What causes a snowmobile to run lean?
Lean burndowns are a result of too much air in the air/fuel mixture that feeds an engine. Too much air in the mixture can come from several other sources including leaking engine seals or airbox leaks caused by modifications, mis-aligned parts, cracks or unseated carb boots.
What does ext mean Arctic Cat?
This was a continuation of the work being carried out by Shorty Long and company for most of the Arctic racers from the beginning. An EXT designation means the engine mods were done by the engine manufacturer to Arctic Cat specifications.
Does Yamaha own Arctic Cat?
There are some facts Yamaha riders need to understand about this melding of the two companies. First, Yamaha hasn’t been involved with Arctic Cat in a vacuum. Yamaha’s engineering team has been working and walking in lock-step with Cat since the beginning on pretty much every sled with a “Y” on the hood.
When did the Arctic Cat ext special come out?
And it launched the success (and fortune) of FOX Shox in the snowmobile arena. Sadly, the original AFS-version of the EXT Special was a one-year wonder. Looking to promote its all-new Prowler (which also debuted in 1990) chassis, Arctic Cat returned in 1991 with Special versions in this new chassis.
What kind of fuel does Arctic Cat 800 use?
If you were one of the owners of a 2011 Arctic Cat sled equipped with the 800 H.O. engine and burned 91 octane fuel, you might have been surprised to occasionally experience “Limp Mode” (indicated with the “OCTN” code on the speedo, a 7700-rpm ceiling and extra-rich fuel/air mixture).
What was the problem with Arctic Cat in 2011?
The problem wasn’t octane. It was ethanol. When Arctic Cat calibrated the EFI system for 2011, engineers couldn’t factor some of the high concentrations of ethanol that exist in certain regions of the country.
How to fix the Arctic Cat 800 reflash?
1. Change the fuel injection timing strategy: Not the amount of fuel, but when the injector is fired based on crank angle. 2. Recalibration (the amount of fuel and ignition timing) in partial throttle areas when the APV exhaust valve is in the down or middle-position.
What is the repair manual for an Arctic Cat snowmobile?
Arctic Cat repair manuals cover every aspect of maintenance and repair. Here’s a small sample of topics often covered in an Arctic Cat snowmobile repair manual (actual topics will vary depending on year an model): MM/ln. Conversion Chart Console (Standard EFI Models).
What does ext stand for in Arctic Cat?
This was a continuation of the work being carried out by Shorty Long and company for most of the Arctic racers from the beginning. An EXT designation means the engine mods were done by the engine manufacturer to Arctic Cat specifications.
How big is an Arctic Cat snowmobile engine?
Arctic Cat is based in Thief River Falls, Minnesota. Links Arctic Cat Arctic Cat Snowmobiles 20 cc 100 – 1965, 1966, 1967 C-8 – 1968 P-8 – 1967 101 – 1965 120D – 1965 140D – 1966 141D – 1966 170D – 1965, 1966 305K-L – 1971 450D – 1965 30 cc
When did the Arctic Cat ext program end?
Over the next few months Arctic Cat’s 1970-73 EXT program will be examined and discussed at length, with an emphasis on model identification for collectors. In time, other brands of sleds will get their turn under the microscope, in this column.