[NSRCA-discussion] Mintor 1.70 Question

[Jim Woodward]

The last person I saw run a Mintor 170 in D3 eventually fixed it by removing
the pump completely and installing a Perry Pump.  

Thanks,

 

Jim W.

 

 

 

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Michael
Laggis
Sent: Thursday, August 03, 2006 10:35 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Mintor 1.70 Question

 

Tim,

My motor had odd pump problems.  I finally took the pump off and took it
apart.  What I found inside amazed me.  The outlet was packed full of metal
curly cues from machining.  Sometimes they blocked the flow of fuel
sometimes they didn't.  I was chasing needle setting all over.  I removed
the metal shavings cleaned the pump and put it back on.  The motor settled
down after that.

 

Michael

 

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org on behalf of Pascoe,Tim
[Burlington]
Sent: Thu 8/3/2006 6:01 AM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] Mintor 1.70 Question

Hey List,

        I've been setting up a Mintor 1.70 in a new plane, and am running
into some minor difficulties. I first started running the engine last fall,
and has some mechanical trouble which lead to some major needle twisting.
After getting the mechanical trouble out of the way, I've found myself
trying to get the pump/needles back to where they should be, with varying
levels of success.

        The original symptoms seemed to indicate a lean mid-range on the
engine; dying on throttle up after a down line, the odd backfire when
spooling up from idle in the flat. I've been constantly richening the pump
in an attempt to solve these issues, and it seemed to work at first. Better
mid-range, no dead sticks. However, I am still getting the odd backfire, and
I'm really afraid that I'm going to start busting stuff. I am now well in on
the pump screw, much further than another Mintor 1.70 flier running the same
fuel, and a long way past flush with the screw housing. The mid-range needle
is also on the rich side of the setting.

        Any suggestions would be appreciated. The lines have all been
checked, and they are fine (pretty much new anyway). The tank clunk is free,
and the vent line is clear. Is it possible the backfire issue is in fact a
too rich mixture, and I'm chasing the problem the wrong way?

        It's getting frustrating, as the engine is great in many other ways
- very easy to start, phenomenal power, good throttle response. I'm running
a 17x13 prop (soon to switch to the new 18.1x10) on an Aeroslave carbon pipe
set approx ¼ to ½ inch longer than the Aeroslave recommended length, with
Cool Power 15% for fuel.

Tim Pascoe

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