Jonsered 2045 Chainsaw Manual

The Jonsered 2045 is a professional-grade chainsaw designed for demanding forestry and arborist work. It features a powerful 45cc engine, advanced anti-vibration system, automatic chain oiling, quick-release air filter, and ergonomic design for extended use. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 45cc X-Torq engine, 16" or 18" guide bar, inertia-activated chain brake, side-mounted chain tensioner, quick-release air filter, and low-vibration handles.

Safety Information

Read all instructions before operation. Always wear proper PPE.

1. Personal Protective Equipment: Wear safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toe boots.
2. Work Area Safety: Clear area of bystanders, especially children. Maintain secure footing.
3. Kickback Prevention: Hold saw firmly with both hands. Avoid contact with bar tip.
4. Fuel Safety: Refuel in well-ventilated area with engine off and cool. Use proper fuel/oil mix.

WARNING! Chainsaw kickback can cause serious injury or death. Never operate with one hand.

Assembly & Preparation

Unpack and inspect all components. Assemble on clean, flat surface.

1. Attach guide bar: Loosen bar nuts, position bar over studs, align chain sprocket.
2. Install chain: Place chain over bar with cutting teeth facing forward. Ensure proper direction.
3. Tension chain: Adjust with side-mounted tensioner until chain snaps back when lifted.
4. Fuel mixture: Use 50:1 mix of unleaded gasoline (min 90 octane) and Jonsered 2-stroke oil.
5. Fill tanks: Add fuel mix to fuel tank and bar/chain oil to oil tank.

CAUTION! Ensure chain brake is disengaged before starting. Check all fasteners are tight.

Specifications

• Engine Displacement: 45 cc
• Power Output: 2.2 kW (3.0 hp)
• Max Power Speed: 9,000 rpm
• Idle Speed: 2,700 rpm
• Fuel Consumption: 510 g/kWh
• Chain Pitch: 3/8"
• Chain Gauge: 0.050" (1.3 mm)
• Drive Links: 56 (16" bar) or 64 (18" bar)
• Spark Plug: Champion RCJ7Y or equivalent
• Warranty: 2 years commercial use, 4 years private use

Controls and Components

Main controls: Throttle trigger, throttle lockout, stop switch, choke control, primer bulb, chain brake lever.

Right Side: Chain brake lever, throttle trigger, front handle. Left Side: Stop switch, choke control, primer bulb, rear handle with vibration dampeners. Top: Fuel cap, oil cap, air filter cover. Rear: Spark plug cover, starter handle.

Safety Features: Chain brake (manual/inertia), throttle lockout, right-hand guard, chain catcher. Adjustment Points: Chain tensioner (side), idle speed screw (carburetor), L/H mixture screws (requires special tool).

Starting & Operation

Cold Start Procedure:

1. Place saw on flat ground. Engage chain brake.
2. Press decompression valve (if equipped).
3. Set choke to full position. Press primer bulb 5-6 times.
4. Pull starter cord sharply until engine fires (1-3 pulls).
5. Move choke to half position. Pull until engine starts.
6. Blip throttle to disengage choke. Disengage chain brake.

Warm Start: Choke off. Pull starter cord. Cutting Techniques: Use full throttle when cutting. Let chain do the work. Avoid pushing or forcing. Maintain secure grip with thumbs wrapped around handles.

Maintenance Schedule

Daily (Before Use): Check chain tension, sharpness, and lubrication. Inspect air filter. Verify all fasteners tight.

Weekly: Clean air filter (replace if damaged). Check spark plug condition. Clean cooling fins. Inspect anti-vibration elements.

Monthly: Clean fuel filter. Check fuel lines for cracks. Clean carburetor air intake. Inspect chain brake function.

Seasonal: Replace spark plug. Clean muffler screen. Check clutch and drum wear. Replace bar/chain if worn.

Chain & Bar Care

Sharpening: Use round file matching chain pitch (5/32" for 3/8" pitch). Maintain 30° cutting angle. File all cutters evenly.

Depth Gauges: File rakers to 0.025" below cutter height using depth gauge tool.

Bar Maintenance: Clean bar groove weekly. Flip bar monthly for even wear. Lubricate sprocket tip.

Tip: Keep chain sharp - a dull chain causes excessive wear and dangerous operation.

Storage Guidelines

Long-term Storage (30+ days):

1. Drain fuel tank completely. Run engine until it stops.
2. Remove spark plug. Add 1 tsp of oil to cylinder. Pull starter 2-3 times. Reinstall plug.
3. Clean entire saw thoroughly. Remove chain, clean and soak in oil.
4. Store in dry place, covered, with bar and chain separately.

CAUTION! Never store with fuel in tank. Fuel deteriorates and can damage carburetor.

Warranty Information

Jonsered 2045 comes with 2-year commercial warranty or 4-year private user warranty from date of purchase. Warranty covers defects in materials and workmanship. Not covered: Normal wear, misuse, improper maintenance, unauthorized repairs. Keep purchase receipt for warranty validation. For warranty service, contact authorized Jonsered dealer. For support, visit www.jonsered.com or contact customer service at 1-800-267-0425.

Troubleshooting

Service: For repairs beyond basic maintenance, contact authorized Jonsered service center.

Support: 1-800-267-0425; www.jonsered.com