Running your carb dry?gas engine
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Running your carb dry?gas engine
Out of habit, I've always emptied the tank and ran the engine dry on my glow engines then squirting a little after run oil in the crankcase vent tube. Now that I've got 2 gas engines, I've also read that the methanol in today's gas deteriorates the carb rubber parts in the Walbros. Members of my club that have run gas engines for 10 years never empty their tanks or run the gas out of them unless it's the last run before storing them for the winter. I noticed they do have to rebuild the carbs every onece in a while.
Is it advisable to dry run the engines and add after run oil in gas engines after each flying session or is this a waste of time?
Is it advisable to dry run the engines and add after run oil in gas engines after each flying session or is this a waste of time?
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RE: Running your carb dry?gas engine
Hummmmmm my weed wacker is 9 years old and I have never run it dry before winter storage, our winters are short hear in the south though.
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RE: Running your carb dry?gas engine
ORIGINAL: Tired Old Man
I think the frequency that people are advised to get the diaphragpms wet in their carbs in order for them to run or draw fuel should effectively answer the wet or dry carb question.
I think the frequency that people are advised to get the diaphragpms wet in their carbs in order for them to run or draw fuel should effectively answer the wet or dry carb question.
#7
RE: Running your carb dry?gas engine
I would run the engine dry of the flight fuel and then fill it with Coleman fuel at the desired oil mix and run it untill all elements are saturated with the Coleman fuel mix. This eliminates the alcohol problem and keeps the carb wet with friendly fuel. Also Coleman does not go stale, it stores indefinitely with no degradation. Just do what you think best, though, my Zenoah G23 with EI runs great on the Coleman and Pennzoil at 32:1, so I don't need to switch over to this mix at day/season end.
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RE: Running your carb dry?gas engine
[font="Verdana"]I always run my engines dry – mostly because the planes are stored in our family living room and nobody (except perhaps me) likes to have the ambiance enhanced by the smell of 91 octane auto gas or 100LL avgas!
In my 20 years experience running Quadra 45s, Zenoah G-62s and, more recently (past 3 years) running 3W-75s, I’ve never had fuel/carb issues as a result of this 'run-dry' approach. I do; however, open the carb occasionally to clean out the crap trap (screen) – perhaps once and sometimes twice a year. Several of my engines have currently consumed well over 150 gallons of fuel and, in addition to still going strong, have never seen a rebuild on the carb!
My guess is: Either approach works – just as long as you don’t store the fuel beyond its normal lifespan (say 3-6 months without stabilizer)! Good luck.
In my 20 years experience running Quadra 45s, Zenoah G-62s and, more recently (past 3 years) running 3W-75s, I’ve never had fuel/carb issues as a result of this 'run-dry' approach. I do; however, open the carb occasionally to clean out the crap trap (screen) – perhaps once and sometimes twice a year. Several of my engines have currently consumed well over 150 gallons of fuel and, in addition to still going strong, have never seen a rebuild on the carb!
My guess is: Either approach works – just as long as you don’t store the fuel beyond its normal lifespan (say 3-6 months without stabilizer)! Good luck.
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RE: Running your carb dry?gas engine
After my last flight I pulled the fuel line and ran my 26cc engine til it quit. Today I took the carb apart to check the filter screen for debris. The filter screen and the fuel pump diaphragm were both wet with fuel. Twas not enough to drip out but the fuel that was in there would not have evaporated by spring.
So dry is still damp!!
So dry is still damp!!
#14
RE: Running your carb dry?gas engine
After use I flood out my leaf blowers =2, string trimmer, chainsaws (all3) I have done this for years and not had to replace any carb part. I use some fuel stabilizer if not run within 2 months. If when I start them and if they do not start right away...I dump gas out of tank and refill with fresh. Yup flood them out at end of use that day. Done it for years. My friends that listen to me all say there power products start a lot better. Capt,n
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RE: Running your carb dry?gas engine
I too use the choke to kill my 2 cycle lawn equipment, and also with a couple of my reed valve engines because I have no kill switch but a servo on the choke. I know some think this is bad, but I have done it for four years without hurting the reeds.
#16
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RE: Running your carb dry?gas engine
Sounds to me that wet is good - at least not bad. I feel for the people that must store their plane in the house. My wife can smell gas on me after a day of flying and the plane is still in the truck. If I had to store inside I guess I would still be using glow fuel.
#17
RE: Running your carb dry?gas engine
Previously posted, but would also eliminate the smell on you if you ran Coleman all the time instead of gasoline. I do it because I don't like the gasoline smell.
"I would run the engine dry of the flight fuel and then fill it with Coleman fuel at the desired oil mix and run it untill all elements are saturated with the Coleman fuel mix. This eliminates the alcohol problem and keeps the carb wet with friendly fuel. Also Coleman does not go stale, it stores indefinitely with no degradation. Just do what you think best, though, my Zenoah G23 with EI runs great on the Coleman and Pennzoil at 32:1, so I don't need to switch over to this mix at day/season end."
Regards,
Richard
"I would run the engine dry of the flight fuel and then fill it with Coleman fuel at the desired oil mix and run it untill all elements are saturated with the Coleman fuel mix. This eliminates the alcohol problem and keeps the carb wet with friendly fuel. Also Coleman does not go stale, it stores indefinitely with no degradation. Just do what you think best, though, my Zenoah G23 with EI runs great on the Coleman and Pennzoil at 32:1, so I don't need to switch over to this mix at day/season end."
Regards,
Richard
#18
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RE: Running your carb dry?gas engine
Coleman fuel has an octane variously stated between 40 and 60, but very low none-the-less.... I would NOT run it as my flying fuel, though I do use it as a storage fuel. When running my engines on Coleman fuel to purge the carb/engine of the flying gasoline mix, they run very noticeably hotter, even just on a quick ground run. I know, lots of people say they fly with Coleman fuel with no problems, but do you want to risk your high dollar engine AND plane on it??
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RE: Running your carb dry?gas engine
keep the carby internals Wet , if you run the carby / engine dry there is no oil in the fuel to keep the carby diaphram soft. also forget the magic fuels just use the good old car petrol / gas with good 2 stroke oil at the correct mix.