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primer

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Sat May 21, 2011 2:40 pm Post subject: primer

I have a boost pump installed and a electric primer solenoid,  how much throttle, and how much prime, on a first start do you guys find easiest or best for starting?  example one third throttle and five seconds of prime??

Henry

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n395v

Joined: 10 Jan 2006
Posts: 450

Posted: Sun May 22, 2011 5:19 am Post subject: Re: primer

I use 3 sec of prime and 1/2" of throttle.



If you are using this solenoid http://www.aircraftspruce.com/catalog/appages/elsolprimer.php



double check it was installed in the correct orientation. #2 orifice is in # 1 orifice is out.



If backwords the boost pump will blow the plunger open and flood the engine.



You might also consider installing a check valve between the solenoid and manifold as depending on where the solenoid is in your fuel system there is a chance it will get "sucked" open at high power/fuel flow.

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Milt

HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Mon May 23, 2011 5:18 pm Post subject: Re: primer

I will check to see if I have it hooked up correctly, last year I started it for the  first  time  and had a heck of a time getting it started,  as you can see on the video. 



Thanks Milt

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mark.bitterlich(at)navy.m
Guest

Posted: Tue May 24, 2011 1:57 pm Post subject: primer

Here's just a small suggestion.  Do you have an intake drain kit?  If

you do not, you need to install one.  They are very important.  



If you have one, you can prime the crap out of the engine (over-prime it

intentionally) and the excess fuel will just run right out of the open

intake drain kit.  Prime the living daylights out of it, go back and

pull the prop through a few blades (be real careful here because you can

start this engine in a heartbeat if the P leads are not right!) and then

watch the excess fuel run out the intake drain valve.  Doing this

accomplished a few things. 



1.  It shows that the intake drain is working and is not clogged up with

oil.  If fuel comes out, there is no more oil to DRAIN out, and that is

a good thing. 



2.  It gets fuel into the cylinders and lets it cook for a little while.

Close the intake drain valve.  Get in the airplane and crank with the

throttle just slightly off the stop.  Be ready to shoot some prime when

it starts, especially if it is cold weather.  



It will start almost instantly.  If you go more than two blades with no

firing, then repeat the process.  Don't just keep spinning the engine,

you will run out of air.  



This all adds time to the starting process, but it WORKS.  



Mark Bitterlich

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Tue May 24, 2011 2:54 pm Post subject: Re: primer

I checked the primer solenoid today and it is hooked up correctly with the # 2 port in and  # one out . yes I do have the drain kit installed on the three bottom intake manifolds and I am about two weeks for my second start up.  I'll try that, when I start it up . Last year it shot fire from the exhaust when it started, all the guys thought it was mighty robust to say the least.

Thanks for all the help guys .



Henry

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