Thanks for the info. My intent is not to reverse engine rotation as I believe that would create many new issues. Some and I believe most engines have the crank offset slightly from true vertical of the cylinder so the downward push on the piston during the power stroke is more straight. Reversing the rotation the power stroke would be on the other side at a greater angle and more stress on the pistons and rods. Then there would be cam timing and timing chain issues as you said.

I have used a 2 gpm hydraulic pump on the front end of a 1972 1200cc engine through a love joy coupling for over 15 years at pressures of 2200 psi, to raise the boom on my windmill boom truck with no problems. You might calculate HP needed for that. Doesn't seem to load the engine much at all.

I plan to run a 12 KW power generator off the front end of a 1200cc Datsun engine. The generator requires CCW rotation so need to do it that way. Anyone have any long term concerns about doing this. I'm thinking a flywheel on the front end would take out vibrations that could be induced from the generator. Comments.

Looking to buy a 1200cc A12 engine in the US. I live in Nebraska.

windmilldave

I should have also said I disconnected the 12V to the choke so it is inoperative.

My original carb did not have the anti diesel cutoff, nor did the replacement. I believe that was for 1972 model only. It does not have any of the other add ons you mentioned. Yes. as mentioned previously all jets and bleeds are correct per the spec sheet.

Yesterday, I disconnected the throttle link arm to the auto choke and rotated the choke housing so the choke was just fully closed. Started the engine and the unloader opened the choke to the recommended opening. The engine now runs great at idle and high speed with choke about 90% closed. So I guess I will leave it that way for now. Not sure how the engine would performed using the power, accelerator, or secondary mode but since I don't need that it won't matter. As I said earlier the engine only needs to idle or mid throttle for working the 8000 lb. winch and the 2 gpm hydraulic pump.

I've already checked the vacuum advance line. I sucked on the hose going to the distributor and the advance works and holds. No leaks. Did the same to the choke unloader dash pot and it moves and holds. No leaks. Now that the engine runs smooth at idle should show no vac leaks. There are five functions to a carburetor. Idle, above idle to max throttle, power, accelerator pump and choke. Something is screwey when an engine idles but needs 90% choke to run above idle.

It warmed up today so installed the carb on the engine. After it warmed up I got the engine to idle real good. But when I advanced the throttle to fast idle or higher the engine will start to miss and stall. If I close the choke to about 90-95% it runs OK. So the fuel mixture is too lean. Same problem as before with the original carb. The fuel level in the sight glass stays right on the dot during this time so the carb is not starved for fuel, I'm at a loss. I could install a larger primary main jet and see what happens.

Thanks guys. I found a used carb on ebay, same model as mine for $30. I carefully disassembled it and compared the jet sizes, air bleeds etc. against what should be in there for a standard 1972 production A12 engine. All jets and bleeds matched against the chart you provided. Cleaned and blew out all passages. The accelerator pump check ball was missing and the choke unloader unit diaphragm was ruptured so used my old one that was good. While turned upside-down the primary emulsion tube fell out. Good deal. All holes were clean. The secondary tube wouldn't come out so figured it was OK. The secondary part of the carb is never used anyway as I never run the engine RPM high enough for it to open Installed a new carb kit and is now all reassembled. Waiting for zero degree weather to go away before I install on the engine and check it out. I don't use my windmill boom truck during the winter so it's parked in the non heated part of my building. I am using a electric fuel pump that I originally installed 14 years ago. It keeps the fuel level in the sight glass right on the center dot. I checked the fuel pressure at the carb inlet anyway after starting to have problems to see what it was doing and it was 2-3 psi.

With the cold weather I haven't had much chance to work on this. I did find another used carb. but would like to know what would be the jet sizes for a stock A1200 engine. Want to make sure while I have it apart. Primary/secondary slow jets? Primary/Secondary main air bleed? Primary/Secondary main jets? Thanks.

Finally getting back to the carb problem. I disassembled the carb again and tried to remove the emulsion tubes but no luck. I used a tat needle ground down to get inside the tube and pull up but neither pri. or sec. will budge. So looks like I'm in for a new carb. Damn. Been looking at some vendors on ebay that sell the Chinese carbs. I haven't had a chance to move my truck outside for the pics you guys wanted of the 1200 engine. But maybe this week.

Dave..