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October 28, 2026 Contractor Supplies

Engine Driven Pumps: How to Choose by Flow, Head, Solids and Material

Engine Driven Pumps: Complete Unit or Pump Head?

To choose an engine driven pump, start with the format. A complete unit arrives with the gas engine mounted on the pump. A pump head is the pump alone, built to be driven by an engine you already own. Our Engine Driven Pumps collection includes both.

The three pump heads here, Banjo 200PO, M225PO and 300PO, list a gasoline engine as a compatible power source, and the 200PO also lists an electric motor. Each lists a 3/4 in shaft, so confirm that your engine's shaft and mounting fit. If you only need the pump end, browse all pump heads.

A complete unit skips that matching step. Each listing gives the engine size, from 127 to 208 cc, and several name the brand: Honda, Briggs & Stratton or Koshin.

Key takeaways

  • A complete unit has the engine mounted. A pump head needs your own engine.
  • Flow falls as head rises, so read the gpm listed at your working head.
  • Each listing gives the largest solid the pump passes and what the body and seals are made of.
  • Match inlet and outlet size, thread or flange type, engine size and Mfr # for a replacement.

Flow and Head: What the Numbers Mean for Your Job

Head, measured in feet, is the energy a pump adds to each pound of liquid. The Hydraulic Institute describes a pump curve as the head a pump generates at flow rates from zero to maximum at a given speed. Zero flow is called shut-off, and the Hydraulic Institute warns that running there for more than a few seconds can cause serious mechanical issues. As head goes up, flow goes down.

That is why horsepower alone does not rank these pumps. The Banjo 6-1/2 hp poly unit (200P6PRO) lists 200 gpm at 10 ft of head, 160 gpm at 40 ft and 115 gpm at 80 ft, with a maximum head of 120 ft.

The chart compares eight models at 20 ft of head. The other four list flow at other heads: the Tsurumi TE3-80HA lists 245 gpm at 10 ft and 125 gpm at 60 ft, the 6CGH3 lists 158 gpm at 60 ft, and the cast iron 200PI-3 and 200PI6PRO list 165 gpm at 10 ft and 120 gpm at 40 ft.

Flow at 20 ft of head, in gpm, as listed on each product page
  • 300PO, 3 in pump head: 350 gpm
  • M300PH6W, 3 in complete unit: 250 gpm
  • 24D039, semi-trash unit: 204.5 gpm
  • 200PO, 2 in pump head: 190 gpm
  • M225PO, 2 in pump head: 190 gpm
  • 200P-3, 2 in complete unit: 190 gpm
  • 200P6PRO, 2 in complete unit: 190 gpm
  • 300P6PRO, 3 in complete unit: 190 gpm

Source: manufacturer data on each product page in the Engine Driven Pumps collection, read October 28, 2026. Definitions: Hydraulic Institute, Pump Curves.

Read the 300PO's 350 gpm with care. It is a bare pump head listed with a 5 hp maximum and a 69 ft maximum head, so check that figure against your own engine.

Engine driven pump specs from the collection listings, read October 28, 2026
Mfr # Format Body Inlet and outlet Power Max. head Max. solids
200P-3 Complete unit Polypropylene 2 in FNPT 3-1/2 hp, 127 cc Not listed 0 in
200PI-3 Complete unit Cast iron 2 in FNPT 3-1/2 hp, 127 cc Not listed 0 in
200P6PRO Complete unit Polypropylene 2 in NPT 6-1/2 hp, 208 cc 120 ft 0 in
200PI6PRO Complete unit Cast iron 2 in NPT 6-1/2 hp, 208 cc 100 ft 0 in
300P6PRO Complete unit Polypropylene 3 in NPT 6 hp, 208 cc 80 ft 0 in
M300PH6W Complete unit Polypropylene 3 in NPT, also listed as flanged 6 hp, 196 cc 100 ft 0 in
6CGH3 Complete unit Aluminum 3 in NPT 6 hp, 179 cc 90 ft 1/8 in
24D039 Complete unit, semi-trash Aluminum 3 in NPT 6 hp, 179 cc Not listed 3/4 in
TE3-80HA Complete unit, Honda engine Not listed 3 in MNPT 5.5 hp, 163 cc Not listed 3/8 in
200PO Pump head Polypropylene 2 in FNPT Up to 5 hp 92 ft 0 in
M225PO Pump head Polypropylene 2 in flanged inlet, 2 in FNPT outlet Up to 5.5 hp 50 ft 0 in
300PO Pump head Polypropylene 3 in FNPT Up to 5 hp 69 ft 0 in
Discharge pipe running across an open field

Solids, Materials and Seals: Match the Pump to the Liquid

Decide what the pump will move before you compare anything else. The listings give the largest solid each pump passes: 3/4 in on the Semi-Trash Pump (24D039), 3/8 in on the Tsurumi (TE3-80HA) and 1/8 in on the 6CGH3. The Banjo listings show 0 in, and two of them, the M300PH6W and the 300P6PRO, also say clear water. Ask the manufacturer before you send debris through any of them, and look at our trash pumps if solids are the main job.

