"Z" 1-1/2 to 6HP Spark Plug Models

This section covers "open-crankcase, sparkplug in head" models manufactured from late 1919 to the early 1930's. This list includes parts for:

1-1/2HP Disc or dishpan flywheels, hit & miss, battery and coil ignition, no needle valves in carb.

1-1/2HP Bosch oscillating magneto with 2 3/4" or 5 1/4" trip arm, two needle carb, two styles of cam-governor bracket, gears, and camshafts. If not a replacement, cam-gov. brackets are cast iron.

2HP Disc or spoke flywheels with gear driven "R" mag or may have "RV" or "J", two needle carb, pot metal cam-gov. bracket (Often broken or missing-our replacements are aluminum).

3-6HP Bosch mag, may have diagonal or straight cogs on gears, mag uses 2 3/4" trip arm, 1919-1924.

3-6HP "R", "RV", or "J" mag with pot metal cam-gov. bracket, straight cogs on gears.

5HP Style "B", most of the new parts we offer for the 3HP inter-change except for the head gasket and the piston rings (avaiable from ring list.) Cyl. bore on this engine is 4 3/4" compared to 4 1/2" for the 3HP.

7-1/2HP Style "B"-In comparing the 6HP and 7 1/2HP "B" part's book, there are a lot of subtle changes in the part #'s as if F/M was trying to make it appear as if the 7 1/2 was a completely different engine (being they upped the HP by 1 1/2), but we have found both have 5 3/4" pistons and it appears all the parts interchange. We suggest you order 6HP parts for this model.

NOTE: On any of these engines you should check the width of your rings before ordering replacements as later models and replacement pistons in early models had narrower ring grooves. Gov. weights also vary (check our drawings). Serial numbers are usually found on a boss on the top of the water hopper. Confused?-Please call.
Part# Description Price
L15 Inst. & Parts 1 1/2-6HP, Bosch, 5-1/4" Trip 4.40
L151 Inst. & Parts 1 1/2-6HP, Bosch, 2-3/4" Trip 4.95
L20 Inst. & Parts 1-1/2HP W/Battery Ign. 2.75
L14 Inst. & Parts 2-6HP, Gear Driven Mag 4.40
LS51 Sales Catalog 2-6HP with "R" Mag 5.50
L090 Inst. & Parts 5 to 7-1/2HP Style B 2.20
HM204 Bearing, Rod 1-1/2 to 2HP 37.50
HM170 Bearing, Rod 3HP 45.00
HM2041B Bearing, Rod 5HP (style 'B' w/4-3/4" bore) 47.50
HM171 Bearing, Rod 6HP 62.50
HM2043 Bearing, Main 1-1/2 to 2HP 38.25
HM172 Bearing, Main 3HP 56.00
HM173 Bearing, Main 6HP 72.50
HM2047 Bushing, Rod 1-1/2 to 2HP (for wrist pin) 20.50
HM2048 Bushing, Rod 3HP 22.50
HM2049 Bushing, Rod 6HP 27.50
HM205 Butterfly Throttle Assy W/Spring 1-1/2 to 2HP 53.10
HM2051 Butterfly Throttle Assy W/Spring 3HP 58.30
HM2052 Butterfly Throttle Assy W/Spring 6HP 58.30

