Briggs & Stratton — Assemble Timing Gear Case and Gears
Repair & overhaul · Timing gears and gear case
From a Briggs & Stratton service manual — check it applies to your exact model before use.
Browse Briggs & Stratton generators & specs →
Procedure
- Clean and lubricate oil pump rotor with engine oil and install in cylinder block; ID mark on rotor must face cylinder block.
- Install timing gear case with new gasket and camshaft retainer; torque screws to 8.0 Nm (70 in. lbs.).
- Lubricate and install camshaft, then install camshaft retainer; M6 x 18 mm screws, torque to 8.0 Nm.
- Make sure crankshaft key is at 12 o'clock position.
- Assemble idler gear with arrow up; align timing mark 11 (AA) with mark 1 (A) on crankshaft gear and mark 22 (BB) with mark 2 (B) on camshaft gear.
- Install oil pump gear.
- Torque camshaft gear 41.0 Nm, idler gear 25.0 Nm, oil pump gear 19.0 Nm.
- Install timing gear cover with new gasket; torque screws and nuts to 8.0 Nm (70 in. lbs.).
- Install crankshaft pulley with timing mark at 12 o'clock (#1 cylinder); torque screw to 88.0 Nm (65 ft. lbs.).
- Remove flywheel holder and install trigger assembly and wire.
- Install oil pick-up tube and strainer with new gasket; torque to 8.0 Nm.
- Install oil pan with new gasket; torque screws and nuts to 8.0 Nm (70 in. lbs.).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Screw sizes: M6 x 65 mm: 2; M6 x 55 mm: 3; M6 x 30 mm: 7; M6 nuts: 2
- Timing marks identified by letters (A, AA, B, BB) on engines after date code 990111007
Source: Briggs & Stratton service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.