Engines 1 - A Division of Western Branch Diesel

The Legend
The Universal Atomic 4
Replacement Information Page

When replacing your Universal Atomic4 engine choose the Best.  Universal built the original so why do you think there should be a second choice when looking for a replacement.  Your Atomic4 has lasted for 20 plus years.  Choose the engine built by the pro's.  They know how to make the change easier with fewer modifications to your boat.  And with Worldwide Service you will never have to look far for service or parts.  Look at all of your options below, then call for the best all around deal.


Universal Engine

For Boats Up To 28'
3 cylinders, 4 cycle, 43.8 cubic inches
20 horsepower @ 3600 rpm's
33 lb-ft of torque @ 2500 rpm's
241 lbs with gear
26.4" long x 18.8" wide x 20.1" tall
Fresh water cooled
11.5" or 16" mounting centers


Universal Engine M25XPB 26HP

Universal M25XPB Diesel
For Boats Up To 33'
3 cylinders, 4 cycle, 61.2 cubic inches
26 horsepower @ 3000 rpm's
47 lb-ft of torque @ 2440 rpm's
295 lbs with gear
28.4" long x 18.9" wide x 22.1" tall
Fresh water cooled
11.5" or 16" mounting centers

Universal Engine M35B

For Boats Up To 40'

4 cylinders, 4 cycle, 81.47 cubic inches
35 horsepower @ 3000 rpm's
62 lb-ft of torque @ 2460 rpm's
352 lbs with gear
32.7" long x 18.9" wide x 22.1" tall
Fresh water cooled
11.5" or 16" mounting centers

Installation Drawing For The M3-20B

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 Larger View

The Universal Admiral Panel.
Oil Pressure,
Water Temp.,
DC Volt Meter
Key Switch,
Preheat, Start Buttons

Installation Drawing For The M25XPB

With several options of exhaust elbows, you can be sure that you can get a perfect fit.  With choices that include a 90, 45, and a camelback riser.  All risers clamp onto the manifold end for a true and tight seal.

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Larger View

Installation Drawing For The M35B

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Larger View

Anti-Siphon vented loop.  Keeps raw water from entering engine through the exhaust system.

Atomic4 Sales


For Universal Atomic 4 literature, including spec sheet, owner manual, and parts manual-Click Here
For Technical and Parts Information - Click Here
For a quote or help with your Westerbeke Product give us a call

Click Here to get a quote

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