Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Kountry Life
  
Garden Tractors Discussion Forum

Re: 1990 316 garden tractor Onan, loping

[Show Entire Topic]  

Welcome Guest, Log in or Register
Author  [Modern View]
Bob

11-20-2018 20:51:44




Report to Moderator

A COMMON problem with those Onans.

Carb has some clogged passages and/or Welch plug (Key #26) has fallen partially out, or not sealing.

Also, the intake manifold is made in two pieces, and sealed together with silicone rubber. Sometimes, the silicon rubber deteriorates and allows air to leak in an lean out the mixture.

[Log in to Reply]   [No Email]
PMorr

11-20-2018 22:45:56




Report to Moderator
 Re: 1990 316 garden tractor Onan, loping in reply to Bob, 11-20-2018 20:51:44  
Thank you Bob, I'll dig into it. Oh boy, Here we Go! ! Paul



[Log in to Reply]  [No Email]
PMorr

12-12-2018 13:52:25




Report to Moderator
 Re: 1990 316 garden tractor Onan, loping in reply to PMorr, 11-20-2018 22:45:56  
Well, about a month later, all that you gents have mentioned has been cleaned, repaired, adjusted and put back together. All is fine
now. You were all spot on with your comments. Here is what I found: The Carb was working OK but needed a good cleaning. This was done and reassembled with a new gasket kit. The the source of the air leaking, as you said, was the silicone seal of the aluminum manifold halves. I found that the little cast aluminum studs of the lower half (4 of 6) had sheared and not gripping the halves together. The tops of these went through proper sized holes in little flanges on the upper half casting and were peened (sp) over like a tubular rivet. I cleaned up all the stud locations on the flanges, drilled and tapped the 6 spots for 6/32 X 3/8" S.S. panhead machine screws; Reassembled all with Hi-temp Locktite at the screws and Hi-temp silicone along the manifold seams. I let it sit for a day or so waiting for the intake and exhaust tube gaskets to arrive and bolted the carb onto the manifold. It was interesting seeing how much additional "stuff" had to come off to get at the intake manifold itself. The intake Manifold is overlaid with the exhaust system. To get at the bolts for the intake manifold, the exaust piping AND muffler HAS to be removed. to remove the muffler, two bolts behind the front PTO clutch need to be removed. So, the PTO has to be removed. WOW!!!!
Once these are clear, all is wide open to do the repair. Typical destroyed items that were replaced on reassembly were 2 intake manifold gaskets; 2 exh. tube gaskets; and two smallish (1-1/2") U-bolts for the 2 muffler clamps.
She runs like a charm now. Thanks all for your help ! !
Paul

[Log in to Reply]  [No Email]
[Show Entire Topic]     [Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2019 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy