Posted by paulinkansas on May 15, 2012 at 08:54:54 from (108.220.171.60):
This is an Onan NHC 23 horse, 2 cylinder engine. A while back I posted my problem with the loss of power on here. One symptom was that blue flames come out from one of the mufflers.
I removed the exhaust valve from that problem cylinder, and the valve seat fell out. There was a gap about the size of a toothpick between the outside of the valve seat and the hole where it"s supposed to sit.
Before taking the engine apart, I ordered a new seat, valve, springs, and head gasket. The new seat is smaller in diameter than the old seat that was in the engine.
I"ve found an aftermarket supplier of valve seats. You can choose the seat you need by o.d. i.d. height and seat angle.
For simplicity sake, let"s say the diameter of the hole in the block where the seat goes in is 2.000" The supplier I found doesn"t have 2.000" seats, but they have 1.996" and 2.004".
Which one should I buy? They are only 6 bucks each, but they have a minimum purchase amount of $25. I haven"t taken the other cylinder head off, but I"ll do that next and see what the other exhaust valve seat is like.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
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.
