| Download | - View final version: Chain saw performance evaluation (PDF, 4.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/40003888 |
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| Author | Search for: Kim, P. Y.1; Search for: Messenger, G. S.1; Search for: Mulligan, M. F.1; Search for: Murphy, J. M.1 |
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| Affiliation | - National Research Council Canada. Division of Mechanical Engineering
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| Format | Text, Technical Report |
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| Physical description | 22 p. |
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| Abstract | All four saws evaluated had good fore and aft balance but were poor side to side when held by the front handle. Idle was good in all positions and on returning to an upright position.
All saws had good owner's manuals showing specific saw information and safety instructions. These manuals could be improved by illustrating a safe starting position and by adding the file size required for the chain. Parts lists were good in that specific screw sizes and lengths were called out rather than just a code number.
The four saws were found hard to start, ran out of oil before fuel mix, had poor safety features and had high sound and vibration (subjective) levels. Two of the saws showed shock mount bond failures on less than 3 tanks of fuel.
Two saws with carburetor modifications were easier to hot start but still required an excessive number of pulls for the casual user. The two earlier model saws were almost impossible to start when hot. Fuel did not boil in the tanks but it is suspected that it did in the carburetors. The new oil metering valves did not extend the chain oil supply beyond the fuel mix when hot.
The rear handle safety trigger was difficult to depress with a normal grip on all four saws. Also, the chain brake handle did not extend far enough to the left in front of the operator's left hand. When actuated, motion was lost in twisting the handle about the vertical axis before it moved ahead.
Hot torque on cylinder and crankcase screws on all saws was found to be much less than 100 lb. in.
Air filter s on all saws were inadequate. Saw dust was found inside all crankcases on tear-down. |
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| Publication date | 1978-08 |
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| Publisher | National Research Council Canada |
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| Series | |
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| Language | English |
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| Peer reviewed | No |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 420fb845-82c8-4369-9f56-d8f39ec11c68 |
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| Record created | 2025-11-25 |
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| Record modified | 2025-11-25 |
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