1966 datsun forklift nissan motor 1.4l straight 4 massive fuel issue we cleaned everything out new carbe kit in fuel flow is good now

Nissan Forklift Engine parts guides TIFFIN PARTS

I have an old Datsun forklift with a Nissan H20 engine that won't start.
I popped the distributor cap and the distributor is not turning when I crank the engine .
What is broken?

It might be a partially clogged fuel filter. It should be changed every 30,000 miles.

Have you tried spraying carb cleaner or straight fuel in carb and try to start. this will show if it is a fuel issue. You also may have to adjust the carb if it has a high and low or idle screw. Also could be the kill switch. How about the fuel lines are they connected correctly and is the fuel filter connected correctly.

Hello
Your gas tank petcock is diaphram operated.
there is a vacuum line coming off the intake, that goes straightb to the petcock.
when you turn the motor over a vacuum is created, pulling the petcock diaphram back and allowing fuel to flow to your carburetor. when you turn the motor off the vaumm is gone and the spring behind the diaphram pushes it closed and stops the fuel flow to the carbs.

Now the reason the carbs are overflowing is because the floats valves are not closing, in other words the floats are sticking.
Usually a good carb clean will cure the problem, especially for that year.
the older ones usually require new float valves/seats that are usually found in a good carb rebuild kit. You shouldn't need one.

If your really broke try tapping on the bowls of the carburetor lightly, while the engine is running, sometimes the vibration will vibrate a particle loose that may be holding open the float valve.
if it works then the fuel should stop overflowing while running.

if you know how to work on it, try this, with the engine off.
open the carburetor drain screws so that fuel will run out the carb. drain. flush out the carb.
get a container to catch the gasoline.
while fuel is flowing tap the carb bowls a few times then closed the drain screws.
clean up any spilled gasoline .
start your bike.see if they stop leaking and the floats are closing.
if it still leaks, you'll need the cleaning.

Happy Riding
Best Regards
Big Al

how many lines run into the carb or come out of the gas tank maybe you got them mixed up

-How about spark plug...? Did you change as well...?
-Make sure turn on the gas line.
-Try again.

Good luck. It's closed for garden time.

Mai

buy or rent a manual on your motor

It sounds like the float is sticking in the carb. Since the carb is higher than the fuel tank it pulls the fuel in by vaccum of the engine. when running at high rpms, it can burn the fuel thats flowing into the carb, when you idle down, the bowl of the carb is filling up with fuel faster than the engine can burn it and causing it to flood. Then when it shuts off at idle it does not want to start back up because it is flooded. To make a long stary short, pull the carb and give it a good cleaning and your problems should be solved.