STIHL MS 170 Not Working
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
91%
CONF
|
Oil Pump Assembly
The internal reciprocating piston within the pump housing can seize or become bypass-clogged when fine sawdust enters the oil reservoir. This part is non-serviceable; replacement is required to restore the vacuum necessary to draw oil from the tank and deliver it to the guide bar port.
SKU: 1130 640 3200
|
VIEW ON AMAZON
#CommissionsEarned
|
|
5%
CONF
|
Worm Gear (Drive Gear)
The MS 170 uses a plastic worm gear that engages with the metal crankshaft. If the oil pump experiences resistance or the oil viscosity is too high for ambient temperatures, the plastic teeth strip, resulting in a total loss of mechanical drive to the pump piston.
SKU: 1123 640 7102
|
VIEW ON AMAZON
#CommissionsEarned
|
|
4%
CONF
|
Oil Suction Hose
Air leaks at the interface where the suction hose meets the oil pump housing will cause the pump to lose prime. Over time, the rubber degrades or shrinks, allowing the pump to draw air instead of viscous bar oil, resulting in the 'bubbles but no flow' symptom reported by users.
SKU: 1130 358 7701
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the Oil Pump Assembly.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.