1985 Bombardier Ski-Doo Formula, Safari, Skandic, Elan, Citation, Tundra, Alpine, and Mirage III Snowmobile Shop Manual (P/N 484 0503 00)

This English-language 1985 Bombardier Ski-Doo Shop Manual, P/N 484 0503 00, covers Formula SS, SP, MX and Plus; Safari 377, 377E, 447 and Grand Luxe LC; Skandic 377 and 377R; Elan; Citation LS and LSE; Tundra and Tundra LT; Alpine 503; and Mirage III.

Text search, navigation and wiring detail: PDF text search and embedded bookmarks are unavailable. The printed contents and section/page references support navigation. Wiring charts are sideways, and small wire codes and connector labels require rotation and zoom.

• Engine overhaul: Removal, disassembly, inspection and reassembly procedures cover pistons, cylinders, crankshafts, rotary valves, cooling systems and oil injection.

• Carburetion and starting: Mikuni identification, adjustment data and synchronization procedures accompany fuel pump testing, air silencer service and rewind starter repair.

• Clutch and drivetrain: Drive and driven pulley servicing, belt diagnosis, brake adjustment, chaincase repair and gearbox overhaul follow the applicable model configurations.

• Electrical diagnosis: Ignition timing, spark plug analysis, coil testing, battery checks and electric starter troubleshooting accompany model-specific electric charts.

• Suspension and steering: Bogie, slide, TRS 6 and PRS procedures, SP shock service, track alignment and axle work accompany steering and ski adjustments.

• Chassis and specifications: Hood and frame repair, paint codes and routing instructions are supported by special-tool listings, torque specifications and technical data tables.

Written for snowmobile mechanics already familiar with Bombardier service procedures, this manual assumes workshop experience and access to the proper hand and special tools.

Engine Repair, Measurement and Fuel Systems

The engine chapters distinguish types 247, 253, 377, 447, 462, 467, 503, 532 and 537, with dimensional wear-limit tables for inspection before reassembly. Crankshaft end-play measurement and shimming, rotary-valve timing diagrams and oil-pump synchronization procedures identify the applicable engine configurations.

Formula MX and Plus carburetors have different MAG- and PTO-side jetting; the identification data helps keep carburetors matched to the correct cylinder during repair. Cooling-system repair instructions also identify water-pump seal orientation, because incorrect installation can expose the seal spring to coolant and cause corrosion and severe damage.

Pulley Repair, Chaincases and Gearboxes

Drive-belt wear charts relate visible damage to possible causes, while pulley-alignment views identify measuring locations for each configuration. Drive-pulley repair includes Duralon bushing handling and governor-cup seating; an incorrectly seated shaft can bend the crankshaft.

Gearbox coverage separates the Alpine three-speed unit from the Skandic 377R planetary transmission. Serial-number notes identify inch-thread chaincase fasteners on specific Safari 377, Formula SP and Mirage III vehicles, helping avoid a metric fastener substitution.

Ignition Testing and Electrical Repair

Model-specific electric charts trace ignition, lighting and starting circuits with connector references and wire-color codes. Nippondenso CDI diagnosis charts separate generator-coil, control-unit and diode tests, while starter repair includes armature, commutator and brush inspections.

Breaker-point ignition on the 247 engine and electronic ignition on the other covered engine types have separate timing procedures. The tool listings identify the Nippondenso electronic ignition tester, P/N 419 008 400, for the covered electronic ignition systems.

Suspension, Steering and Chassis Repair

TRS 6 and PRS procedures cover idlers, bushings, shocks and spring adjustments; Formula MX and Plus also have front-suspension alignment and camber instructions. The SP material includes shock inspection, spring replacement and ride adjustment.

Chassis repair extends to repairable fiberglass and R.I.M. urethane panels, with original paint codes, while routing instructions address fuel lines, wiring harnesses and control cables. The manual directs parts ordering to the separate parts catalog and excludes dealer modifications made after manufacture.

Follow the manual’s safety instructions and use the specified tools, especially around rotating pulleys and tracks.

English PDF and Included Pages

The file omits printed page 02-02-1 from the 253 engine chapter and pages 05-04-2 through 05-04-5 from the SP suspension chapter. There are 500 pages in one printable English PDF, including 31 blank pages, three repeated content pages, three cover/title pages and three pages of original warranty information; these pages are already included in the total.