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clownkiller
clownkiller Reader
6/29/13 5:10 p.m.

http://www.davesomcwarehouserepair.com/

had 20 plugs in stock July 2012.........

SyntheticBlinkerFluid
SyntheticBlinkerFluid UberDork
6/29/13 8:00 p.m.

Holy Crap $90!!!!!!

drsmooth
drsmooth Reader
6/30/13 12:04 a.m.
SyntheticBlinkerFluid said: *Edit- I found a picture of my Johnson

Yeah, I found a picture of my Johnson too.. But it is too big to fit on most computer screens. Even if it would fit, I wouldn't post it here.

Davie
Davie
4/1/19 11:14 a.m.

I have 7 of them

Mazdax605
Mazdax605 UberDork
4/1/19 2:09 p.m.
Davie said:

I have 7 of them

Not sure if cruel April fools day joke or serious. Holy zombie thread by the way!!

Davie
Davie New Reader
4/1/19 2:30 p.m.

Lol not a joke (248)821-3283 call or text I have 6 new, 1 used

jstein77
jstein77 UltraDork
4/1/19 2:57 p.m.

You do realize that the search for the spark plugs occurred 8 years ago, don't you, Davie?

aircooled
aircooled MegaDork
4/1/19 3:12 p.m.

No, he has 7 Johnsons, and he's only used one of them....

fidelity101
fidelity101 UltraDork
7/26/19 1:18 p.m.

I'm reviving this thread again because I just bought one!!!!!!!!!!

 

sorry not sorry.

 

(hunting for manuals and parts details)

Curtis
Curtis GRM+ Memberand UltimaDork
7/26/19 4:25 p.m.

Going WAAAY back to the original question....

Look into Mercury outboard plugs used in the M70-M85 3-cylinder motors from the late 80s.  They use a short reach, surface gap plug just like the one pictured.  Being a 2-stroke, it might have a bit hotter electrode, but I would venture a guess that in a Wankel, hot isn't the end of the world.

ShawnG
ShawnG PowerDork
7/26/19 5:26 p.m.

Could you not use a spark plug anti-fouler to step the plug out of the housing and then run a conventional spark plug?

No Time
No Time Dork
7/26/19 6:18 p.m.

How come no one has used one of these engines to make a rotary Formula  500?

Knurled.
Knurled. GRM+ Memberand MegaDork
7/26/19 6:50 p.m.
fidelity101 said:

I'm reviving this thread again because I just bought one!!!!!!!!!!

 

pics or ban

SyntheticBlinkerFluid
SyntheticBlinkerFluid UltimaDork
7/28/19 10:49 p.m.

Holy crap Zombie Thread, MY zombie thread. I still have mine in a shed at my grandmas, but I haven’t touched it in years. 

fidelity101
fidelity101 UltraDork
7/29/19 1:29 p.m.

Apexcarver
Apexcarver UltimaDork
7/29/19 1:31 p.m.
No Time said:

How come no one has used one of these engines to make a rotary Formula  500?

Because class rules only allow certain motors, not a blanket "any snowmobile two stroke" New motors are brought in when parts get difficult for old ones, so allowing this would defeat the purpose.

fidelity101
fidelity101 UltraDork
7/29/19 2:20 p.m.

apparently these have unobtainium 12mm spark plugs which is the issue and I am having issues finding even a spare set. The trick is people when rebuilding these just bore em out to 14mm and run std rx7/rx8 plugs since they are surface gap as well. 

I did find someone about 2hrs north of me with 2 of these sleds and a spare engine as good donor vehicles/parts sleds. Not sure with that if I can make the death kart and keep one as an actual sled but we shall see. 

I have rally car things and truck stuff to finish first. 

No Time
No Time Dork
7/29/19 3:05 p.m.

In reply to Apexcarver :

It clearly wouldn’t meet class rules, and I wasn’t suggesting it for that purpose.

The question was only to suggest the potential for making a rotary powered F440/F500 chassis. 

joly0022
joly0022
12/12/20 11:24 a.m.

Reviving this.. Boy what a different world we lived in when it was started.

Im also on the hunt for UP-77V plugs. I inherited my grandfathers 73 RC35 that he bought new. It hasn't run in a couple years and here I am... Same dilemma as the other OMC Rotary owners in regard to the plug... 

 

drsmooth
drsmooth HalfDork
12/13/20 6:06 p.m.

This thread must be the king of the Zombie threads. I lost count of gow many times it was revived. 

Mr_Asa
Mr_Asa SuperDork
12/13/20 6:59 p.m.

I knew about these, I didn't know they were rotary engines though.  Neat

96sohc
96sohc
12/20/20 12:37 p.m.

In reply to joly0022 :

Very cool sled. I have two '73 rotaries, an evinrude RC35Q "Quiet" and a Johnson Phantom. They were top of the line for the time. The plugs are hard to come by as stated BUT they are also very rugged and don't foul easy. I would just take it out and clean it first. 

96sohc
96sohc New Reader
12/20/20 12:38 p.m.

In reply to 96sohc :

Shetlen
Shetlen
5/20/22 12:58 p.m.

I'm going to Zombie this thread back to life. I'm currently looking for a 45hp motor to buy, is anyone is willing to sell/ship me one? Thanks in advance! 

Davie
Davie New Reader
6/19/23 11:38 a.m.
fidelity101 said:

I'm reviving this thread again because I just bought one!!!!!!!!!!

 

sorry not sorry.

 

(hunting for manuals and parts details)

I have parts and manuals. What parts are you looking for? Call or text (248)821-3283

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