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-   -   Choking before using the spring starter ? (https://www.rcuniverse.com/forum/gas-engines-142/10646531-choking-before-using-spring-starter.html)

Ed 07-30-2011 08:42 AM
Choking before using the spring starter ?
 
I've seen people choke the Carb, and rock the prop back and forth on compression a few inches, and then again, I've seen people make several full 360* revolutions of the prop while choking. Which do you think is more effective ? Wouldn't a full revolution draw fuel further into the cylinder ?

Thanks .

ed

DaddySam 07-30-2011 12:16 PM
RE: Choking before using the spring starter ?
 
I have a spring start on a G62. I choke it and use the spring start until it fires, then no choke and it starts right up.
Sam

karolh 07-30-2011 01:35 PM
RE: Choking before using the spring starter ?
 

ORIGINAL: Ed

I've seen people choke the Carb, and rock the prop back and forth on compression a few inches, and then again, I've seen people make several full 360* revolutions of the prop while choking. Which do you think is more effective ? Wouldn't a full revolution draw fuel further into the cylinder ?

Thanks .

ed
I use the choke on prop rocking motion to get fuel into the carb, and then do a couple full prop flicks to prime the cylinder. Can't say for sure which one is more effective by itself as both methods work. One thing for sure is that the prop rock method can get an engine flooded in a hurry if one is not careful.

Karol

nonstoprc 07-30-2011 02:37 PM
RE: Choking before using the spring starter ?
 
Prop rocking is easier than the full flips. It is quite effective to draw the fuel to the carb.

Make sure you count the # of rocking motions such that the fuel is at the carb. Then a couple of flips to pop the engine. Next time, it will be a habit.

w8ye 07-30-2011 05:13 PM
RE: Choking before using the spring starter ?
 
Rocking the prop just runs the fuel pump

To get fuel up into the combustion chamber, you need some full revolutions

This is described by Karolh

Engine created vacuum can suck fuel past the pump and metering valve and into the engine if the carb inlet is completely closed off while the engine is being turned over. (Not recommended)

Tired Old Man 07-30-2011 06:15 PM
RE: Choking before using the spring starter ?
 

ORIGINAL: DaddySam

I have a spring start on a G62. I choke it and use the spring start until it fires, then no choke and it starts right up.
Sam

Good call.

Ed 07-30-2011 07:07 PM
RE: Choking before using the spring starter ?
 
" Rocking the prop just runs the fuel pump

To get fuel up into the combustion chamber, you need some full revolutions " - W8YE

This is exactly the reason that I asked the question. Thank you for verifying.

Ed


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