422707-121401 sump gasket

[McTurff]

With the engine not running.
I looked a couple of my opposed twins full open throttle and full closed throttle.
full open throttle on the dash = (can feel the throttle lever shaft at the carb slightly forceful spring loaded to full open and some force required to force it too go to the idle position and will spring back full open when not held at idle.

As the throttle on the dash is moved from full open to full closed towards idle the carb shaft moves less than half way closed towards idle and is only slightly (very weak) spring loaded when at idle position.
Carb shaft just very slightly spring loaded. (not hardly any governor spring tension felt with throttle on dash at idle)

I suspect your throttle control plate or governor springs are not connected correctly or someone has installed wrong length connecting links.
You might have to remove the throttle plate from the engine and look behind at the springs or go to ebay and search opposed twin throttle plate and linkages, look at some pictures. I think maybe you could completely remove the little governor spring and your dash throttle would then without the engine running move towards idle. The holes in the governor spring linkages is too adjust the governor sensitivity so as the engine does not hunt and surge at governor speeds. (the stronger the spring force the more forceful the governor) The governor springs are also color coded per engine codes but I've never seen them very critical of operation by color when I'm making Frankenstein engines. (taking several opposed twins engines and throttle plates and making one)

Thanks all useful info
I just have to keep searching for answers !

 

[bentrim]

Just a quick question. Was the governor lever turned the right way when you put the sump back on?

 

[Forest#2]

A hint that yours will not idle with the engine running is you say the carb throttle shaft still feels strong spring pressure even with the engine not running and the on dash speed control set to low idle.

 

[bentrim]

With the engine not running there should be spring force trying to pull the throttle open. Yours according to the service manual has a "governed Idle" which does not allow the carburetor to close and touch the speed adjustment screw on the carb. It is designed to allow the operator to idle the engine and apply a load without the engine stalling. That is the second smaller, shorter spring that pulls on the governor arm.
Just another thought is you might remove the governor spring ( the one controlled by the dash lever) and see if it will idle then. You might also remove the governered idle spring and the lever should move freely and go immediately to idle when the engine starts. If that works you either have the wrong governor spring or it is hooked in wrong. If the engine still runs away -- time for surgery.

 

[Auto Doc's]

Unhook the throttle cable and move it by hand to see if it will pull it down to idle.

 

[McTurff]

Thanks everyone for all the great ideas!
I will continue to try all these suggestions and put them to practice hopefully don't have to open her up again but that's not to difficult!
If i do I put a new sump gasket in literally a week ago when I had it opened up!
Should I get a new gasket or would I be lucky enough to reuse that one??
No biggie just need to know if I have to go back down that road!
Thanks

 

[McTurff]

Just a quick question. Was the governor lever turned the right way when you put the sump back on?

I never changed or moved anything
So hopefully it was right

 

[McTurff]

Ok after further review
I have to take engine off and dive back in I have exhausted all tests!
So when I open it up again unless anything changed I will see what was an intact govenor
So what should I look for beyond everyone's suggestions?
Maybe governor arm is not in the right place or bent, thimble stuck ect!
The weights were all in place and pins the governor seemed to look correct!!
I have a new Governor should I just install it regardless of the old one looking good?
Anyway when I go in this time want to check everything so hopefully don't have to pull for 4th time!!

 

[McTurff]

Well im totally lost
New Governor in everything looked fine no bent arm the governor did come loose and keeper ring had come off so I don't know if that happened when I put back together last time
But there was absolutely nothing wrong with original governor
But put new one on to try it
Made sure it stayed on rotated engine slightly so camshaft and governor gear were good!
Put all back together
Same thing
WOT
ONLY way I can slow it down is to put a makeshift wire to governor arm and pull it to idle!
Very disappointed or im just completely missing something
It just seems like governor is not working and yes I reset it!