1.) The first and most important step is to make sure that you are using a propane tank that has been refilled multiple times. (at least 4 times.) Tanks that have not been filled multiple times
will have air trapped inside of them causing the fuel mixture in the carburetor to be too lean.
2.) If you are not using a tank regulator from USCarburetion make sure the regulator is low pressure (0.5 psi) if you have a low pressure kit and that it has a sufficient BTU rating. (10,000 Btu's per hour per horsepower (ex. 10 hp = 100,000 BTU's)
3.) Check that the pipe sizing is correct for your application. This will ensure a sufficient volume of propane for the engine to run properly.
Please take the time to properly understand what is required. This will save you time in the long run! A major issue we see is pipe size consistency; once the pipe size is reduced it cannot be increased.
“There is no such thing as a bell increaser, only bell reducers.” {Example having a 3/4" line reducing down to a 1/2" valve then going back up to 3/4" line.} Also if installing a shutoff valve please make sure it is a full bore valve.
Shutoff valves with red or yellow colored handles usually have a small bore that restricts fuel flow.
* Note pressure and volume are not the same. Having the correct amount of pressure is as important as having a system that does not cut down on the needed volume of fuel.
4.) The load-block adjustment is critical!!! It has to be tested 1 turn at a time in each direction. Typically for Propane it will be 5-7 full turns out. Some engines may take more turns or less turns but 5-7 is a base starting point.
Please do not be afraid of tweaking this adjustment to find the “sweet spot” where the engine performs the best.
Note: If all else fails there is an adjustment just above the inlet of the regulator called the Lock-off Adjustment (or zero governor adjustment). Take the first screw all the way out, it is just a dust cover. Underneath is the actual adjustment.
Turning the adjustment counterclockwise will cause the regulator to take less negative pressure (“vacuum”) to open the regulator. Turning the adjustment out too far can cause the regulator to allow fuel to flow through it even with the engine off.
You do not want this. To check for a leak apply soapy water to the end of the hose coming off of the outlet of the regulator. If it creates a bubble the turn the adjustment in until it stops creating a bubble.
To put the adjustment back to factory setting, come out all the way and then go back in 14 full turns.
5.) If the kit utilizes an adapter, please be sure the adapter is installed in the proper direction.
The larger opening of the adapter should be closest to the carburetor. If the kit utilizes the snorkel, make sure that the snorkel hose is not kinked as well as the snorkel probe that goes inside of the carburetor.
You should be able to blow through the snorkel with very little or no resistance.
* Note: If you have an automatic choke try disabling the choke and holding it all the way open with a zip tie or other device. The choke being closed can cause the engine to get too much fuel on start up.
Also try pressing the primer button for only 1 second. Holding the primer button in for a longer period of time can cause engine flooding. If you feel your engine is flooded (especially if you smell propane)
turn the tank off then crank the engine over a couple of times to burn off the excess propane in the engine combustion chamber.
Comments
0 comments
Article is closed for comments.