Specifications

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www.altfuelconv.com website

info@altfuelconv.com email

1100 King Rd P.O Box 351330

Toledo,Ohio,43635-1330

The AltFuel Green Conversion Kit is engineered for use on only engines that are in excellent

running order. Due to the characteristics of propane vapor fuel engines that may run ok on

gasoline but have underlying problems will not run as well on propane. Engines that have lowered

compression due to wear will run near full power on gasoline but will not be able to make full

power on propane vapor due to compression loss.

AltFuel does not recommend the conversion of engines used in a commercial setting that have

over 500 hours unless the engines have been excellently maintained and have near factory

compression.

The AltFuel Green Conversion kit will not fix problems that already exist in an engine.

The AF2 Regulator System is designed to easily convert all overhead cam (OHC) and overhead

valve (OHV) engines by utilizing an Intake Adapter placed behind the carburetor to deliver

propane vapor fuel. The correct Intake Adapter for the engine being converted will need to be

selected from our easy to use list.

Do not use MAPP gas or MAPP gas cylinders (tall slender tanks) on the AltFuel Green Conversion Kit.

Thank you for purchasing the AltFuel Green Conversion Kit

The AltFuel Conversion Kit Model 2 consists of 3 to 4 key components, depending on the engine:

1) Regulatorsystemwith1regulatorassembly,3zipties,1AltFuel“NoGas”sticker,and1set

of Model 2 instructions

2) ¼”certifiedrubberLPfuelline(customlengthdependentonapplication)

3) Aluminum adaptor plate (dependent on engine model)

4) 1 restrictor plug is needed for 23-45 hp only

General Notifications

Any engines you intend on converting to propane fuel should be run on gasoline before

the installation of the AltFuel conversion system to ensure the engine is running correctly.

NOTE: Please check engine with applicable tachometer to make sure the engine is set at

the factory recommended speed settings.

If the engine is not running correctly please resolve the problems before installation of

the AltFuel Conversion System.

NOTE: If you are not sure how to adjust valves, adjust governors, or anything else

pertaining to basic engine knowledge, please contact your local industry certified

technician for assistance.

***PATENT PENDING***

Green Conversion Kit for Small Engines AF2

Summary of content (27 pages)

