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Dolmar holds a legendary position in power tool history, having manufactured the first gasoline-powered chainsaw back in 1927. Engineered with German precision and later refined under Makita’s manufacturing standards, Dolmar saws earned an enduring reputation among arborists, foresters, and serious landowners for high power-to-weight ratios, rugged magnesium crankcases, and exceptional air filtration systems. Choosing the right Dolmar model requires balancing engine displacement, guide bar length, chain pitch, and intended workload, whether you are tidying up yard branches or dropping mature hardwoods in the timber lot.

Quick answer: The top 8 Dolmar chainsaw lineup spans from light landowner models to high-output logging saws: PS-32 C (32cc), PS-420 SC (42.4cc), PS-5105 (50cc), PS-6100 (61cc), PS-6400 (64cc), PS-7310 (72.6cc), PS-7910 (78.5cc), and the heavy-timber PS-9010 (90cc). Homeowners excel with the PS-420 SC or PS-5105, while professional fallers rely on the PS-7910 for demanding bucking and felling work.

Understanding Dolmar Engineering and Model Classifications

Navigating Dolmar's catalog involves understanding how the brand categorizes engine displacement and chassis builds. Dolmar designations use the "PS" prefix—standing for Power Saw—followed by numbers that correspond to the engine's approximate cubic centimeter displacement and design generation. Suffixes like "C" denote catalytic converter equipped models, while "SC" highlights stratified scavenging technology designed to boost fuel efficiency while drastically lowering exhaust emissions.

At the core of Dolmar’s design philosophy is an focus on engine acceleration and operational comfort. Professional-grade models incorporate heavy-duty cast magnesium crankcases, dual spike bumpers, lateral side chain tensioning, and spring-assisted anti-vibration dampening systems. These features decouple the engine vibrations from the front and rear handles, reducing operator fatigue during long shifts in the woods. Additionally, Dolmar’s "Touch & Stop" single-lever control simplifies cold and warm engine restarts while preventing flood hazards.

Chain selection across Dolmar models aligns closely with power output. Smaller homeowner models run a 3/8-inch Low Profile (LP) chain with a .050-inch gauge for smooth, low-kickback pruning. Mid-range 50cc and 60cc saws typically leverage .325-inch or standard 3/8-inch pitch chains with .050-inch or .058-inch drive links, maximizing cutting velocity. Large timber saws utilize full 3/8-inch standard or .404-inch heavy-duty pitch chains, designed to pull through dense oak, hickory, or pine without straining the clutch assembly.

Top 8 Dolmar Chainsaw Models Detailed Analysis

Selecting the best saw requires analyzing real engine output, bar capacity, and build characteristics. Below is an in-depth breakdown of the eight standout Dolmar models across compact, mid-range, and heavy-duty categories.

1. Dolmar PS-32 C (32.0 cc)

Designed for entry-level yard maintenance, light fire-wood cutting, and limb pruning, the PS-32 C packs a 32.0 cc engine generating 1.35 kW (1.8 hp). Weighing only 4.2 kg (9.3 lbs) dry, this saw is exceptionally nimble, allowing extended overhead work without shoulder strain. It features an automatic oil pump, a primer bulb, and Dolmar's "Memory Power Ignition" (MPI) system for quick restart attempts.

The PS-32 C handles 14-inch to 16-inch guide bars and runs on a 3/8-inch low profile chain (.050-inch gauge). Its tool-less air filter maintenance and side-access chain tensioner make it an approachable tool for DIY users step-testing gas equipment for the first time.

2. Dolmar PS-420 SC (42.4 cc)

Widely considered one of the best semi-professional mid-sized saws ever produced, the PS-420 SC bridges the gap between homeowner budget saws and pro-level timber equipment. Its 42.4 cc motor delivers 2.2 kW (3.0 hp) inside a magnesium crankcase—a rarity for saws in this displacement class, which often use plastic engine housings.

Equipped with a catalytic converter and stratified air scavenging engine design, the PS-420 SC operates cleanly while delivering torque through tough hardwood. It comfortably runs a 16-inch guide bar with a .325-inch pitch chain, making it the ultimate tool for cutting winter firewood supplies, clearing storm debris, and medium felling.

Pro tip: On new 50:1 2-stroke saws like the PS-420 SC, chain tensioning will drift during the first few tankfuls as the chain links stretch under thermal load. Always check drive link slop every time you refuel, ensuring the chain snaps back firmly against the bar underside without binding when rotated by hand in cut-resistant gloves.

