• Description

JP-3504-3MKB Gas Pressure Washer — JP Series 3500 PSI, 3.5 GPM with Kohler CH440

The Mi-T-M JP Series JP-3504-3MKB is the Kohler-powered version of the JP 3,500 PSI platform, pairing the same AR crankshaft pump and JP frame with a 429cc Kohler CH440 OHV engine. Output is identical to the Honda and Mi-T-M engine variants: 3,500 PSI at 3.5 GPM, 12,250 cleaning units. The Kohler CH440 is the largest single-cylinder in Kohler's CH commercial series, used in heavy-load outdoor power equipment — its full-pressure lubrication system is rated for longer duty cycles than splash-lube designs at this displacement.

JP-3504-3MKB Kohler CH440 Engine and Pump System

The CH440's full-pressure lubrication is a meaningful specification for sustained daily operation — it maintains oil pressure to bearing surfaces regardless of operating angle or load fluctuations.

  • 3,500 PSI at 3.5 GPM (12,250 CU) — same output as Honda and Mi-T-M variants; engine choice does not affect pump output
  • 429cc Kohler CH440 OHV engine — Kohler's largest CH-series single; full-pressure lubrication, cast-iron sleeve, commercial warranty
  • AR crankshaft pump — triplex ceramic plunger; rated for sustained high-output operation at 3.5 GPM and 3,500 PSI
  • 48-inch lance, 50-foot non-marking hose — extended reach for fleet vehicles and large equipment from one position
  • 10-inch flat-free tires, 40-inch powder-coated steel frame — job site rated; 142 lbs requires two-person trailer loading
  • Adjustable pressure unloader — scale output pressure down for vehicle washing without nozzle changes

JP-3504-3MKB Applications and Environments

Municipal equipment yards, agricultural cooperatives, and construction operations that run Kohler-powered equipment benefit from consolidated engine purchasing with this model. The CH440's full-pressure lubrication makes it a practical choice for machines running 4–6 hour daily wash cycles — the lubrication system sustains oil pressure under sustained high-torque load better than splash-lube engines at the same displacement. Fleet washing operations cleaning semi-trucks, tankers, and construction equipment get 12,250 CU throughput from a machine that integrates with their existing Kohler service program.

JP-3504-3MKB GPM, PSI, and Nozzle Configuration

Rated at 3.5 GPM at 3,500 PSI (12,250 cleaning units) at rated flow. Includes 0°, 15°, and 25° quick-connect nozzles; 50-foot × 3/8-inch non-marking hose; 48-inch lance with insulated trigger gun. Cold water only. 49-state Kohler CH440 — not for sale in California.

Specifications

PSI 3,500 PSI at rated flow
GPM 3.5 GPM
Cleaning Units 12,250 CU (PSI × GPM)
Engine 429cc Kohler CH440 OHV
Pump Type AR Crankshaft
Unloader Mi-T-M Adjustable Pressure
Hose 50 ft × 3/8 in non-marking
Lance 48 in
Nozzles Included 0°, 15°, 25°
Net Weight 142 lbs
Dimensions (L × W × H) 40 × 22.5 × 24.5 in
Hot/Cold Cold water only
California Sale Not for sale in CA (49-state engine)

Documents

Spec Sheet
Manual

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