Today's Message Index:
----------------------
1. 01:26 PM - Re: Re: Spark plug analysis at 50hrs (David Weaver)
2. 02:55 PM - Re: Re: Spark plug analysis at 50hrs (Matt Tucciarone)
3. 04:55 PM - Re: Re: Spark plug analysis at 50hrs (Pete Christensen)
4. 08:04 PM - Re: Re: Spark plug analysis at 50hrs (Joel M.)
Message 1
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| Subject: | Re: Spark plug analysis at 50hrs |
New spark plugs every 100 hours suggests that you are trashing a lot of goo
d spark plugs.
Without any sign of gas leakage around the porcelain insulator or electrode
erosion I would not arbitrarily trash low time spark plugs that are functi
oning.- Unless one is running a very lean mixture, the Rotax 912 has a lo
w energy spark so electrode erosion over time should be minimal.- I have
found that Iridium electrode plugs in a mechanically sound-auto engine ma
y only require re-gaping every 100,000 thousand miles depending energy leve
l of the spark.- Just an opinion from individual with over 50 years of ex
perience working on vehicles belonging to me and others.
Dave Weaver
--- On Mon, 5/2/11, Roger Lee <ssadiver1@yahoo.com> wrote:
From: Roger Lee <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Spark plug analysis at 50hrs
The recommended plug gap is .023 to .027
Usually the narrow gap is better for cold weather. The narrow plug gaps do
aid in starting when cold, but usually the wider gap is better for summer r
unning. It won't hurt to have a narrow gap in the hotter months, but it doe
s tend to run better with a wider gap for hotter weather. If you are changi
ng your plugs between 75-100 hours the gap shouldn't change but slightly. I
f you leave them in longer then they should be cleaned and re-gapped. I nev
er leave a plug in longer than 100 hours.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080- TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=338708#338708
le, List Admin.
Message 2
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| Subject: | Re: Spark plug analysis at 50hrs |
I have 150 hours on mine. I checked the gap at annual and they were
still fine. 912uls
From: David Weaver
Sent: Tuesday, May 03, 2011 4:21 PM
Subject: Re: RotaxEngines-List: Re: Spark plug analysis at 50hrs
New spark plugs every 100 hours suggests that you are trashing a
lot of good spark plugs.
Without any sign of gas leakage around the porcelain insulator or
electrode erosion I would not arbitrarily trash low time spark plugs
that are functioning. Unless one is running a very lean mixture, the
Rotax 912 has a low energy spark so electrode erosion over time should
be minimal. I have found that Iridium electrode plugs in a mechanically
sound auto engine may only require re-gaping every 100,000 thousand
miles depending energy level of the spark. Just an opinion from
individual with over 50 years of experience working on vehicles
belonging to me and others.
Dave Weaver
--- On Mon, 5/2/11, Roger Lee <ssadiver1@yahoo.com> wrote:
From: Roger Lee <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Spark plug analysis at 50hrs
To: rotaxengines-list@matronics.com
Date: Monday, May 2, 2011, 10:37 PM
<ssadiver1@yahoo.com>
The recommended plug gap is .023 to .027
Usually the narrow gap is better for cold weather. The narrow
plug gaps do aid in starting when cold, but usually the wider gap is
better for summer running. It won't hurt to have a narrow gap in the
hotter months, but it does tend to run better with a wider gap for
hotter weather. If you are changing your plugs between 75-100 hours the
gap shouldn't change but slightly. If you leave them in longer then they
should be cleaned and re-gapped. I never leave a plug in longer than 100
hours.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtophref="http://www.matronics.com/Navig
ator?RotaxEngines-List" target=_blat also available via the Web nbsp;
-Matt matronics.com/contribution"
target=_blank>http://www.matronics.com/contri=========
======
Message 3
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| Subject: | Re: Spark plug analysis at 50hrs |
But isn't the gasket only good for about 4 times for removal and
replacement?
Pete
On 5/3/2011 3:21 PM, David Weaver wrote:
> New spark plugs every 100 hours suggests that you are trashing a lot
> of good spark plugs.
> Without any sign of gas leakage around the porcelain insulator or
> electrode erosion I would not arbitrarily trash low time spark plugs
> that are functioning. Unless one is running a very lean mixture, the
> Rotax 912 has a low energy spark so electrode erosion over time should
> be minimal. I have found that Iridium electrode plugs in a
> mechanically sound auto engine may only require re-gaping every
> 100,000 thousand miles depending energy level of the spark. Just an
> opinion from individual with over 50 years of experience working on
> vehicles belonging to me and others.
