RKV4G36D-F24VR35 | 4 GPM 3500 PSI Gas Engine Pump with VR35 Unloader, 1 in. Hollow Shaft
The RKV4G36D-F24VR35 is an Annovi Reverberi RK triplex plunger pump rated 4.0 GPM at 3,500 PSI at 3400 RPM, with an AR VR35 unloader already installed. It slides onto a 1 in. engine shaft, bolts to the engine face, and is ready to plumb: no belts and no separate unloader to buy.
The VR35 is a heavier-duty unloader than the Gymatic, rated well above this pump at 5,100 PSI and 8 GPM, with an external bypass port that sends bypass water out of the pump instead of recirculating it inside. The crankshaft-driven triplex with ceramic plungers is built for daily work and rebuilds with a kit when the seals finally wear.
What’s in the Box
- RKV4G36D-F24VR35 pump with F24 engine flange
- VR35 unloader, installed
- Crankcase oil, pre-filled at the factory
- Vented dipstick. The pump ships with a shipping plug in the oil port. Swap in the dipstick before the first start.
- Engine mounting bolts and lock washers
- Operation manual and parts schematic
- 5-year Annovi Reverberi warranty
The shaft key is not included. It comes with your engine, and its size is set by the engine maker.
Will It Fit My Machine?
- Shaft: your engine has a 1 in. keyed horizontal shaft.
- Mount: the engine face matches the F24 flange bolt pattern.
- Engine size: 389cc to 420cc (13 HP class and up).
- Bypass line: the VR35 has an external bypass port. Run a bypass line back to the tank or pump inlet.
- Detergent: no chemical injector. For one built in, see the RKV4G35D-F24C2I.
Not sure? Text a pump specialist at (505) 226-6061 with a photo of your engine tag and we’ll confirm the fit.
What Else You’ll Need
- Thermal relief valves and inlet filters: the thermal valve protects the pump during long bypass periods, and the filter keeps debris out of the valves.
RKV4G36D-F24VR35 Specifications
- Model: RKV4G36D-F24VR35
- Flow: 4.0 GPM
- Max Pressure: 3,500 PSI
- Speed: 3400 RPM (engine speed)
- Gas Engine Size: 389cc to 420cc
- Shaft: 1 in. hollow
- Mount: F24 engine flange
- Unloader: AR VR35, installed, external bypass
- Plungers: Ceramic
- Max Water Temperature: 140°F
- Weight: 21 lbs
- Warranty: 5 years
- Brand: Annovi Reverberi
Shipping: Usually ships via UPS in 1 to 3 days.











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