Stihl Re115k Manual (2025)

Before operating the unit, it is vital to review the safety guidelines detailed in the STIHL owner's manuals .

Regular upkeep is critical to prevent pump damage and ensure consistent pressure.

; it is a cold-water model and high temperatures can damage the pump seals. stihl re115k manual

| Problem | Likely Cause (from manual) | Solution | | :--- | :--- | :--- | | | 1. GFCI tripped. 2. Unplugged cord. 3. Motor overheated. | 1. Reset GFCI. Test outlet. 2. Check plug. 3. Allow to cool for 15 min. | | Motor runs, but no pressure | 1. No water supply. 2. Clogged inlet filter. 3. Nozzle is blocked. | 1. Turn on water. Purge air. 2. Clean sieve (see Chapter 5). 3. Use a paperclip to clean the nozzle orifice. | | Pressure fluctuates (pulsing) | 1. Air in inlet hose. 2. Water supply is weak. 3. Worn pump seals. | 1. Run trigger until steady. 2. Check garden hose kinks. 3. Contact Stihl dealer (pump service). | | Detergent not feeding | 1. Vario nozzle at high pressure. 2. Clogged detergent filter. 3. Tube is cracked. | 1. Twist to low pressure/detergent setting. 2. Clean the filter on the end of the suction tube. 3. Replace tube. | | Motor stops under load | 1. Extension cord too long or too thin. 2. Low voltage. | 1. Use 12 AWG cord max 50 ft. 2. Plug directly into wall outlet. |

: If you are using the internal suction feature, ensure your detergent is "pressure washer safe." Thick soaps can clog the internal valves. Before operating the unit, it is vital to

Typically equipped with an 8-meter textile-braided or steel-braided high-pressure hose. L&S Engineers Essential Maintenance Guide

| Interval | Action | Section in Manual | | :--- | :--- | :--- | | | Check high-pressure hose for cuts/kinks. Clean nozzle with cleaning needle. | 15.1 | | Weekly / 20 hours | Unscrew inlet filter (brown), rinse under tap water. | 15.2 | | Monthly | Check oil level (Sight glass on side of pump). Top up with STIHL special oil (Part # 0781 120 1002). | 15.3 | | Annually / 100 hrs | Complete oil change (Volume: 0.25 L). | 15.3 | | As needed | Clean the water strainer inside the inlet connector. | 15.2 | | Problem | Likely Cause (from manual) |

point the spray at people or pets; the pressure is high enough to cause "injection injuries" which are serious medical emergencies.

Before operating, the manual stresses familiarity with every component. Here is the parts diagram summary from the Stihl RE115K manual: