MarkR

Thanks everyone. I'm going to check all these ideas out and let you know the outcome. I did notice last time I worked on carb that one of the mounting bolts would not tighten up properly may be stripped and that maybe where the air leak is. Power loss came after carb rebuild so there might still be a blockage somewhere

Thanks everyone. I'm going to check all these ideas out and let you know the outcome. I did notice last time I worked on carb that one of the mounting bolts would not tighten up properly may be stripped and that maybe where the air leak is

thats exactly what I'm trying to avoid😃and my own😙

Hi Datzenmike The engine is an L18 petrol. Not loosing any coolant and the oil is not milky The spark plugs were only sooty after I did the carb. The fuel mix was too rich and initially I did have the jets swapped around. The carb kit came with a 100 for primary and the original was 102 which I eventually put back, secondary is a 170. Even after all this and adjusting fuel mix the engine wants to die when I try to pull off. The carb has a manual choke and is operating properly I intend to do a compression test and recheck the valves when I get back to the farm in a few weeks just trying to plan ahead at the moment and get some starting points. Thank you

Thanks Jagman. will do in a couple of weeks when I'm back on the farm. I do suspect there is a valve that's either not seating properly or is chipped, had that before on no 2 cylinder.

Hi all, I have a 1980/81 Datsun 720 4x4 single cab that I have restored. Recently I started experiencing starting problems which has led to now other problems. So let me explain: Initially vehicle would start easily when cold and run fine but once hot very difficult to restart and would take several repeated cranks to finally start. I then changed the ignition coil but no real change. Then I took off the Carb , stripped and cleaned it, bought a carb kit and replaced all the jets etc refitted carb. Vehicle ran but not well and spark plugs were sooty, tried various adjustments no real change, reset valves and points but still no power could barely pull off. Replaced spark plugs and leads no change. I am now at my wits end!!! Could a valve be broken or stuck? Is there still a blockage or something wrong with the carb? What I have noticed is if I pull the spark plug leads off while the vehicle is idling there doesn't seem to be any change in the engine on number 4 cylinder or very slight. Could this indicate the problem? Should I pull the carb off again and strip it and clean it again or pull off the head to check the valves. Any advice would be appreciated

Hi, I have a 1980/81 Nissan 720 4x4. I have cleaned out the old oil, radiator, replaced the plugs, oil and air filters, cleaned the carb and reset the valves and points. Engine starts but I had to set the manual choke a little closed to keep it idling, engine revs but has a flat spot sometimes coughs through carb or backfires. when I switch off it runs on for a few minutes then dies (dieseling?) anti dieseling solenoid not connected it has no wires. Then i checked timing and discovered that the timing mark is after TDC by about 15 degress and I cant adjust the distributor. Is the timing chain perhaps misaligned or the distributor. I really would not like to take the front cover off unless I really have to. Any advise would be appreciated