YARDMAX RV 170-S User Manual (English)

Questions and Answers:

K
Kelly HallAug 3, 2025
What to do if my YARDMAX Engine stops suddenly when running?
- C
  Cory GuerraAug 4, 2025
  If your YARDMAX Engine stops suddenly while running, it could be due to the following fuel supply issues: the fuel may be finished, the fuel line could be blocked, or there might be an issue with the float chamber. In such cases, refill the fuel, check and clear the fuel line, repair any damages, or dismantle the float chamber to eliminate any blockages. Alternatively, ignition system problems could be the cause. Try replacing the spark plug or the ignition coil, or insulate any exposed wires.
V
Veronica DavisAug 8, 2025
Why is my YARDMAX Gasoline Engine overheating?
- D
  Douglas FergusonAug 8, 2025
  If your YARDMAX Gasoline Engine is overheating, it could be due to insufficient oil or an incorrect oil ratio in the gasoline. To resolve this, repair the engine oil system, clean the exhaust pipe, repair any damaged parts, replace the connection rod or worn parts, readjust the engine governor, or replace the main bearing.
S
Scott KingAug 13, 2025
Why does my YARDMAX RV 170-S Engine make a knocking sound?
- G
  gabrielleblackAug 13, 2025
  If your YARDMAX Engine experiences knocking sounds, it could be due to excessive wear on the piston, cylinder, or piston ring. To address this, replace the worn parts, piston, piston pin, tie rod, or roller bearing.
A
Amber KentAug 18, 2025
What to do if increasing throttle makes my YARDMAX Engine speed decrease?
- D
  Dawn ReedAug 18, 2025
  If your YARDMAX Engine's throttle increase results in slow speed or the engine stops, this could be due to issues in the fuel supply system, such as exhaust air or a blocked fuel line. Dredge the fuel line, readjust, clean to get through, replace damaged parts, clear away any obstructions, or repair/replace faulty components. Alternatively, poor compression may be the cause. Replace worn parts, the cylinder gasket, readjust components, or repair as needed.
R
Robert BoltonAug 23, 2025
What causes abnormal combustion in a YARDMAX RV 170-S?
- F
  Frances KleinAug 23, 2025
  Abnormal combustion in your YARDMAX Engine can be attributed to the engine running too hot. Address this by troubleshooting the engine, clearing away any obstructions, and replacing the existing fuel with qualified gasoline.
J
John FitzgeraldAug 28, 2025
What causes abnormal cylinder compression in YARDMAX Engine?
- W
  William SmithAug 28, 2025
  Abnormal cylinder compression in your YARDMAX Engine may be due to a high-tension coil run out in a normal ignition system. This can be caused by a worn piston ring (at or over its wear limit), a broken piston ring, a sticking piston ring, a spark plug that is not tightened or lacks a gasket, air leakage between the cylinder block and head, or air leakage in the valves.