720 carb

[dan762 1]

I just got an allis 720 and I just started it. Seems to run ok when I have the choke pulled out a little. There is a little backfiring also every now and them. I just wanted to ask you all before I start adjusting things, I dont have any manuals yet for it, so I am kinda working in the blind. any help would be great. Thanks Danny

[D-17_Dave 12]

Obviously a fuel starvation issue if some sort. I would start by doing a good cleaning and servicing of the engine since you just got it. Next be sure the fuel filters if used are replaced then check the fuel flow to the carb. from the fuel pump. Next you should try to adjust the main jet on the bottom of the carb. It's tough to get to. If you see no apparent change then remove the carb. and check for a blockage inside the fuel entry needle area. It's a simple trace through the system and find the problem(s). If this fails then contact me back so I can remove the problem tractor from your shop so your no longer spending so much energy on such a mechanical device.wah;):D

[Guest]

Call Mike at Bailey Motor Equipment and order a service kit, K2165, for your carburetor. About $29 plus shipping. Bailey Motor Equipment 10501 South Orange Ave, Unit126 Orlando, FL 32824 (800) 394-8134 You can purchase one gallon on carburetor cleaner from Advance Auto Parts for about $12. Preliminary adjustment: back out the idle jet screw about 1 1/2 turns and the main jet about 1 1/2 turns. See this thread for more info. http://www.simpletractors.com/club2/topic.asp?TOPIC_ID=76532

[JP 0]

Hi Dan, You can look up all the manuals by using your member status. Kent's done a GREAT JOB of having these available! Not sure if you'll find a 720 manual. If you can't, a 9020 will work as well. You might follow Dave's suggestions & give it a good 'look see'. Going through ALL the fluid/filter changes helps taking alot of the guess work out of the solution to what's going on. (Drop downs too!) One of the weakness's of the Onan is the timing. It's got to be 'right on' or it doesn't run well AT ALL. I recommend using a timing light. If these remedies don't offer any refief, I also suggest to follow Dave's suggestion of donating the unit to a fellow club member. Although, I disagree with his selection of who to contact. I would offer my acreage as a suitable retirement location for a unit that's obviously in need of rest & daily activities of shuffleboard & Domino's. :D JP

[D-17_Dave 12]

quote:

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Originally posted by JP
Hi Dan, You can look up all the manuals by using your member status. Kent's done a GREAT JOB of having these available! Not sure if you'll find a 720 manual. If you can't, a 9020 will work as well. You might follow Dave's suggestions & give it a good 'look see'. Going through ALL the fluid/filter changes helps taking alot of the guess work out of the solution to what's going on. (Drop downs too!) One of the weakness's of the Onan is the timing. It's got to be 'right on' or it doesn't run well AT ALL. I recommend using a timing light. If these remedies don't offer any refief, I also suggest to follow Dave's suggestion of donating the unit to a fellow club member. Although, I disagree with his selection of who to contact. I would offer my acreage as a suitable retirement location for a unit that's obviously in need of rest & daily activities of shuffleboard & Domino's. :D JP

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:O:OB);)

[dan762 1]

Thanks for all the help everyone. I did give it a good cleaning and replaced all the fuel line and filter. Cleaned the carb and drained all the old fuel out of the tank, The tank was very dirty and there was a litte water in there. I started it and it ran perfect for about 30 minutes, then it started running bad again and backfireing. I think the tank still has junk in it. (water) I guess I will try to clean it again and dry the tank out this time.

[JimH 1]

Dan, have you checked the points? And what about the plugs, these tractors can eat up plugs. Good luck with your new toy...........

[dan762 1]

No, I have not checked the points, Are they a hassle to set? I have worked on small engines all my life, (only 27 years old). But I have never messed with ONAN before. is it much different. What is the best (right) plug for them. I will put the right one in there as soon as I find out. Thanks for all your help guys. Danny

[JP 0]

Hi Danny, Well, You'll find 'Hassle' is a relative term... LOL You'll need to remove the front heat shield to 'see' the points. Then use a timing light (watch out for HOT parts.... Muffler). Look for any signs of excess oil in the points box. If there is, you may need to put in a new plunger, plunger bushing or both. There's also a plunger seal that's available. Let us know how it goes! JP

[Guest]

If you replace the points, take a piece of heat shrinkable tubing and install on the copper conductor inside the point box. You can use a Brigg's, 68768, part, for the plunger seal that's half the price of an Onan part. NAPA, Pts 7-01035 NAPA, Cond. 7-01312

[UCD 14]

   

[dan762 1]

Well.... I took the tank off and flushed it out, and took the carb apart and cleaned it. After I put it back together, It started right up. I don't have to choke it anymore to keep it running, but it seems like when I idle way down it backfires, but when I have it about 1/4 speed doesn't backfire as much. I will look at the points, I think I need to get the right plugs in it. Does anyone know what they are, right now it has some autolite ones Thanks V/R Danny

[Guest]

Champion: H-8 NAPA, Points: 7-01035 NAPA, Condenser: 7-01312

[dan762 1]

Thanks for all the help. I took the points cover off, and the points were even moving, the scews had come loose (must of been the trip from Flordia to Indiana on a trailer). Anways I messed with them until the would open and adjusted them to .20k. Started right up and i drove it for a bit never once popped or backfired. So hopefully it is good for now. Just in case I have to get points and condesor for it, does anyone know who carries them? I check my local small engine shops and no luck. I would like to get some just in case. My next questions is. I think it would be a good idea to change fluids. What all should I drain and replace. I believe the loader is self contained with a pump??? Any help would be great. Just want to make sure I dont mess anything up, I really like these 2 tractor. Does anyone that knows these tractors live close to Mitchell In. 47446. I would consider paying someone to come out and give me a little training class on them. Thanks Danny

[UCD 14]

quote:

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Originally posted by Mikefox
Champion H-8 NAPA, Pts 7-01035 NAPA, Cond. 7-01312

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NAPA AUTO PARTS STORES Points, NAPA PART# 7-01035 Condensor, NAPA PART# 7-01312

[dan762 1]

Thanks Mike and UCD for "spelling" it out for me. I guess I over looked that. You all have been a great help. I feel better now that I know someone in this club will probably have the answer. I usually learn the hard way, or breaking it first, then ask someone for help. Now I will try a different approach. Thanks V/R Danny

[Guest]

Received an email from dan762 and the carburetor service kit fixed it...

[dan762 1]

Thanks Gary, I have been on travel and just got back to Indiana. Put the kit in there and now the 720 and the 9020 both run really good. The 9020 is unbelieveable, mows, tills,grades, with so much power. The 720 with loader works great to, very handy, just need to get some tractor tires for the 720 so I can get a grip. Thanks you all for the help, triple thanks to you Gary. Danny

[Guest]

Put the tiller on the 720 front end loader for ballast.