Chainsaw
Stihl MS 500i
2-Stroke
The Stihl MS 500i is a 79.2cc <!-- verify: stihlusa.com --> 2-stroke professional chainsaw and the first production chainsaw from any manufacturer with direct electronic fuel injection — there is no carburetor to rebuild. The maintenance profile shifts accordingly: fuel filter cleanliness is critical (injectors are contamination-sensitive), but carburetor diaphragm and needle/seat replacement are eliminated entirely. The MS 500i accepts 20" to 32" guide bars and delivers consistent power delivery in any orientation and across altitude changes. Aimed at professional loggers who want peak performance without altitude-related richening.
Spark Plug
OEM0000 400 7011(0.7mm gap)10mm thread — do not substitute BPMR7A (14mm thread)
| Brand | Part # | |
|---|---|---|
| NGK | CMR6H | Buy on Amazon → |
| Champion | RZ7C | Buy on Amazon → |
Air Filter
OEM1144 140 4402HD2 filter; also fits MS 651, MS 661 C-M
| Brand | Part # |
|---|
Fuel Filter
OEM0000 350 3518Orange in-tank pickup body fuel filter
| Brand | Part # |
|---|
Recoil Starter
OEM1144 080 2100
| Brand | Part # |
|---|
Chain
OEM(25", 3/8" pitch, .050" gauge, 84 drive links)Stock bar length; verify drive link count matches your bar
| Brand | Part # | |
|---|---|---|
| Oregon | 72EXL084G | Buy on Amazon → |
Guide Bar
OEM(25", 3/8" pitch, .050" gauge)
| Brand | Part # | |
|---|---|---|
| Oregon | 250VXLHD025 | Buy on Amazon → |