Stihl MS 280 User Manual

Online version - not for reprint
14 MS 270, MS 280
Condition Cause Remedy
Engine speed drops quickly under
load – low power
Air filter dirty Clean the air filter
Tank vent faulty Replace tank vent
Leak in fuel line between tank
and fuel pump
Seal connections or install a new
fuel line
Pump diaphragm damaged or
fatigued
Fit a new pump diaphragm
Main jet bores or ports blocked Clean the bores and ports
Fuel pickup body dirty Clean the pickup body, fit a new
filter
Fuel strainers dirty Clean the fuel strainers
Spark arresting screen dirty Clean or replace spark arresting
screen
Setting of high speed screw (H)
too rich
Reset high speed screw (H)
correctly
Throttle shutter not opened fully Check linkage
Engine will not idle,
idle speed too high
Throttle shutter opened too wide
by idle speed screw (LA)
Reset idle speed screw (LA)
correctly
Engine leaking Seal the engine

Stihl MS 280 Specifications

General

Sound Pressure Level	101 dB(A)
Sound Power Level	113 dB(A)
Oil Capacity	0.20 l (6.8 oz)
Guide Bar Length	16 in
Chain Pitch	3/8"