettin' old, and so am I........   Wacko
Steve@B&B


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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife


Posted By: BrianC
Date Posted: 20 Oct 2021 at 11:53am
I have an electric pump on mine. One thing I like is when you run out of gas,
the pump fills the carburetor quickly, much less cranking to start.
At least that is my observation, I have 2 other Onans, with the original system, and they
need a lot of cranking or ether. I didn't look, is there a primer lever or bulb that I overlooked?


Posted By: orangeman
Date Posted: 20 Oct 2021 at 3:36pm
BrianC:  Regarding the primer, the OEM system did not have a primer.   Some install a boat primer bulb to assist with fuel to carb bowl.  Have seen this type of retrofit, boat fuel line primer in an Allis Diesel as well. 

Orangeman


Posted By: AcFordHawk
Date Posted: 20 Oct 2021 at 3:49pm
On the 620 and 9020 tractors I once owned both Onan mechanical fuel pumps had a priming lever from the factory.  Silver lever with return spring.  It can be a pain to get to being under the carb and the  throw is short so takes a few pumps.   




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IB (restoring), MF GC1705, MF 2705E


Posted By: orangeman
Date Posted: 21 Oct 2021 at 12:19pm
ACFordHawk has it right. I stand corrected!  My 620 has a Mr. Gasket #42S HTH's.  

Orangeman



Posted By: AC720Man
Date Posted: 04 Nov 2021 at 9:09pm
Steve, received the new fuel pump kit. Very nice kit, looking forward to install it this weekend and get my 720 mowing the yard again.

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD


Posted By: HudCo
Date Posted: 04 Nov 2021 at 10:16pm
i bought that same 42s low preasure pump about six mounts ago for my 616 and not got it on yet but will soon  should help it seems like the carb is allways out of fuel  i will get mine done when i switch over to the cckb manifold and carb


Posted By: Steve in NJ
Date Posted: 06 Nov 2021 at 5:58pm
10-4 Rob!  That got there quick!
Steve@B&B


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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife



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