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914 hot starts

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pbuttles(at)charter.net
Guest

Posted: Wed Jul 22, 2009 8:14 am Post subject: 914 hot starts

I have been having a problem with hot starts in a 914 in a 701

will start fine cold  run it for a while and and shut down ,fuel up or eat ,whatever and go to start it it will just not catch

tried different throttle positions and seem to get better results with more throttle 

have tried not using fuel pump to start and seems better 

anyone else had that problem with 914 or 912

im at denver and wondering if alltitude  contributes?



Tracy

peter.rees01(at)tiscali.c
Guest

Posted: Wed Jul 22, 2009 9:08 am Post subject: 914 hot starts

Do you have the water based carb heat fitted? If so, this can cause hot 

start problems in some circumstances. Some guys have found it necessary to 

fit a shut-off tap to stop in the carb heat water circuit to ensure that the 

carbs are cool enough when you want to start again.



Peter



---

rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed Jul 22, 2009 11:34 am Post subject: Re: 914 hot starts

Tracey,



Start thinking about vapor lock as it would apply to your

particular installation in a 701. Move bubbling fuel out of your

engine compartment. What does your POH or Zenith say about

warm starts?

_________________
Ira N224XS

l_luv2_fly(at)yahoo.com
Guest

Posted: Wed Jul 22, 2009 3:46 pm Post subject: 914 hot starts

Hi Tracey,



I have a 914 in my Europa and it can be tough to start when its hot.  I find it starts just fine if I turn the fuel pumps off, start it and then turn the pumps back on.



Hope this helps,



Paul



         [quote][b]

Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Wed Jul 22, 2009 11:34 pm Post subject: 914 hot starts

Hi Tracy

On my 914 i dont use the fuel pumps when hot, about 1/4 throttle and she picks up easily,I then wait until she falters through lack of fuel before hitting the pump switch, leaving the oil/water filler doors open for a short while on the ground improves the starting also,

regards

Ivor



 I have been having a problem with hot starts in a 914 in a 701

 	  Quote: 	
		   will start fine cold  run it for a while and and shut down ,fuel up or eat ,whatever and go to start it it will just not catch

 tried different throttle positions and seem to get better results with more throttle 

 have tried not using fuel pump to start and seems better 

 anyone else had that problem with 914 or 912

 im at denver and wondering if alltitude  contributes?

 

 Tracy

icrashrc

Joined: 16 Mar 2006
Posts: 247
Location: Mishawaka, In

Posted: Thu Jul 23, 2009 12:00 am Post subject: Re: 914 hot starts

The fact that you get better results with the fuel pump off coupled with opening the throttle implies that the engine is slightly flooded on a hot start. My guess would be that the carbs are getting hot enough to push the fuel from the floatbowls into the intake manifold after shutdown. Do you have the Rotax carb driptrays installed? These help block the heat from the exhaust on the 912 series and I assume [there's THAT word'] that the 914 is a similar layout concerning the exhaust/floatbowl layout.



Have you tried turning the fuel valve to OFF a minute or so before shutdown?

 	  pbuttles(at)charter.net wrote: 	
		  I have been having a problem with hot starts in a 914 in a 701

will start fine cold  run it for a while and and shut down ,fuel up or eat ,whatever and go to start it it will just not catch

tried different throttle positions and seem to get better results with more throttle 

have tried not using fuel pump to start and seems better 

anyone else had that problem with 914 or 912

im at denver and wondering if alltitude  contributes?



Tracy

_________________
Scott

www.ill-EagleAviation.com

do not archive

pbuttles(at)charter.net
Guest

Posted: Thu Jul 23, 2009 4:28 am Post subject: 914 hot starts

thanks for the info guys

pertty much what I have been thinking  and doing to start it



Tracy

dashwood

Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada

Posted: Thu Aug 06, 2009 4:16 am Post subject: Re: 914 hot starts

i can never start hot if i pulse or run the electric fuel pump before i try a turnover. the engine will flood and not start. cold starts i check run the pump first.  turn off and start engine. i only run electric pump for low level and take off and approaches , in flight am only running on engine fuel  pump .

mikenjulie.parkin(at)btin
Guest

Posted: Thu Aug 06, 2009 11:14 am Post subject: 914 hot starts

Despite the subject, I take it you are not using a 914 - last time I looked

my 914 didn't have a mechanical pump.



Regards,



Mike

Do not archive

--

dashwood

Joined: 24 Jan 2009
Posts: 73
Location: sw ontario canada

Posted: Fri Aug 07, 2009 3:45 am Post subject: Re: 914 hot starts

just trying to help. the first message asked for  914 and 912  ssoooo yes i was talking of my own experience with my 912.

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