PAGE 1
www.altfuelconv.com website info@altfuelconv.com email 1100 King Rd P.O Box 351330 Toledo,Ohio,43635-1330 Green Conversion Kit for Small Engines AF2 The AltFuel Green Conversion Kit is engineered for use on only engines that are in excellent running order. Due to the characteristics of propane vapor fuel engines that may run ok on gasoline but have underlying problems will not run as well on propane.
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Prior to Installation For best engine life and performance, we recommend you check your oil and replace it with a highgrade synthetic blend of motor oil applicable to your engine before installing the AltFuel Green Conversion Kit. Any engine that you intend on converting to propane fuel should be in good running condition before attempting to install this kit. Check compression. Compression must be above 120psi.
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Warnings The AltFuel Green Conversion kit is engineered for use on only engines that are in excellent running order. Due to the characteristics of propane vapor fuel engines that may run ok on gasoline but have underlying problems will not run as well on propane. Engines that have lowered compression due to wear will run near full power on gasoline but won’t be able to make full power on propane vapor due to the compression loss.
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Installation Instructions Makita/Dolmar/Robin 4-Stroke Backpack Blower Note: Due to changes in O.E.M configurations and application/engine configurations the Intake adapter or Orifices may need to be slightly altered for best fit and performance. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Close gasoline on/off valve if available or empty gas tank of gasoline. Start engine and run until all gasoline is consumed from the carburetor. Disconnect spark plug(s).
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Installation Instructions Honda GX25/GX35 1-2Hp Note: Due to changes in O.E.M configurations and application/engine configurations the Intake adapter or Orifices may need to be slightly altered for best fit and performance. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. Close gasoline on/off valve if available or empty gas tank of gasoline. Start engine and run until all gasoline is consumed from the carburetor. Disconnect spark plug(s).
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Engines 3-45Hp If you have one of the following engines listed below please see page 11 Specialty Engines. Kohler 16211-ZL8-000 or 4185306-S or 1205301 Briggs 130000 Series Utility Engine (Tillers, Go-Carts, Pump, etc.) Tecumseh 16211-ZL8-000 (5HP-11HP engines for generators, log splitters, etc.) Kawasaki (V-Twin Engines) AF1-792295 FX751V, FX801V, FX850V, FX921V Note: Due to changes in O.E.
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Restrictor Plug Installation for engines 23-45hp Single or V-twin with canister air filter assembly 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Remove mushroom cap on canister air filter assembly. Install restrictor plug in canister opening. Reinstall mushroom cover and tighten clamp. Start engine and warm up for 1-2 minutes (Please see page 16 for starting instructions) Move the throttle to fastest position. Check engine speed with applicable tachometer.
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Mounting of AF-2 Regulation System The following template is a drawing of the mounting plate of AF-2. Step 1: Step 2: Step 3: Step 4: Step 5: Cut out the template Place paper template on a desired location Trace template onto desired location Drill 2 holes in the desired location Mount the AF-2 Conversion system Additional parts needed: 2 ¼ 28 screws to desired length Drill ¼ 28 drill bit Sharpie marker If your engine is 10hp or higher, the regulation system must be mounted vertically.
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Cylinder Bracketing Installation Zero Turn Mowers Recommended Propane Cylinders Tank Fitting and Lines Bracketing Installation on Application Materials needed 33.5LB and 45.5LB vapor service horizontal cylinder, or 33.5LB and 43.5LB in vertical position with vapor service valve installed Left hand ACME 33LB horizontal cylinder bracket. Part AF1-33LB Option 1: Remove gasoline tank and extend bases to accommodate 33LB bracket. Option 2: Mount horizontally to rear of Roll-Over Protective Structure.
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ATV/Off-Road Vehicles Recommended 14LB Cylinder Propane Cylinders Tank Fitting Right Hand ACME and Lines Bracketing 33LB Horizontal Cylinder Bracket AF1-33LB Bracketing Notes 33LB Horizontal Cylinder bracket will need to be modified to fit the 14LB cylinder. Bolt to stable a and sound Flat steel Installation on N/A Custom Application Materials needed (4) 3/8” x 3” bolts and lock washers and nuts. Or use (4) 3/8” UP bolts 3” x 3”.
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Generators Recommended Propane Cylinders Tank Fitting And Lines Bracketing Installation on Application Materials Needed Any Cylinder N/A N/A N/A N/A Golf Carts and Utility Vehicles Recommended Propane Cylinders Tank Fitting and Lines Bracketing Bracketing Notes Installation on Application Materials needed 14LB/33LB Cylinder Horizontal Vapor Right Hand ACME . Left hand ACME AF1-33LB 33LB Horizontal cylinder bracket. Will need to be modified to fit the 14LB cylinder.
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Lawn Tractors Recommended Propane Cylinders Tank Fitting And Lines Bracketing Bracketing Notes Installation on Application Materials Needed 20LB Aluminum/Steel Cylinder/33LB Cylinder Horizontal Vapor Left Hand ACME fitting. Right hand ACME fitting. 33LB Horizontal Cylinder Bracket AF1-33LB. 20LB Vertical Cylinder Bracket AF1-20LB 33LB Horizontal cylinder bracket will need to be modified to fit the 14LB cylinder. Bolt to stable sound Flat steel. N/A Custom (4)-3/8”x3” bolts and lock washers and nuts.
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Lot Blowers Recommended Propane Cylinders Tank Fitting And Lines Bracketing Bracketing Notes Installation on Application Materials Needed 1LB Cylinder (short fat) or 5LB Cylinder 1LB direct mount to Regulator System. 5LB uses AF1-120-24 1LB direct mount to Regulator System. 5LB uses AF1-120-24 Remove pin from bracket. Place collar of 5LB cylinder over plastic bushings. Push pin through hole in cylinder collar and over bracket between plastic bushings.
