912 run rough on climb or heavy load

"Fuel Related

Anyway so to hopefully eliminate the fuel delivery options I ran new fuel lines and as a test ran a new fuel line from the suction side of the fuel pump into a jerry can of fresh high octane fuel. no change."

I am confused - To test for tank to carburettor (p[en hose) fuel delivery, I would expect that, each carburettor fuel line would be disconnected  (one at a time), pointed into a suitable receptacle, the Boost/Auxiliary electric pump  turned on and the time taken to deliver a significant quantity of fuel noted. Fuel quantity/time = flow rate

Where a fuel pressure gauge installed - the pressure noted (it should be nil or close to it).

If flow below expected :

 # And pressure above zero- possible partial blockage/restriction.

 # Pressure zero - pump problem.

"I ran a primer to the fittings on the bottom of the carb and tried that."

What is "a primer"  and is "the fitting on the bottom of the carb" the float bowl fuel inlet??

Perhaps you could rephrase and/or send a photo.

😈

I do not see any fuel pressure when the lines are open to a container. did not specifically measure the flow but if it were to burn that much fuel in that amount of time I would not get far.

A primer is basically a manual fuel pump used to 'squirt' fuel into a carb for the purpose of starting on engines with no choke. The bing 64 has a fitting at the front of the carb where it goes into the boot that allows for a primer fuel line connection. not really used on airplanes but it is there.. there is a small screw in the fitting but essentially the fitting is just an opening into the carb body. 

Thank you for the clarification Dave.

Sounds like plenty of fuel being delivered to the carburettors.

I am intrigued by the following;

"The bing 64 has a fitting at the front of the carb where it goes into the boot that allows for a primer fuel line connection. not really used on airplanes but it is there.. there is a small screw in the fitting but essentially the fitting is just an opening into the carb body. "

Are you refereeing to No.58 in the above diagram ?

OR

To inlet manifold, 10mm hex head screw, just in front of Balance Tube elbow fitting (- see photo below)?

😈

it is 58 in the diagram.. not sure if that is its intended purpose but it is just an opening into the carb body so I added a primer to that. I have seen posts of people doing that with starting issues although I do not have any problems like that. although I don't want to drift too far from the issue the primer did not seem to help and it is not something that I have connected for normal operation it was just for a test on the ground. 

Reference; Carburettor part 58 above;

Like you I do not know its purpose.

Speculation - its unlikly to deliver a correctly metered/air:fuel ratio so may not be very good for diagnostic evaluation.

Perhaps one of our Guru's would enlighten us ?????😈