  • Polypropylene: the Banjo poly units and all three pump heads. The 200P6PRO and 300P6PRO list liquid temperature up to 150°F.
  • Cast iron: the Banjo 200PI-3 and 200PI6PRO. The Tsurumi has a cast iron impeller.
  • Aluminum: the 6CGH3 and 24D039 bodies, with a cast iron or ductile iron volute.
  • Seals: EPDM on most Banjo poly units and the pump heads, carbon with ceramic on the 200P-3 and 200PI-3, and Buna N with silicon carbide on the semi-trash pump.

Warning: A listing shows what a pump is made of, not what it can safely pump. For acids, solvents, fuel or anything other than clean water, confirm compatibility with the manufacturer before you order.

Compare specs before you order

Each product page lists the Mfr # and the dimensions.

Compare Engine Driven Pumps

Connections, Engines and Priming: What to Check Before You Order

Every model in the collection has a 2 in or 3 in inlet and outlet. The connection standard matters as much as size. The Tsurumi has a male MNPT inlet, most Banjo listings say female, and the M225PO lists a flanged inlet while the M300PH6W lists both NPT and flanged. Match your fittings to what the listing says, and confirm with the manufacturer when it lists two standards.

Priming decides where the pump can sit. Several Banjo units list a 12 ft maximum self-priming lift, and the Tsurumi lists a 26 ft maximum suction lift. A listing that does not mention priming is not confirmed either way, and you can browse more self-priming pumps to compare.

The 6CGH3 lists EPA/CARB, and the 24D039 lists EPA III approved and CARB exempt. Those notes belong to the product, so confirm any engine rules for your site with the manufacturer.

For a replacement, run this check against the pump you have now:

  • Read the Mfr # on the pump's label and match it to the listing.
  • Measure the inlet and outlet size and note male or female threads.
  • Note the horsepower and the engine size in cc.
  • Confirm the shaft diameter and mounting on your engine if you are buying a pump head.
  • Write down your working head and the flow you need.
  • Check the largest solid your liquid carries against the listing.
  • Check the liquid temperature against the listed maximum.
  • Check the manufacturer's warranty length on the listing.
Close-up of a small gasoline engine on a work site

Engine Driven Pumps: Common Questions

Is a pump head the same as an engine driven pump?

A pump head is the pump without an engine. It becomes an engine driven pump once it is mounted on a compatible gasoline engine. The Banjo 200PO, M225PO and 300PO list gasoline engines as compatible power sources. A complete unit already includes the engine.

Can a pump head run on an electric motor?

Only the 200PO lists an electric motor as a compatible power source, next to gasoline engines. The M225PO and 300PO list gasoline engines only. For any other motor, confirm the shaft, speed and horsepower with the manufacturer before you pair it with a head.

How do I replace an engine driven pump?

Match the Mfr # first, then the inlet and outlet size, thread or flange type, horsepower, engine size, flow at your head and the largest solid. Every product page lists the Mfr # and UPC. If the Mfr # is unreadable, use the connection size and horsepower to narrow the choice, then confirm with the manufacturer.

What warranty comes with these pumps?

The listings show the manufacturer's warranty length: 1 year on the Banjo complete units and 2 years on the Tsurumi TE3-80HA. The listing gives the length only, so read the terms with the manufacturer. Contractor Supplies shipping and return terms are separate and are on the policy pages.

The Bottom Line

  • Replacing a pump? Start with the Mfr #. It leads straight to the matching listing.
  • Buying new? Write down your head, flow and liquid first. Then use the table to rule models out.
  • No engine on hand? Choose a complete unit. A pump head only makes sense if you already own a compatible engine.
  • Anything other than clean water needs a manufacturer check. The listing shows materials and solids size, not chemical compatibility.
  • Compare specs on the product pages. Each one lists dimensions, Mfr # and UPC.

Shop Engine Driven Pumps

These are the pumps in the collection as of October 28, 2026. Specs, availability and price are on each product page. For shipping and return terms, see our shipping and return and refund pages.

Complete units, 2 in connections

Complete units, 3 in connections

Pump heads, no engine

For other sizes and uses, read our guide to compact submersible centrifugal pumps or browse more posts on the Contractor Supplies blog.

Ready to match your pump?

Open the collection and compare models by connection size, horsepower and Mfr #.

Shop Engine Driven Pumps

Next article Compact Submersible Centrifugal Pumps: How to Choose by Head and Flow
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