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  #1  
Old 07-31-2019, 10:12 AM
Kupde Kupde is offline
 
Join Date: May 2016
Location: Tampa,Fl
Posts: 27
Default Hard starting RV-10

I have about 100 hours on my RV-10 and almost all starts are immediate with the exception of the expected hot starts. Only twice on cold starts did I have a problem with the starts. Both times itís been overnight outside in Pensacola in the summertime. Normally my plane is hangered in Tampa. The question is does anyone know why this would occur?

Thanks

Kevin
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  #2  
Old 07-31-2019, 11:53 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 4,141
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Quote:
Originally Posted by Kupde View Post
I have about 100 hours on my RV-10 and almost all starts are immediate with the exception of the expected hot starts. Only twice on cold starts did I have a problem with the starts. Both times it’s been overnight outside in Pensacola in the summertime. Normally my plane is hangered in Tampa. The question is does anyone know why this would occur?

Thanks

Kevin
I would guess, assuming you use the same priming technique for each cold start, that the plane baking in the sun all afternoon evaporated more fuel out of the post servo, fuel lines than normal, requiring a bit longer priming time to fill them back up the next day.

Larry
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Last edited by lr172 : 07-31-2019 at 02:51 PM.
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  #3  
Old 07-31-2019, 02:10 PM
bob888 bob888 is offline
 
Join Date: Jul 2012
Location: Fresno, CA
Posts: 242
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I assume you have the Lycoming IO540...I also had a hot start problem initially. I finally realized that the normal procedure for cold engine caused flooding with raw fuel running down into the filter box when the engine is hot. I now start hot with NO prime or boost EVER and start with mixture full lean, gradually advancing as I crank. It will virtually always start but sometimes needs a short shot of boost pump once it is firing.
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  #4  
Old 08-01-2019, 08:57 AM
Kupde Kupde is offline
 
Join Date: May 2016
Location: Tampa,Fl
Posts: 27
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Thanks for the help. Just to be clear itís a cold start issue only on 2 occasions after sitting out for the night in Pensacola

No issues with hot starts

Thanks Kevin
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  #5  
Old 08-03-2019, 08:58 AM
MauleDriver's Avatar
MauleDriver MauleDriver is offline
 
Join Date: Aug 2006
Location: Lake Ridge Aero Park - Durham NC
Posts: 186
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What is your normal procedure for cold starts?

The procedure I use for cold and hot weather, hangared or tied out, tropics or temperate climes, is:
Throttle and mixture closed
Boost pump on
mixture and throttle full forward until my fuel flow meter shows 5gph (?)
Throttle and mixture closed, then throttle forward 1/4Ē
Engage starter and move mixture forward to lean idle position after first cylinder fires.
Boost Pump Off
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  #6  
Old 08-04-2019, 11:05 AM
flysrv10 flysrv10 is offline
 
Join Date: Jan 2010
Location: Florida
Posts: 103
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Quote:
Originally Posted by Kupde View Post
I have about 100 hours on my RV-10 and almost all starts are immediate with the exception of the expected hot starts. Only twice on cold starts did I have a problem with the starts. Both times itís been overnight outside in Pensacola in the summertime. Normally my plane is hangered in Tampa. The question is does anyone know why this would occur?

Thanks

Kevin
Be sure you either have an impulse coupler of Shower of Sparks. When new, the engine starts without them, as the mag ages, it gets harder to start and finally, no hot starts!
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  #7  
Old 08-04-2019, 04:34 PM
ReidVaitor ReidVaitor is offline
 
Join Date: Jun 2006
Location: SoCal
Posts: 146
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Quote:
Originally Posted by Kupde View Post
I have about 100 hours on my RV-10 and almost all starts are immediate with the exception of the expected hot starts. Only twice on cold starts did I have a problem with the starts. Both times itís been overnight outside in Pensacola in the summertime. Normally my plane is hangered in Tampa. The question is does anyone know why this would occur?

Thanks

Kevin
What is the problem exactly? it takes longer to start? it doesnt start? it starts than dies?
Your in a humid area, did you check for water in the fuel?
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