HM206 Cam-Magneto-Gov. Bracket 1-1/2 to 2HP 181.50
HM2061 Cam-Magneto-Gov. Bracket 3-6HP 209.00
HM207 Carb Air Valve Disc 1-1/2 to 2HP 3.30
HM208 Carb Air Valve Disc 3HP 3.30
HM2081 Carb Air Valve Disc 6HP 3.30
HM209 Carb Air Valve Cover Plate, 1-1/2 to 2HP 17.50
HM2095 Carb Air Cap, Cast Iron, 1-1/2HP "battery" model 32.50
HM210 Carb Air Valve Cover Plate, 3-6HP 20.50
HM211 Carb Compensating Spring 1-1/2 to 2HP 3.30
HM212 Carb Compensating Spring 3-6HP 3.30
HM213 Carb Fuel Line Check Valve 4.50
HM214 Carb Fill Hole Cover 3-6HP 18.50
HM215 Carb Fuel Nozzle "Battery" Model 1-1/2HP 22.50
HM216 Carb Needle Valve, Start Side 1-1/2 to 2HP 18.90
HM217 Carb Needle Valve, Start Side 3-6HP 21.35
HM218 Carb Needle Valve, Fuel Side 1-1/2 to 2HP 18.90
HM219 Carb Needle Valve, Fuel Side 3-6HP 21.35
HM220 Carb Needle Valve Seat, Start Side 1-1/2 to 2HP 21.35
HM221 Carb Needle Valve Seat, Start Side 3HP 21.35
HM2211 Carb Needle Valve Seat, Start Side 6HP 21.35
HM222 Carb Needle Valve Seat, Fuel Side 1-1/2 to 2HP 22.70
HM223 Carb Needle Valve Seat, Fuel Side 3HP 24.60
HM2231 Carb Needle Valve Seat, Fuel Side 6HP 25.70
Valve seats include copper line
HM224 Carb Needle Valve Seat Clamp, 1-1/2 to 2HP 7.50
HM2241 Carb Needle Valve Seat Clamp, 3-6HP 7.50
HM2675 Crankhandle 1-1/2 to 2HP Complete 78.65
HM2672 Crankhandle (attaches to flywheel), 1-1/2 to 2HP Dishpan 34.65
HM268 Crankhandle Pawl Only 1 1/2-6HP 17.60
HM2685 Crankhandle Pawl Pin 1 1/2-6HP 3.05
HM159 Crankhandle Pawl Spring 6.00
HM225 Decal, All Engines 5.00ea
HM2255 Detent bracket, Battery model 95.00
HM226 Exhaust Rocker Arm 1-1/2 to 2HP 39.35
HM227 Exhaust Rocker Arm 3HP 51.45
HM228 Exhaust Rocker Arm 6HP 53.10
HM2282 Exhaust Rocker Arm Bracket 1-1/2HP 33.55
HM2285 Exhaust Rocker Pin W/Oil Cup 11/2-2HP 23.25
HM2286 Exhaust Rocker Pin W/Oil Cup 3-6HP 26.50
HM229 Exhaust Push Rod, Battery 1-1/2HP 17.35
HM2295 Exhaust Push Rod Lifter, Battery 1-1/2HP 39.35
HM2297 Exhaust Push Rod Lifter, Battery 3HP 41.00
HM230 Exhaust Push Rod 1-1/2HP 17.35
HM231 Exhaust Push Rod 3HP 20.35
HM232 Exhaust Push Rod 6HP 23.10
HM233 Exhaust Push Rod End 1-1/2 to 2HP 20.90
HM234 Exhaust Push Rod End 3-6HP 22.00
HM2348 Fuel Tank (Battery) 1-1/2HP 57.75
HM235 Fuel Tank (Steel Skids) 1-1/2 to 2HP 57.75
HM236 Fuel Tank (Bosch Mag.) 1-1/2 to 2HP 57.75
HM237 Fuel Tank 3-5HP 63.25
HM238 Fuel Tank 6-7 1/2HP 68.75
HM239 Gasket, Air Valve Plate 1-1/2 to 2HP 1.65
HM240 Gasket, Air Valve Plate 3-6HP 1.65
HM241 Gasket, Butterfly Housing To Head 1-1/2 to 2HP 1.65
HM242 Gasket, Carb To "B" Housing 1-1/2 to 2HP 1.65
HM243 Gasket, Carb To Head 3-6HP 1.65
HM244 Gasket, Cylinder Head 1-1/2 to 2HP 9.90
HM181 Gasket, Cylinder Head 3HP 9.90
HM2442 Gasket, Cylinder Head 5HP "B" (4-3/4" bore) 12.60
HMl82 Gasket, Cylinder Head 6HP 12.65
HM245 Gasket, Mag Coil Cover Model "J" or "X" 1.65
HM247 Gear, Cam, 1-1/2 to 2HP 164.20
HM2473 Gear, Cam, 3-6HP 203.50
HM2475 Gear, Crankshaft (Pinion) 1-1/2 to 2HP 88.00
HM2477 Gear, Crankshaft (Pinion) 3HP 94.05
HM2478 Gear, Crankshaft (Pinion) 6HP 94.05
HM248 Gear, Gov. With Threads 1-1/2 to 2HP 55.30
HM249 Gear, Gov. With Threads 3-6HP 58.30
HM250 Gear, Gov. & Shaft 1-1/2 to 2HP 88.00
HM251 Gear, Gov. & Shaft 3-6HP 94.35
HM252 Gear, Magneto 1-1/2 to 2HP 88.00
HM2521 Gear, Magneto 3-6HP 94.35
**All Steel Gears-Straight Teeth Only**
HM2525 Gov. Assy. 1-1/2 to 2HP (See Illust.) 192.00
HM2526 Gov. Assy. 3-6HP 209.00
HM2527A Gov. Speed Control Assy. (mounts on HM206), 1-1/2HP 91.85
HM2527B Gov. Speed Control Assy. (mounts on HM2061), 3-6HP 83.50
HM253 Gov. Speed Con. Leaf Spring 1 1/2-6HP 20.50
HM2531 Gov. Speed Con. Thumb Screw 1 1/2-6HP 17.35
HM254 Gov. Spindle Rod 1 1/2-6HP 20.35
HM2541 Gov. Spindle Adj. Screw 1 1/2-6HP 10.45

