Arctic Cat Tigershark 1998 PWC Service & Repair Manual – TS 640 / TS 770 / TS 1000

Arctic Cat’s March 1998 Tigershark service manual covers the TS 640, TS 770, and TS 1000 families, including the documented L/R variants. R-model naming: The cover lists TS 700 R, while the internal specifications and service sections use TS 770 R.

Searchable Service Text and Wiring Diagram Detail

Search and diagram access: OCR text search is available in the service text, with section and procedure bookmarks. Small diagram labels are not consistently searchable; wiring labels require zooming, and some remain faint.

Supplied as one printable 289-page PDF, including the cover, foreword, and table of contents—three front-matter pages already included in the total.

Engine, Fuel System and Jet Pump Repair

The following highlights are a selection of the contents. Other topics include gas-tank vent check-valve testing and filler-neck replacement.

• Engine repair: Step-by-step removal, disassembly, inspection, measurement, reassembly, and installation procedures for twin- and triple-cylinder engines, plus crankcase pressure testing.

• Carburetor service: Single-, twin-, and triple-carburetor overhaul procedures, accelerator-pump service, mixture adjustments, and throttle- and choke-valve synchronization.

• Fuel and lubrication: Fuel-pump testing, fuel-system and oil-reservoir pressure tests, oil-injection pump service, bleeding, and synchronization.

• Jet pump and driveline: Bearing and driveshaft service, impeller inspection, wear-ring clearance checks, engine/pump alignment, and inlet-grate and ride-plate replacement.

• Electrical diagnosis: CDI ignition checks, stator and trigger-coil tests, charging-system diagnosis, starter-motor overhaul, gauge testing, and model-specific wiring diagrams.

• Steering and hull: Steering-post and cable removal, inspection and alignment, trim-system service, reverse-deflector work, and seat, grab-handle and rub-rail maintenance.

• Storage and troubleshooting: Model-specific winterization, preparation after storage, submerged-watercraft servicing, and symptom-based charts for engine, starting, propulsion, and handling problems.

Written for service personnel, this manual can also be used as a textbook for service training.

Engine Inspection and Reassembly

The manual outlines engine disassembly, component cleaning, and critical measuring procedures for pistons, cylinders, and crankshafts. Reed-block inspection and crankcase pressure testing extend the diagnosis beyond visible top-end wear.

Engine Torque Patterns accompany the assembly instructions. Water Flow Routing drawings distinguish cooling paths through the engine, exhaust, and jet-pump/bilge circuits, providing references for investigating overheating and cooling restrictions.

Carburetor Configurations and Oil-Injection Checks

Configuration differences: TS 640 and TS 640 L use a single carburetor, as does TS 770. TS 770 L and TS 770 R have twin carburetors; TS 1000 L and TS 1000 R have three.

The Fuel Flow Chart and Pop-Off Pressure Chart relate throttle response to the carburetor circuits, needle-valve sizes, and arm-spring combinations. On the triple-carburetor engines, MAG, CENTER, and PTO components have cylinder-specific jetting; mixing them can cause piston damage.

Measured oil-pump output checks and separate injection check-valve tests provide a basis for investigating lubrication-related engine failures before reassembly.

Fuel-system work involves fuel-vapor and ignition hazards; the manual includes ventilation precautions and leak-testing requirements.

Pump Alignment and Driveshaft Sealing

The alignment procedure specifies the Engine-to-Molded Inlet Alignment Tool (P/N 0744-019) and Motor Alignment Sleeve (P/N 0643-063). Its Alignment Tool Length Settings Chart provides the model-specific settings used when checking engine position and mounting shims.

The jet-pump section warns that driveshaft threads can damage the floating-bearing housing seal during installation. Damage to this seal can let water enter the hull.

Electrical Tests and Fixed Ignition Timing

The resistance tables give component-specific readings and test-lead connections for the stator, trigger coil, ignition coils, and load relay. These references support checking suspected electrical faults before selecting replacement parts.

The ignition-timing procedure verifies fixed timing and relates an incorrect reading to possible flywheel-key or CDI faults. Separate Wiring Diagrams identify the circuits for each of the seven internally listed models.

Trim Systems and Hull-Service Limits

L-model manual-trim and reverse-deflector procedures are separate from R-model electric-trim tests. The trim motor is treated as a non-serviceable unit requiring complete replacement when defective.

Hull/body coverage identifies fiberglass and gel-coat materials and refers fiberglass repair work to the repair-kit instructions.

A Preview of Compression, Crankshaft and Reed Specifications

The engine tables list a 7.6:1 compression ratio for the 640 cc engine and 6.8:1 for the 1000 cc engine, alongside variant-specific piston and cylinder clearances.

Maximum crankshaft runout is 0.05 mm (0.002 in.), measured as total indicator reading, across the three engine families. The tables also list a 10.2 mm reed stopper height for each family.