Thanks for the video. These questions pertain to this carb on the ROK engine. 1) Adjustment of idle screw. What is the goal? For the engine to easily idle on its own? 2) Adjustment of the air screw. What is the goal? How do we know its in the correct position? 3) Other than ROK Cup specs, is it necessary to change the emulsifier tube based on density altitudes? 4) Looking at an app for tuning this carb for the ROK, it seems that the needle is always K3 and the outer and inner idle jets are always B65/65, regardless of density altitude. Does this sound right? Similarly does the choke circuit jet need to be changed based on density altitude? Thanks again.
I thought the second groove from the top with the washer under was P1 1/2. I thought P2 1/2 was on the third groove from the top with the washer under.
Those outlets are not for the oveflow, it is for air venting to equalize the carb. Some VHSH carburetor models have a float bowl with an over flow tube, however, this one does not.
Cool! The vent hose is not needed to go to free air? On my VHSH cs carb there is one hose on each nipple going to free air, using a tube with sufficient lenght connected to both nipples is good enough ventilation?
Thanks for the video. These questions pertain to this carb on the ROK engine.
1) Adjustment of idle screw. What is the goal? For the engine to easily idle on its own?
2) Adjustment of the air screw. What is the goal? How do we know its in the correct position?
3) Other than ROK Cup specs, is it necessary to change the emulsifier tube based on density altitudes?
4) Looking at an app for tuning this carb for the ROK, it seems that the needle is always K3 and the outer and inner idle jets are always B65/65, regardless of density altitude. Does this sound right? Similarly does the choke circuit jet need to be changed based on density altitude?
Thanks again.
Hello together,could you describe if it is a ratio between outer pilot jet and idle jet existing?
I thought the second groove from the top with the washer under was P1 1/2.
I thought P2 1/2 was on the third groove from the top with the washer under.
why is the overflow hose connected to each outlet? what happens to the fuel if the carb overflows ?
Those outlets are not for the oveflow, it is for air venting to equalize the carb. Some VHSH carburetor models have a float bowl with an over flow tube, however, this one does not.
thanks
Cool! The vent hose is not needed to go to free air? On my VHSH cs carb there is one hose on each nipple going to free air, using a tube with sufficient lenght connected to both nipples is good enough ventilation?
You can't tell from the video, but the vent line is sliced open on the top. You do need free air to this carb for it to work properly.
Nice, thanks alot!