Pearson 365 Engine Repower / Replacement

Monohull Sailboats

Repower Specifications

LOA: 36.42”
LWL: 30’
DISPLACEMENT: 17,700 lbs
BUILDER: Pearson Yachts


Typically seen with a ketch rig. Sloop, and pilot house versions were also made. It is a solid coastal cruiser that has crossed oceans.  The shoal daft design makes it a popular boat for the islands.

Pearson built over 400 of the P-365 model. This makes them readily available on the used boat market.


Westerbeke W-40 & Perkins 4.108 with a shaft drive turning a 2:1 remote Walter V-drive.

Repower Recommendations

The Beta 35 is the preferred engine for this vessel.  The Beta 35 has a maximum engine speed of 2800 RPM.  This is important because when coupled to a 1:1 ratio, transmission, this combination works just right with the original 2:1 ratio Walter V- Drive.  This package provides the correct power and propeller speed for best efficiency. A higher RPM engine even with more HP is less desirable for this repower.

Installation Considerations


  •     Beta marine offers a Velvet Drive adaptor kit for all of our larger engines. This allows the installer to maintain the geometry of the original installation.
  •     The Beta marine stainless steel reversing exhaust elbow works especially well for v-drive installations.
  •     Propeller size is usually limited to 16” or 17” diameter on this vessel.

Other Resources

The Pearson 365 is one of the most common boats we repower with Beta Marine diesel engines. We have extensive engine replacement experience with this model and have a history of happy customers. We have pictures, drawings and measurements for reference as well. Contact us to discuss your boat in more detail, or add to our forum discussion on this specific boat model through the link below.

Pearson 365 Forum Discussion

Pearson 365 Boat Review by Spinsheet


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