Carb choke vs fuel primer

by Mike Kopacki in 2 Stroke Technical Questions 12 years ago

My 582 mod 99 came with a fuel primer. Does that mean that the carburetor does not have a choke valve?

Re: Carb choke vs fuel primer

by bill martin » 12 years ago

bill martin

10 757 0

Mike,

You do have a choke valve (enrichener circuit). If you look at the upper right side of the carb, you will see one of three possible configurations. A rubber boot like the one on top of the carb but with no cable in it is probably what you have. This is the most common configuration. The enrichener valve is down in there in a permanently closed position. If you have a primer, you really don't need the enrichener. The enrichener is not really a choke. It just adds extra fuel to the carb just as the primer does. The second configuration is a small lever on each carb which actuates each enrichener. It attaches to the valve to lift it up when needed. The third is a cable in each of the rubber boots which goes to a splitter, then to a single choke lever in the cockpit.

If you are doing a lot of flying in very cold temps, you may want to add enrichener controls to use during warmups. For most flying however, you won't need the enrichener if you have a primer.

Bill.

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Re: Carb choke vs fuel primer

by mike hallam » 12 years ago

mike hallam

3 40 0

To expand on Bill's gen.
I use the enrichener in flight too (R.447)in English winters, to control EGT, yet save fiddling arbitrarily with jet or needle configuration because when its cold the fuel doesn't atomise very efficiently.
I use just a tiny touch in flight keeping a close eye on the EGT as my guide.
On really cold day I can use it as a 'mixture control' adding a smidgeon of extra fuel so the EGT stays in scope.
Have been doing this for eight winters now.

mike hallam

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Re: Carb choke vs fuel primer

by Mike Kopacki » 12 years ago

Mike Kopacki

37 62 11

I'm not big on mechanics...yet. I was reading up on carbs yesterday and came up with that question. When I was looking for a Quicksilver with a R.582, I read nothing about fuel primers - the only references were to the choke and using a choke when the engine was cold.

So I was surprised when it had the primer. So while I was reading yesterday, I came up with that question.

I will be putting my bird up for the winter soon and will not need any mods for cold weather flying. When I remove the air filters to spray the carbs, I will take the opportunity to look at the carb and take some pictures.

But I will need good reading material on engines, 2 stroke engines, carburetors, etc for the winter!

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Re: Carb choke vs fuel primer

by bill martin » 12 years ago

bill martin

10 757 0

Mike,

You can download all the manuals for your engine from the support tab at the top of the page. Another good source of practical information can be downloaded from the California Power Systems 1-800 Airwolf website. Just click on the tech info tab on that site and go to tech articles. Lots of how-to advice.

Bill.

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Carb choke vs fuel primer

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