3. Dolmar PS-5105 (50.0 cc)

The PS-5105 represents Dolmar’s flagship entry in the competitive 50cc professional class. Pushing out 2.8 kW (3.8 hp) from its 50.0 cc motor, this high-revving saw features an engine speed limit of around 13,800 RPM. It features an optimized cylinder transfer port design, high-velocity cooling airflow, and a heavy-duty air intake filter setup built for dusty logging environments.

Ideal for 16-inch to 20-inch guide bars, the PS-5105 utilizes standard .325-inch or 3/8-inch pitch chain systems. Its excellent power-to-weight ratio allows woodcutters to limb, buck, and drop trees up to 18 inches in diameter rapidly without breaking rhythm.

4. Dolmar PS-6100 (61.0 cc)

When tasks demand sustained cutting power for bucking heavy logs, the PS-6100 delivers reliable performance. Powered by a 61.0 cc engine outputting 3.4 kW (4.6 hp), it incorporates Dolmar's Longlife Filter System, which utilizes cyclonic pre-separation to eject heavy sawdust particles before they reach the primary filter element.

The PS-6100 balances cleanly with 18-inch and 20-inch guide bars running 3/8-inch pitch chain (.050 or .058 gauge). With a large 0.8-liter fuel tank, users experience extended runtimes between refills, making this model a true workhorse for land clearing and farm operations.

5. Dolmar PS-6400 (64.0 cc)

The PS-6400 shares the heavy-duty crankcase chassis family with its larger siblings, offering commercial durability at a lower entry price point. Producing 3.5 kW (4.7 hp) from its 64.0 cc powerhead, this model is built with cast steel components, full-wrap handle options, and adjustable oil pumps designed to supply thick bar oil to longer guide bars.

Accepting bar lengths from 20 inches up to 24 inches, the PS-6400 is popular among tree service technicians and municipal crews who need a reliable saw capable of pulling through dense trunks under continuous load.

6. Dolmar PS-7310 (72.6 cc)

Purpose-built for professional felling operations, the PS-7310 features a 72.6 cc engine delivering 4.2 kW (5.6 hp). Designed with severe timber falling in mind, this machine features heavy bucking spikes, an integrated decompression valve for effortless starter pull resistance, and a heavy-duty rubber vibration dampening system.

The PS-7310 pairs best with 20-inch to 28-inch guide bars running full 3/8-inch pitch chain. It cuts aggressively through thick hardwood trunks and stands up to daily commercial abuse in rugged forestry terrain.

7. Dolmar PS-7910 (78.5 cc)

The Modern Evolution of Dolmar: Makita Pro Chainsaws

Dolmar’s legendary German engineering lives on under the Makita banner. If you want Dolmar-grade build quality and precision cutting in a modern platform, explore Makita 36V (18V X2) and 40V max XGT brushless chainsaws, delivering gas-rivaling chain speed with zero fuel hassles. Check Makita chainsaws on Amazon.
The Modern Evolution of Dolmar: Makita Pro Chainsaws
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The PS-7910 is legendary in forestry circles for having one of the highest power-to-weight ratios in the high-displacement chainsaw category. Generating 4.3 kW (5.9 hp) out of a compact 78.5 cc powerhead weighing just 6.6 kg (14.5 lbs) dry, it delivers performance that regularly rivals 85cc class competitors.

Featuring a heavy-duty dual-piston ring layout, stratified air flow, and efficient muffler design, the PS-7910 handles guide bars from 20 inches up to 32 inches with ease. It is an industry standard for production felling, large bucking, and portable chainsaw milling attachments.

8. Dolmar PS-9010 (90.0 cc)

At the pinnacle of Dolmar’s heavy timber lineup sits the massive PS-9010. Engineered specifically for felling giant hardwoods, processing thick softwood logs, and driving heavy-duty chainsaw mills, its 90.0 cc motor puts out 4.9 kW (6.6 hp) with massive low-end torque.

Built to handle bar lengths from 24 inches up to 36 inches, the PS-9010 utilizes high-flow adjustable oiling mechanisms and can be equipped with .404-inch pitch chain for maximum durability against abrasive wood fibers and dirty bark.

Dolmar Model Specification Comparison

Comparing technical specs side-by-side simplifies matching engine output, weight, and bar recommendations to your specific land management needs.

