C7.1 High Performance Propulsion Engine

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The C7.1 marine propulsion engineis ideal for recreational boating applications, specifically smaller vessels and motoryachts ranging from 25 -60 feet in size. The engine features a common rail fuel system enabling optimum combustion and low emissions. The engines provide noticeably quiet operation due to reduced combustion noise through advanced electronic control. Additionally, no visible smoke is emitted from the C7.1 engines during operation.

Pricing: Contact for Pricing Why we quote: Cat® machines are often configured to your job (attachments, hydraulics, cab options) and freight/taxes can vary by location. Request a quote to get accurate pricing based on your exact setup—typically within 1–2 business days.

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Power Range	400 - 500 bhp (298 - 373 bkW)

Aspiration	Turbocharged - Aftercooled
Bore	4.13in
Configuration	In-line 6, 4-Stroke-Cycle Diesel
Displacement	428in³
Emissions	IMO II, U.S. EPA Tier 3, RCD II, China II
Rotation from Flywheel End	Counterclockwise
Speed Range	2900 rpm
Stroke	5.31in

Engine Dry Weight - Approximate	1676lb
Height	34.5in
Length - Engine	43.1in
Width - Engine	31.4in

Standard Equipment:

Water cooled turbocharger and exhaust manifold

Common rail fuel system
Fuel cooler
Electric fuel priming pump

Corrosion resistant sea water aftercooler
Gear driven sea water pump (rubber impeller)
Fin and tube type jacket water heat exchanger

Starter motors - 12V or 24V

Closed crankcase ventilation system
Integral engine oil cooler
Vibration damper and guard
Self-tensioning multi-vee alternator drive belt

Front and rear engine mounting brackets

Optional Equipment:

Transmission gear oil cooler (engine mounted)

Alternators - 24V 140 amp - 12V 175 amp
Instrument Panels
Glow plugs
Primary fuel filter/water separator (remote mount)
Selection of factory-fitted marine transmissions and oil hoses
Triple groove PTO pulley (crankshaft mounted)
Flexible fuel hoses

Jacket water heater
Cabin heater (calorifier) connections

6" water cooled exhaust elbow

Isolation mounts

Right-hand and high level left hand oil dipsticks

What Our Customers Are Saying About Us

Gregory Poole Equipment Company

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Tom Corona

21:51 06 May 26

Rich Stidd

22:10 02 May 26

Carlos Virgilio Sauceda Rivera

20:55 23 Mar 26

John Karpathian

16:21 24 Jan 26

Clean store and great employees

Hunter Flaugher

12:56 06 Aug 25

Hydraulic pump shop is unmatched. I made the mistake of going somewhere else before bringing my pump here. These guys were more than helpful and friendly. Went out of their way to help me find a solution for my problem even when it didn’t benefit them. This is how businesses should be run. I won’t go anywhere else.

Brian Hrudka

16:45 12 Feb 25

Too bad Poole Cat Field Service is better at invoicing than actually getting my machines moving.

A prompt and courteous technician arrived, and correctly diagnosed two problems with my mini Ex. Thank you. I corrected those problems, but machine still did not work.

He diagnosed a fuel problem as a clogged filter, rather than a bad fuel pump which I managed to diagnose. I also figured out, via help on the internet, that the fuel shut-off solenoid was bad.

Machine runs fine now. So my advice is to check the internet, before letting Poole charge you $870 for a two hour field visit. And you can find a perfectly fine aftermarket fuel pump for $20 rather than the $250 that Poole charges... and it arrives faster,

Jacey Price

21:04 05 Dec 24

Need to teach a tech how to drive a service truck. Around 2:48 on highway 40 east, the truck pictured (plate ending in 8236) flew across 3 lanes of traffic to meet the Cleveland rd exit. Almost hit a semi and caused me to swerve with my children in the car. Glad making the exit was more important than children’s lives.