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Water Pumps Recommended Propane Cylinders Tank Fitting And Lines Bracketing Bracketing Notes Installation on Application Materials Needed Any Cylinder Recommended Propane Cylinders Tank Fitting And Lines Bracketing Bracketing Notes Installation on Application Materials Needed 1LB Cylinder (short fat) N/A N/A N/A N/A N/A Weed Trimmers 1LB direct mount to Regulator System None N/A N/A N/A Wood Chippers Recommended Propane Cylinders Tank Fitting And Lines Bracketing Bracketing Notes Installation on Appl
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Checklist Before Starting Your Newly Converted Propane Engine: ⃝ I have read and fully understand all warnings and disclaimers concerning converting and operating my engine with the AltFuel Green Conversion Kit installed. ⃝ “No Gasoline” sticker has been placed on the gas tank or in a visible location on the engine. ⃝ Engine oil is new or good condition. ⃝ Spark plug has been cleaned and gapped to .035-.040 or is brand new and gapped to .035-.040.
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Fueling Small Engines with Propane The AltFuel Green Conversion Kit and its components are designed to be fueled with VAPOR propane gas. The use of fuels other than vapor propane is strictly prohibited and may damage the components of the Green Conversion Kit or engine. AltFuel LLC will not be healed responsible for damage to AltFuel products or engines where liquid propane or other fuels have been used with the AltFuel Green Conversion Kit.
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Starting Engines 3-13hp Cold Start: 1. Close choke. 2. Throttle half open. 3. Fuel Control Valve 1⁄2 turn. 4. Prime 2 seconds. 5. Start. 6. After start and warm up adjust Fuel Control Valve to optimum power setting according to use. 7. If the engine will not start, please repeat the installation that applies to your application. Do not over-prime. Stop priming when resistance is felt on the primer. Forcing the primer will damage the regulator and is not covered under warranty. 8.
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Starting Engines 15hp+ Single Cylinder *All safety switches must be in place and in working order according to OEM specifications* Cold Start: 1. Close choke. 2. Throttle half open. 3. Fuel Control Valve 1⁄4-1/2 turn. 4. Prime 2 seconds. 5. Start. If the engine will not start, please repeat the installation instruction that applies to your application. Do not over-prime the regulator if it is over-primed because the lever within the regulator will break and ruin the regulator.
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Starting Engines 15hp+ Twin Cylinder *All safety switches must be in place and in working order according to OEM specifications* Cold Start: 1. Close choke. 2. Throttle half open. 3. Fuel Control Valve 1⁄4-1/2 turn. 4. Prime 2 seconds. 5. Start. If the engine will not start, please repeat the installation instruction that applies to your application. Do not over-prime the regulator if it is over-primed because the lever within the regulator will break and ruin the regulator.
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Starting Engines 23hp – 45hp with Restrictor Plug *All safety switches must be in place and in working order according to OEM specifications* Cold Start: 1. Turn on tank 2. Turn fuel control valve 1 turn 3. Push primer button for 2 counts to purge line of air and fill with fuel 4. Set throttle at highest position 5. Start engine. If the engine will not start, please repeat the installation instruction that applies to your application.
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Specialty Engines Kohler 16211-ZL8-000 or 4185306-S or 1205301 Remove carburetor and studs; replace studs with 41/4”long studs. Install intake adapter between engine and carburetor, bend flywheel cover in intake area to accommodate hose. Use gaskets on both sides of intake adapter. Install Intake Adapter with hose in forward down position. Briggs 130000 Series Utility Engine (Tillers, Go-Carts, Pump, etc.) Remove carburetor, top mount bolts, leave bottom mount bolt loose.
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Troubleshooting Please have the following information before contacting the Distribution/Manufacture Tech Line: ⃝ Model & serial Number Off of the engine ⃝ Compression test results ⃝ Compression ratio ⃝ Engine RPM under load ⃝ Top Idle setting ⃝ Leak down test number ⃝ Experience under load time and normal use Common problems If the Regulator System of your conversion kit is frosting or icing up during use stop the engine and close the valve on propane cylinder(s).
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Weekly Maintenance Schedule Normal engine maintenance should be performed routinely with the AltFuel propane conversion kit the same as if it was running on gasoline. ⃝ Check spark plugs when oil or air filters are changed. Replace if necessary. ⃝ The stock spark plugs used in gasoline utility engines rely on the carbon in gas to help arc the plug which does help plugs last longer.
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Recommended Operational Instructions Warning: The following Recommendations are from the O.E.M. They can also be found in your operator’s manual from the O.E.M. The same rules apply for your Propane Applications. Caution: If you encounter tall/wet grasses or weeds. Cutting should be done with the mower deck set to its highest position. Note: When you encounter tall/wet grass or weeds. You will notice a slight loss in RPM on propane or gasoline.
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Refueling the engine NEVER ALLOW SMOKING OR BE NEAR AN OPEN FLAME WHEN MAINTAINING THE FUEL SYSTEM ON THIS ENGINE. Always handle LP with care. LP is a safe but highly flammable fuel. • Always close valves on cylinders when not in use. • Use only cylinders that meet Code #49 of the federal regulations #173.34. • Use only LP fuel. • Never attempt to remove an LP cylinder while mower is running. • Cylinders must be filled by trained personnel only.
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Limited Warranty AltFuel warrants that all equipment manufactured by it be free from defects in material and workmanship under normal use and service when installed and used in accordance with all applicable state and local laws and regulations. Defects in material or workmanship shall be corrected, at the option of AltFuel LLC, by repair, replacement or refund.
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Cut out around edges and return to the store where you purchased the unit. Complete a warranty card for each unit purchased.