Model Displacement Power Output Powerhead Weight Recommended Bar Length Chain Pitch
PS-32 C 32.0 cc 1.35 kW / 1.8 hp 4.2 kg (9.3 lbs) 14" – 16" 3/8" LP
PS-420 SC 42.4 cc 2.20 kW / 3.0 hp 4.9 kg (10.8 lbs) 14" – 16" .325" or 3/8" LP
PS-5105 50.0 cc 2.80 kW / 3.8 hp 5.4 kg (11.9 lbs) 16" – 20" .325" / 3/8"
PS-6100 61.0 cc 3.40 kW / 4.6 hp 6.0 kg (13.2 lbs) 18" – 20" 3/8"
PS-6400 64.0 cc 3.50 kW / 4.7 hp 6.3 kg (13.9 lbs) 20" – 24" 3/8"
PS-7310 72.6 cc 4.20 kW / 5.6 hp 6.6 kg (14.5 lbs) 20" – 28" 3/8"
PS-7910 78.5 cc 4.30 kW / 5.9 hp 6.6 kg (14.5 lbs) 20" – 32" 3/8"
PS-9010 90.0 cc 4.90 kW / 6.6 hp 8.2 kg (18.1 lbs) 24" – 36" 3/8" / .404"

Essential Maintenance Practices and Safety Protocols

Maintaining peak operational efficiency and longevity from your Dolmar chainsaw requires strict adherence to routine preventive care and basic fuel management. Gas-powered two-stroke engines require a precise 50:1 ratio of high-octane gasoline (minimum 89 octane, preferably ethanol-free) mixed with high-grade synthetic 2-stroke air-cooled engine oil. Stale fuel or ethanol blends above 10% can cause lean running conditions, dried carburetor diaphragms, and catastrophic piston scoring.

Every maintenance checklist should prioritize air filter cleaning, guide bar rail inspection, and chain sharpening. Clean the air filter with compressed air blowing from the inside out after every major work session. Turn your guide bar upside down periodically to promote even wear along both top and bottom rails, and use a rail dresser to remove wire burrs. Always keep saw chain cutters hand-filed at their specified 30-degree angles and top-plate clearance, maintaining depth gauges (rakers) at approximately .025 inches below cutter tips.

Safety is non-negotiable whenever starting a chainsaw. Operators must wear Personal Protective Equipment (PPE) compliant with federal standards, including chainsaw chaps featuring cut-retardant ballistic nylon layers, safety glasses, steel-toe boots, heavy leather gloves, and ear defenders paired with a hard hat. Always engage the chain brake before starting the engine on the ground, maintaining three points of solid contact.

Choosing the Right Model for Your Needs

For routine yard upkeep, pruning, and occasional light firewood duty, start with the Dolmar PS-420 SC paired with a 16-inch bar; its magnesium crankcase construction and smooth anti-vibration damping offer the best durability in the sub-50cc category. Landowners managing larger acreage or processing several cords of hardwood annually should select the PS-5105 or PS-6100 running an 18-inch bar with .325 or 3/8-inch pitch chain for an ideal balance of cutting speed and ergonomics. Professional loggers and tree care contractors dropping mature timber will maximize productivity by stepping up to the lightweight powerhouse PS-7910 fitted with a 24-inch or 28-inch guide bar.

Frequently Asked Questions

Are Dolmar and Makita chainsaws the same machinery?

Yes. Makita acquired Dolmar in 1991 and gradually integrated Dolmar's engineering and manufacturing facilities in Hamburg, Germany. Many classic teal Makita gas chainsaws are identical in internal construction, parts, and specs to their orange Dolmar counterparts, differing primarily in body plastic colors and model numbering badges.

What is the correct fuel oil mix ratio for Dolmar chainsaws?

Dolmar 2-stroke chainsaws require a strict 50:1 gas-to-oil mix ratio using 89-octane or higher fresh unleaded gasoline combined with high-quality ISO-L-EGD or JASO FD rated 2-stroke air-cooled engine oil. Avoid fuel containing higher than 10% ethanol (E10) to prevent fuel system degradation.

Can I install a longer guide bar on my Dolmar saw than recommended?

Exceeding recommended guide bar lengths strains the centrifugal clutch, bogs down engine RPMs, and overtaxes the automatic oil pump, preventing adequate chain lubrication. Always stick within the manufacturer's specified bar length window listed for your model's displacement.

How do I start a flooded Dolmar chainsaw?

To clear a flooded Dolmar saw, push the choke lever fully down or to the "Off" position (disengaging choke while holding wide-open throttle), pull the starter cord several times with the chain brake set until the engine fires and clears the excess fuel, then set the lever back to normal run position once idling.

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