MAINTENANCE SCHEDULE

General

Engine assembly, screws and nuts

Visual inspection for damage and tightness.

 

 

Check for general condition and security.

 

 

 

After each refueling

Control lever

Functional check

 

I-O switch

Functional check

 

 

 

Daily

Air filter

To be cleaned

 

Cooling air duct

To be cleaned

 

Cutting tool

Check for damage and sharpness

 

Idling speed

Inspect (Cutting tool does not rotate)

 

 

 

Weekly

Spark plug

Inspection, replace if necessary

 

Muffler

Check and clean the opening if necessary

 

 

 

Quarterly

Suction head

To be replace

 

Fuel tank

To be cleaned

 

 

 

Yearly

Fuel tank

Empty fuel tank

(Long Term)

Carburetor

Operate until engine stops

 

 

 

TROUBLESHOOTING CHART

Trouble

System

Observation

Cause

 

 

 

 

Engine does not start or

Ignition system

Ignition spark O.K.

Failure in fuel supply or compression system, mechanical defect

hard to start

 

 

 

 

No ignition spark

I-O switch operated, wiring fault or short circuit, spark plug or

 

 

 

 

 

connector defective, ignition module faulty

 

 

 

 

 

Fuel supply

Fuel tank filled

Wrong choke position, defective carburetor, fuel supply line bent

 

 

 

or blocked, dirty fuel

 

 

 

 

 

Compression

No compression when pulled over

Cylinder bottom gasket defective, Crankshaft seals damaged,

 

 

 

Cylinder or piston rings defective or improper sealing of spark

 

 

 

plug

 

 

 

 

 

Mechanical fault

Starter not engaging

Broken starter spring, broken parts inside the engine

 

 

 

 

Warm start problem

 

Tank filled

Carburetor contaminated or damaged. Clean or replace.

 

 

Ignition spark

 

 

 

 

 

Engine starts but soon

Fuel supply

Tank filled

Incorrect idle-adjustment,

stops

 

 

Carburetor contaminated

 

 

 

Defective tank, fuel supply line interrupted, cable or I-O switch

 

 

 

defective.

 

 

 

 

Insufficient performance

Several systems

Poor engine idling

Air filter contaminated, carburetor contaminated, muffler

 

 

 

clogged, exhaust duct in the cylinder clogged

 

 

 

 

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Dolmar MS-231 C, MS-261 C, MS-261 U, MS-331 U, MS-331 C instruction manual Maintenance Schedule, Troubleshooting Chart

MS-231 C, MS-261 C, MS-331 U, MS-331 C, MS-261 U specifications

The Dolmar range of chainsaws, including the MS-261 U, MS-331 C, MS-331 U, MS-261 C, and MS-231 C, represents innovation and performance in outdoor power equipment. These models are engineered for both professional and recreational use, catering to various cutting needs.

The MS-261 U stands out with its lightweight design and powerful engine, offering a balance between efficiency and portability. It features a 50.2 cc engine that delivers robust power for various tasks, from tree trimming to felling. The AutoReturn choke system simplifies starting, while its anti-vibration technology ensures operator comfort during extended use.

The MS-331 C takes performance further with its larger 59 cc engine, designed for demanding applications. One of its key features is the M-Tronic technology, which automatically adjusts the fuel mixture for optimal performance in different conditions, ensuring consistent power and efficiency. Additionally, the saw is equipped with a system that allows for quick chain tensioning, reducing downtime and increasing productivity.

The MS-331 U combines the power of the MS-331 C with an ergonomic design suited for professional forestry work. This model is particularly designed for heavy-duty applications, featuring a larger fuel tank for extended running time. Its advanced vibration dampening system significantly reduces operator fatigue, making it ideal for long workdays.

In contrast, the MS-261 C is more compact and lightweight, making it a preferred choice for those who need versatility and maneuverability. This model integrates a Catalytic Converter, which not only enhances performance but also reduces emissions, making it an environmentally-friendly option. The inclusion of a premium air filter extends the intervals between maintenance, enhancing overall user experience.

Lastly, the MS-231 C is tailored for homeowners and light commercial use. Its efficient 45.6 cc engine is powerful yet easy to handle, making it perfect for casual users and those new to chainsaw operation. The Quick Stop chain brake and low vibration technology are standard features, promoting safety and comfort.

Overall, the Dolmar MS series combines innovative technologies and user-friendly features that cater to a wide audience, providing reliable solutions for cutting tasks ranging from casual yard work to professional logging operations. Each model emphasizes power, efficiency, and comfort, ensuring a productive experience for every operator.