Engine Model
| Documents and Manuals | |
|---|---|
Air Cleaner Parts |
Alernator Flywheel |
| Carburetors |
Clutch Assemblies |
| Fuel Pumps |
Fuel Tank Parts |
| Governors |
Ignition Parts |
| Manifolds |
Miscellanious Parts |
| Muffler Parts |
Recoil, Screen, Conversion Kit Parts |
| Reduction Clutch Parts |
Repair Specifications (all) |
| Special Tools |
Starting Motor Parts |
| Repair Specifications | |
| Standard Cyclinder Bore | 3.750 +- .0005 |
| Piston Skirt to Bore Clearance | .0025 - .0035 Cam Ground |
| Crankpin Diameter | 2.099 - 2.100 |
| Connecting Rod to Crankpin Clearance | .0011 - .0036 Shell Bearing to Crankpin Clearance (Vertical) |
| Valve Tappet Clearance - Cold/Inlet | .007 |
| Valve Tappet Clearance - Cold/Exhaust | .020 |
| Bolt Torque Specifications(FT. LBS.) | |
| Connecting Rod | 32 - 36 |
| Cylinder Block/Center Main to C.Case | Cyl. Block Nut 45 - 50 |
| Capscrew 28 - 32 | |
| Cylinder Head | Studs 32 - 36 |
| Capscrews 45 - 47 | |
| Engine Base | 12 - 14 |
| Gear Cover | 16 - 18 |
| Manifold | 16 - 18 |
| Main Bearing Plate | 28 - 32 |
| Spark Plug | 20 - 22 |
| Flywheel | 112 - 118 |
| Rope Sheave | None |
| Additional Specifications(FT. LBS.) | |
| Crankcase Old Capacity | 3-1/2 QTS |
| OIL FILTER 1/2 QT (Additional oil when replacing filter) | |
| Running Spark Advance | 6 Degrees BTDC at 1800 rpm |
| 20 degrees BTDC at 3400 rpm | |
| Maximum Engine Operating R.P.M. | 3600 |
| Emission Certified | False |
| Maintenance Specs | |
| 1. Every 4 to 8 hours check air cleaner and clean or replace. | |
| 2. Every 8 hours check crankcase oil level. | |
| 3. Every 50 drain crankcase and refill with fresh oil. | |
| 4. For gasoline engines use only regular grade gasoline(87 Octane Min.) | |
| Crankcase, Crankshaft and Main Bearing Common Specs | |
| 1. Cylinders Worn .005" or more over Standard Size, Rebore, Hone and Fit with Oversize Piston and Rings. | |
| 2. Crankshaft End Play: .002 to .005" (Cold), (W2-1230, W2-1235, W2-1250, .005 to .012) | |
| 3. W2-1230, W2-1235 & W2-1250 Main Bearing Clearance: .002 to .005"-Connecting Rod Side Clearnance .009 - .018" - Piston Ring End Gap .010 to .020. | |
| 4. W4-1770 3rd Bearing Housing to Crankcase Torque 40-45 Foot Pounds. | |
| Piston Common Specs | |
| 1. Piston Pin to Piston: .0000 to .0008" Tight(W2-1230, W2-1235 & W2-1250 = .0005 TO .0008 Loose) | |
| 2. Piston Pin to Connecting Rod: .0005 to .001" (ACN, BKN, S7D, H8D, TR10D, TRA12D = .0002 TO .0008)(W2-1230, W2-1235 & W2-1250 = .0006 TO .0015 Tight) | |
| Ignition Common Specs | |
| 1. Spark Advance Check for Distributor/Ignition Timers: Engine must be running at 2000 RPM or above. | |
| 2. Breaker Point Gap: Distributor = .020", Magneto = .015". | |
| 3. Timing for Models S7D, HS7D, S8D, S10D, S12D, S14D, TR10D AND TRA10D is set by adjusting breaker point gap, preferrably with a continuity light or ohmmeter. For correct procedure see "TIMING" section in repair manuals | |
| 4. Breakerless Ignition (not adjustable): standard on TRA12D, optional on S10D, S12D & S14D. | |
| 5. Spark Plug Gap = .030". | |
| Valves Common Specs | |
| 1. Valve Face and Valve Seat Angle: 45 Degrees | |
| 2. Valve stem to guide clearance: .003 to .005" for all models except: ACN-BKN, V460D, V461D, V465D, VR4D=.002 TO .004". Exhaust only - S7D, HS7D, S8D, HS8D, TR10D, TRA10D, TRA12D = .002 TO .004" (W2-1230 = .003 to .005") Inlet Only - S7D, HS7D, S8D, HS8D, S10D, S12D, S14D, TR10D, TRA10D, TRA12D, W2-1230 = .001 to .003" | |
| 3. When Clearance Becomes .002" Over Hight limit, Replace guides. | |