07-11-2007, 06:59 AM
[size 1]1. When I run the motor with a leaner oil mixture, does it reduce the lubrication that the mixed fuel provides and that the motor needs? In other words, am I running any risk of damaging my motor? [#bf0000]In short, yes, your motor is made to run with the mix laid out in the book. The altitude difference doesn't make the friction in the motor less, does it? The only difference elevation makes is you get slightly less O2 into your carb. You can use the air/fuel mix screw on your carb to get more air and less fuel, but unless you have a really old motor, it should not make a difference what altitude you're at.[/#bf0000]
2. When I return from Fish Lake (elevation 9000 feet) and go out on Utah Lake (elevation 4500 feet), should I put more oil back in the mixed gas? Then when I go back to Fish Lake should I add more gas to the mixture? This could get confusing! [#bf0000]If you decide to run a 100/1 ratio at altitude then by all means add more oil when you get lower. My sleds are oil injected and they have no altitude senor, why do they run just fine as high as 12,000 feet? Without getting into the theory of partial pressures of O2 (since Gshorthair will correct me if I'm wrong), the matter of a few thousand feet means nothing as far as engines go.[/#bf0000][/size]
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[#bf0000][size 1]Call Lee at Lee's Marine, he a pro mechanic and knows way more then me. [/size][/#bf0000]
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[#bf0000][size 1]I just fix the stuff (airplanes not boats), that don't mean I can spell.[/size][/#bf0000]
[size 1]I would appreciate hearing from anybody who knows about such things--either through physics and chemistry classes or mechanical experience. [/size]
2. When I return from Fish Lake (elevation 9000 feet) and go out on Utah Lake (elevation 4500 feet), should I put more oil back in the mixed gas? Then when I go back to Fish Lake should I add more gas to the mixture? This could get confusing! [#bf0000]If you decide to run a 100/1 ratio at altitude then by all means add more oil when you get lower. My sleds are oil injected and they have no altitude senor, why do they run just fine as high as 12,000 feet? Without getting into the theory of partial pressures of O2 (since Gshorthair will correct me if I'm wrong), the matter of a few thousand feet means nothing as far as engines go.[/#bf0000][/size]
[#bf0000][size 1][/size][/#bf0000]
[#bf0000][size 1]Call Lee at Lee's Marine, he a pro mechanic and knows way more then me. [/size][/#bf0000]
[#bf0000][size 1][/size][/#bf0000]
[#bf0000][size 1][/size][/#bf0000]
[#bf0000][size 1]I just fix the stuff (airplanes not boats), that don't mean I can spell.[/size][/#bf0000]
[size 1]I would appreciate hearing from anybody who knows about such things--either through physics and chemistry classes or mechanical experience. [/size]