Subaru SP170 User Instructions
![Subaru SP170 Engine manual cover](/images/iRPuQntpyYlIyMTCAKnPsvXu/thumbs/thumb175x175.webp)
The recommended oil type for the Subaru SP170 engine is SAE 10W-30, which provides optimal performance across a wide range of temperatures.
You should change the oil in your Subaru SP170 engine every 25 hours of operation or at least once a season, whichever comes first.
Common causes for the Subaru SP170 engine not starting include a lack of fuel, a dirty air filter, a faulty spark plug, or a discharged battery.
To clean or replace the air filter, remove the filter cover, take out the air filter, and clean it with compressed air. If it is damaged or excessively dirty, replace it with a new one.
To store the Subaru SP170 engine, drain the fuel, change the oil, clean the air filter, and store in a dry, cool place. Ensure the engine is covered to prevent dust accumulation.
If your Subaru SP170 engine is overheating, check for clogs in the cooling fins, ensure proper oil levels, and verify that the air intake is not obstructed.
A rough running or misfiring Subaru SP170 engine may be due to a dirty spark plug, incorrect fuel mixture, or an obstructed air filter.
Regular maintenance for the Subaru SP170 engine includes changing the oil, inspecting and cleaning the air filter, checking the spark plug, and ensuring all bolts and screws are tightened.
To adjust the idle speed, locate the idle adjustment screw on the carburetor and turn it clockwise to increase or counterclockwise to decrease the idle speed.
Black smoke from the Subaru SP170 engine may indicate a rich fuel mixture, which can be caused by a clogged air filter or carburetor issues.