HM255 Gov. Throttle Rod, Carb 1-1/2 to 2HP, w/adjuster 23.70
HM256 Gov. Throttle Rod, Carb 3HP 24.50
HM257 Gov. Throttle Rod, Carb 6HP 25.60
HM2575 Gov. Thrust Washer 1-1/2 to 6HP 1.65
HM258 Gov. Weight 1 1/2-6HP- (See Illust.) 19.50
HM258A Gov. Weight W/Ball 1 1/2-6HP 19.50
HM258B Gov. Weight (with notch) 19.50
HM2581 Gov. Weight Pin 1 1/2-6HP 1.10
HM2626 Gov. Weight Drag Spring 1 1/2-6HP 15.00
HM2585 Governor Yoke 1 1/2-6HP 51.70
GRO5 Grease Cup 1-1/2 to 2HP, 1" Diam. 12.10
GRO7 Grease Cup-Main 1-1/2 to 2HP, Rod 3-6HP 16.50
GRO8 Grease Cup-Main 3-6HP, 1 1/2" Diam. 17.05
(Above cups have 1/4" PT, larger sizes avail.)

Bosch 'AB-33' Magneto parts
L012 AB-33 Instructions and Parts 2.20
HM2593 Hold down clamp (clamps mag to bracket) 26.40
HM2593A Hold down clamp stud 3.30
HM2591 Lead Out tower 38.50
HM25910 Magneto, Bosch AB-33, Inmductor Spring Roller 4.95
HM2592 Points cover 13.75
HM2593 Hold down clamp, Magneto, Bosch AB-33 26.40
HM2593A Hold down clamp stud, Magneto, Bosch AB-33 3.30
HM2594 Base plate, Magneto, FM 'J' 22.55
HM2595 Coil, Magneto, FM 'J' 74.80
HM2596 Coil & Points cover cap, Magneto, FM 'J' 41.25
HM2597 Condensor, Magneto, FM 'J' 11.85
HM2598 Points set, Magneto, FM 'J 24.75
HM2588 Trip Arm, 2 3/4", Magneto Bosch AB-33 44.55
HM2589 Trip Arm, 5 1/4"-1-1/2HP, Magneto Bosch AB-33 44.55
HM259 Trip Roller & Bolt 1-1/2 to 2HP, Magneto Bosch AB-33 22.55
HM2590 Trip Roller & Bolt 3-6HP, Magneto Bosch AB-33 28.05
HM261A Trip Lever Spring, Magneto Bosch AB-33 6.60
HM25910 Trip Lever Spring Roller, Magneto Bosch AB-33 4.95

F/M 'J' Magneto parts
HM2594 Base Plate, Magneto FM "J" 22.55
HM2595 Coil, Magneto FM "J" 74.80
HM2596 Coil & Points Cover Cap, Magneto FM "J" 41.25
HM2597 Condensor, Magneto FM "J" 11.85
HM2598 Points Set, Magneto FM "J" 24.75
HM260 Key, Drive gear (fits J, R, RV, X mags) 1.10

