Pacific Mariner 65 Motor Yacht

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About the Pacific Mariner 65 Motor Yacht

Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.

Illustration of a Pacific Mariner 65 Motor Yacht — **Illustration, not a photo of this model.** AI-generated illustration of a typical flybridge motor yacht.

Builder: Westport (Pacific Mariner Yachts), Washington
Designer: William Garden
Length: 64.92 ft
Beam: 17.25 ft
Draft: 4.75 ft
Hull: fiberglass-cored
Hull / keel: planing
Propulsion: inboard
Fuel: 1,100 gal
Water: 285 gal

Sources disagree on first year, last year, displacement, engines[MTU].hp, holding tank — left blank rather than guessed.

Only model of the make in this group and larger than the 26-50 ft focus. Turnkey yacht built in Washington; cored hullsides, solid glass bottom, low deadrise (10 deg). Three staterooms, crew quarters aft. Upgraded SE version from 2003 (hull #37).

Known problems for this model

Dated helm electronics electrical
Many PM65s still carry bulky original radar and sounder units in a two-tier helm, leaving room for a modern multifunction-display refit.
powerandmotoryacht.com
Narrow side decks deck
HMY notes the side decks are narrow.
hmy.com

Engines & parts

Detroit Diesel Series 60 (marine) parts: good

Factory optional engine — you entered “MTU / Detroit Diesel Series 60”

Four-stroke electronic (DDEC I–IV) inline six in 11.1 L (1987–1998), 12.7 L (1987–2007) and 14.0 L (2001–2011) versions per a marine service guide. Shares the huge truck population, so parts are plentiful; DDEC diagnostics need proper software/tools.

Parts sources: Diesel Pro Power (Detroit Diesel parts)

Common problems (2)

DDEC fault codes and electronics electrical
Owners wrestle with DDEC diagnostic codes; early DDEC control problems were often traced to battery/voltage issues.
yachtforums.com · marinetechsvcs.com
Smoke, power loss and overheating engine
Marine service guides list excessive smoke, power loss, overheating and internal noises as the usual Series 60 complaints; the highest-rated versions had more issues and are tall for some engine rooms.
marinetechsvcs.com · samsmarine.com

Model sources (2)

hmy.com · powerandmotoryacht.com

Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.