Today's Message Index:
----------------------
1. 04:41 AM - Re: spark plug caps for 912UL (Thom Riddle)
2. 05:20 AM - Re: Re: spark plug caps for 912UL (Hugh McKay)
3. 06:12 AM - Re: spark plug caps for 912UL (Catz631@aol.com)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: spark plug caps for 912UL |
If you end up with the type caps that are sized for the plugs with the screw-on
tips in place, you can buy the screw-on tips separately, or take them off of
NGK plugs that are sold at most automotive stores.
FWIW, Jabiru engines use 12mm NGK plugs but a different series than Rotax. Jabiru
plugs have the screw-on tips.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
no engine
FOR SALE
Diamond Katana DA20-A1
Rotax 912 F3
Don't worry about old age... it doesn't last very long.
- Anonymous
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=392406#392406
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: spark plug caps for 912UL |
Many thanks for the link to the NGK Resistor Covers. From the information
shown the letter code for the proper cover for the threaded end of the
DCPR7E spark plug is the letter F. Do you agree?
Hugh G. McKay III, P.E.
Allegro 2000
N661WW
Rotax 912 UL
-----Original Message-----
From: ledson
Sent: Tuesday, January 15, 2013 2:43 PM
Subject: RotaxEngines-List: Re: spark plug caps for 912UL
Hugh,
I've attached a part number buildup guide from NGK so that you can see how
the part numbers are assigned. By using the guide you can determine the
specification for each resistor cover.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=392369#392369
Attachments:
http://forums.matronics.com//files/resistor_covers_535.pdf
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: spark plug caps for 912UL |
Thanks for all of your replies !
The reason I replaced the spark plug wires was due to a miss on my left
mag. It was misfiring badly !
On two previous occasions I had breaks in the red coil wire from the
back of the engine (coil power to the module) and thought that it had broken
again but that was not the case,
I switched modules and the problem remained on the left mag (A module in
my case)
I then decided to change the HD wires as I do have an old engine (the
wires have 1992 printed on them) The spark plugs were changed on the A plugs
but that didn't help either. I also checked the resistance on the dual coils
(secondary) and that was good.
I also decided to check the caps for resistance and found them all in the
Rotax specs except for one (4400-6000 ohms) They were all at the low end
however (about 4500)So now I will be changing the caps also.
The wire ( aprox 16ft) was about $35 a meter from Rotax and the caps
about $50 ea ! I believe that aprox $575 is a bit much to pay for a new spark
plug harness !!!
Anyway I was able to get Rotax wire from Spruce for $1.17 a foot and
ended up buying 8 caps for $47 including shipping (the price for 1 from Rotax)
The caps I ordered were VDO5EMH vs the "F" plugs that originally came with
my engine. They are identical except they take the round vs threaded end
which should be no problem according to a local Rotax guru . The plug numbers
are the same (except for the solid tip) and as a side note the plugs are
also used on Harley's so there should never be a problem getting them.
I should have waited to order as a member wrote me and gave me a location
to buy the "correct' plug caps for $6.30 ea. I did order one of them to
replace the one that is way below limits.
I will replace all the caps when they arrive.
In the meantime,I ran the engine with the new plug wires and the mag drop
is gone !! Yeaaahhh !
I was curious as to why the 5000 ohm resistor caps are so important.
(Electrics are my weak area)
One of the sites said:
"Resistor Covers May Be Required for Power Sport Applications When Spark
Plugs Alone Don't Provide Sufficient Noise Suppression.
Designed to Reduce Electro Magnetic Interference and Radio Frequency
Interference, Which can Interfere with Electronic Ignition Components, Causing
Misfires and Poor Engine Performance."
So there you go...that's the reason ! (learn stuff every day !)
Again , thanks for all your help !
Dick
Maddux
Milton,Fl
Kitfox 4
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|