mark.bitterlich(at)navy.m
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 Posted: Sun Jan 08, 2012 3:04 pm Post subject: M14PEngines-List: Re: M14P starting issues |
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Wow.
Reposted to the Yak List for info. This is one worth remembering.
Mark Bitterlich
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From: owner-m14pengines-list-server(at)matronics.com on behalf of waterpro
Sent: Sun 1/8/2012 5:38 PM
To: m14pengines-list(at)matronics.com
Subject: M14PEngines-List: Re: M14P starting issues
WE GOT IT RUNNING!!!! Bill is ecstatic!
Here is today's progress report:
We went over the timing with a fine tooth comb. It's bang on 15 degrees on both mags.
We cleaned everything related to the points and every contact inside both mags.
Checked the gap on the points .022-.025 mm on each respectively.
Here is where it gets interesting so pay attention! 
I know this engine needs lots of prime to get going when dry, but the #7 cylinder issue got me thinking more physics than engine mechanic.
The #7 cylinder is the closest to the primer nozzle, and the first intake that is "downhill" in the intake sequence.
We knew we had good prime to the primer line, but no idea what happened after that.
We went to remove the primer nozzle (a bugger of a job) but could not get it out even after removing the entire alternator and #7 intake manifold.
Bill has moments of greatness and figured that there was no point in removing the primer nozzle because we could just see it through the #7 intake once the pipe was removed.
We hooked all of the fuel back up and gave it a shot of prime.
Blah.....3 very small disorganized streams of fuel came out of the end of the primer nozzle almost at a right angle and went towards the front of the engine.
THIS EXPLAINS IT ALL!
The end of the primer nozzle obviously had something plugging it. We took the primer line off again and cleaned everything as well as blew it out with compressed air.
Nothing noticeable came out even though we had a rag over the primer nozzle to make sure nothing got in to the impeller or the rest of the engine.
After hooking everything back up, we tried the prime again.
Beautiful! A nice wide fan like spray of fine fuel mist went everywhere.
There was about 3 times the volume of fuel in this spray than there was in the streams before the cleaning.
We re assembled the engine and checked everything.
It took us about 10 min. to roll the plane out of the shop, prep it, go through the pre-start checklist and get her running.
She fired right up with a few small sputters and a real nice orange flame from both exhausts, along with a backyard full of white smoke.
In conclusion it is quite simple. The primer was not putting fuel where it needed to be in order to have the impeller spin the fuel in to all of the intake pipes. It simply spurted out a disorganized glob of fuel of which half ran right in to intake #7 and the rest straight down and out the manifold drain hoses.
Thank you to all of those who gave their opinions and ides. You got us going and kept us motivated.
One more Russian radial will be in the air this spring.
Peter
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=362778#362778
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