F/M 'R' Magneto parts
HM2599 Leadout Tower, FM "R" 46.20
HM260 Key, Drive gear (fits J, R, RV, X mags) 1.10

F/M 'RV' Magneto parts
HM2605 Coil Replacement, Magneto FM "RV" 79.20
HM2606 Coil Cover, Magneto FM "RV" 57.75
HM2607 Condensor Replacement, Magneto FM "RV" 17.60
HM2608 Points, Magneto FM "RV" 26.40
HM260 Key, Drive gear (fits J, R, RV, X mags) 1.10
HM261 Muffler 1-1/2 to 2HP 32.50
HM186 Muffler, 3HP 39.50
HM187 Muffler 6HP 45.00
Oilers and oiler glass - click here

HM2612 Piston Pin 1-1/2 to 2HP & 3HP (Style "C") 22.55
HM2613 Piston Pin 3HP 24.20
HM2614 Piston Pin 6HP 33.30
HMR23 Piston Ring, 3 1/2" X 1/4" 1-1/2 to 2HP 6.60ea
HMR43 Piston Ring, 4 1/2" X 5/16" 3HP 8.80ea
HMR52 Piston Ring, 5 3/4" X 3/8" 6HP 15.40ea
*Check your rings-later engines had narrower widths*
HMR21 Piston Ring, 3 1/2" X 1/8" 1-1/2 to 2HP 6.60ea
HMR415 Piston Ring, 4 1/2" X 5/32" 3HP 8.80ea
HMR515 Piston Ring, 5 3/4" X 3/16" 6HP 15.40ea
HM02 Spark plug, 1/2" NPT 5.50
HMl59 Spring, Crankhandle Pawl 1 1/2-6HP 6.00
HM261A Spring, Bosch AB-33 Trip Lever 1 1/2-6HP 6.60
HM2625 Spring, Governor Spindle Spr. 1 1/2-6HP 3.30
HM2626 Spring, Governor Weight Drag 1 1/2-6HP 15.00
HM263 Spring, Needle Valve 1-1/2 to 2HP 1.25
HM264 Spring, Needle Valve 3-6HP 2.00
HM265 Spring, Throttle Butterfly 1-1/2 to 2HP 5.45
HM266 Spring Throttle Butterfly 3-6HP 5.45
HM267 Spring, Intake Valve 1-1/2 to 2HP 5.25
HM189 Spring, Intake Valve 3-6HP 6.00
HM1892 Spring, Intake Valve Drag 3-6HP 15.95
HM188 Spring, Exhaust Valve 1 1/2-6HP 6.00
HM26855 Timer Assy., battery model only, 1-1/2 to 3HP
(Timer Assy. includes timer plate, cover, 4 thin shims, 1 thick, & insulators)
HM2686A Timer Plate, battery model only, 1-1/2 to 3HP 3.30
HM2686B Timer Cover, battery model only 1-1/2 to 3HP 27.50
HM2686C Timer Insulator Pack (Insulators and bushing) 15.50
HM2686D Timer Shim, battery model only, .018 thick 1.65
HM2686E Timer Shim, battery model only, .042 thick, 1-1/2 to 3HP 1.65
HM269 Valve, Exhaust 1-1/2 to 2HP 38.75
HM190 Valve, Exhaust 3HP 44.00
HM191 Valve, Exhaust 6HP 49.50
HM270 Valve, Intake 1-1/2 to 2HP 38.75
HM271 Valve, Intake 3HP 44.00
HM272 Valve, Intake 6HP 49.50
HM273 Valve Keeper, Exhaust 1-1/2 to 2HP 8.00
HM2731 Valve Keeper, Exhaust 3-6HP 8.00
HM274 Valve Keeper, Intake 1-1/2 to 2HP 8.00
HM2741 Valve Keeper, Intake 3-6HP 8.00
HM275 Valve Clips 3/8" 1-1/2HP 1.10
HM2751 Valve Clips 7/16" 3-6HP 1.10
(Usually requires 1 keeper & 1 clip per valve unless your valve has a hole instead of a groove. Please be specific when ordering valves.)