> Dave Weaver
>
> --- On *Mon, 5/2/11, Roger Lee /<ssadiver1@yahoo.com>/* wrote:
>
>
> From: Roger Lee <ssadiver1@yahoo.com>
> Subject: RotaxEngines-List: Re: Spark plug analysis at 50hrs
> To: rotaxengines-list@matronics.com
> Date: Monday, May 2, 2011, 10:37 PM
>
> <ssadiver1@yahoo.com
> <http://us.mc827.mail.yahoo.com/mc/compose?to=ssadiver1@yahoo.com>>
>
> The recommended plug gap is .023 to .027
> Usually the narrow gap is better for cold weather. The narrow plug
> gaps do aid in starting when cold, but usually the wider gap is
> better for summer running. It won't hurt to have a narrow gap in
> the hotter months, but it does tend to run better with a wider gap
> for hotter weather. If you are changing your plugs between 75-100
> hours the gap shouldn't change but slightly. If you leave them in
> longer then they should be cleaned and re-gapped. I never leave a
> plug in longer than 100 hours.
>
> --------
> Roger Lee
> Tucson, Az.
> Light Sport Repairman - Maintenance Rated
> Rotax Repair Center
> Home 520-574-1080 TRY HOME FIRST
> Cell 520-349-7056
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtophref="http://www.matronics.com/Navigator?RotaxEngines-List"
> target=_blat also available via the Web nbsp;
> -Matt matronics.com/contribution"
> target=_blank>http://www.matronics.com/contri===============
>
>
> <http://forums.matronics.com/viewtopic.php?p=338708#338708>
>
> *
>
>
> *
Message 4
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| Subject: | Re: Spark plug analysis at 50hrs |
I change my plugs about every 600 hours.- Even then they still look good.
Joel
--- On Tue, 5/3/11, Pete Christensen <pchristensen10@austin.rr.com> wrote:
From: Pete Christensen <pchristensen10@austin.rr.com>
Subject: Re: RotaxEngines-List: Re: Spark plug analysis at 50hrs
=0A=0A =0A=0A =0A =0A =0A But isn't the gasket only good for about
4 times for removal and=0A replacement?
=0A
=0A Pete
=0A
=0A
=0A On 5/3/2011 3:21 PM, David Weaver wrote:=0A =0A =0A
=0A =0A =0A New spark plugs every 100 hour
s suggests that you are=0A trashing a lot of good spark plug
s.=0A Without any sign of gas leakage around the porcelain=0A
insulator or electrode erosion I would not arbitrarily=0A
trash low time spark plugs that are functioning.- Unless=0A
one is running a very lean mixture, the Rotax 912 has a=0A
low energy spark so electrode erosion over time should=0A
be minimal.- I have found that Iridium electrode plugs=0A
in a mechanically sound-auto engine may only require=0A
re-gaping every 100,000 thousand miles depending energy=0A
level of the spark.- Just an opinion from individual=0A
with over 50 years of experience working on vehicles=0A
belonging to me and others.=0A Dave Weaver
=0A
=0A --- On Mon, 5/2/11, Roger Lee <ssadiver1@yahoo.com>=0A
wrote:
=0A =0A
=0A From: Roger Lee <ssadiver1@yahoo.com>
=0A Subject: RotaxEngines-List: Re: Spark plug=0A
analysis at 50hrs
=0A To: rotaxengines-list@matronics.com
=0A Date: Monday, May 2, 2011, 10:37 PM
=0A
=0A --> RotaxEngines-List message=0A posted
by: "Roger Lee" <ssadiver1@yahoo.com>
=0A
=0A The recommended plug gap is .023 to .027
=0A Usually the narrow gap is better for cold weather. The
=0A narrow plug gaps do aid in starting when cold, but=0A
usually the wider gap is better for summer running. It=0A
won't hurt to have a narrow gap in the hotter months,=0A
but it does tend to run better with a wider gap for=0A
hotter weather. If you are changing your plugs between=0A
75-100 hours the gap shouldn't change but slightly. If=0A
you leave them in longer then they should be cleaned=0A
and re-gapped. I never leave a plug in longer than 100=0A
hours.
=0A
=0A --------
=0A Roger Lee
=0A Tucson, Az.
=0A Light Sport Repairman - Maintenance Rated
=0A Rotax Repair Center
=0A Home 520-574-1080- TRY HOME FIRST
=0A Cell 520-349-7056
=0A
=0A
=0A
=0A
=0A Read this topic online here:
=0A
=0A http://forums.matronics.com/viewtophref="http://www.
matronics.com/Navigator?RotaxEngines-List"=0A target=_
blat also available via the Web=0A nbsp; - - - -
- - - - - -Matt=0A matronics.com/contribution
"=0A target=_blank>http://www.matronics.com/contri=
==============
=0A
=0A
=0A
=0A =0A =0A =0A =0A
==============0A=0A
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