Posted by Glen D Anderson on January 18, 2009 at 18:54:46 from (75.158.71.82):
In Reply to: 440 snowmobile posted by jim malla on January 18, 2009 at 14:28:49:
Detonation, but why?
Where are the holes located?
If they are close to or right on the edge of the exhaust port side of the piston, a lean condition stemming from improper carburetor operation or vacumm leakage likely caused the problem.........
If the holes are closer to center of the piston, causes may lean towards too low of octane fuel, overheating(inadequate coolant circulation or air flow if engine is fan cooled), incorrect timing, etc............
Before the engine is operated again after the pistons are replaced the carburetor/s should be completely disassembled and properly cleaned. Proper jetting(or high speed adjustment) for your altitude should be confirmed at that time.
Proper cooling system operation should be confirmed. Proper heat range of spark plugs used. Confirm there is no leakage from engine crank seals, base gaskets, carburetor boots etc., that could causing a lean mixture...........
Lastly, use quality fuel. Premium at least............
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 - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
