Engine Mounts (12mm Stud)

800-038

$ 130.00 USD

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Size Guide

Description

  • Designed for marine use, accepts propeller and engine thrust in both directions.
  • Offers a fail-safe design.
  • Are height adjustable.
  • Pre-loaded to reduce movement.
  • Slotted holes in the base to assist in alignment.
  • Mount types to fit all applications.

The R&D Marine Engine Mounts are designed specifically for the rigors of marine applications. The mounts are stiff enough to absorb forward and reverse propeller thrust yet soft enough to isolate drivetrain vibrations from the hull.

To help increase the longevity of the mounts, all steel parts are zinc plated and passivated to limit corrosion. The rubber component is covered by an oil shield to protect it from petroleum-based products.

R&D Marine mounts are preloaded based on the combined engine and transmission weight to limit engine movement. To facilitate the ease of installation, the mounts are height adjusting, and the mounting holes in the base of the mount are slotted to assist in the alignment of the drivetrain.

Available for most brands such as Yanmar, Perkins, Universal, Westerbeke, and many more.

Determining Engine Mount Weight Capacity


Below are the formulas to use to determine the required pounds per engine mount.

Formulas

Front Engine Mount

(W x 0.4) x 0.5 = lbs per mount

Back Engine Mount

(W x 0.6) x 0.5 = lbs per mount

W = weight of engine and gearbox

Example:

Total weight of engine and gearbox = 1,200 lbs.

Front Engine Mount

(1,200 x 0.4) x 0.5 = 240 lbs per mount

Back Engine Mount

(1,200 x 0.6) x 0.5 = 360 lbs per mount


General Weight Distribution
R&D Marine Engine Mount weight distribution
  1. Find the center of gravity by balancing on a roller (If possible)
  2. If the center of gravity cannot be found, assume a weight distribution of 60% on the rear engine mounts, with 40% on the front engine mounts (if the rear engine mount is in line with the flywheel)

Technical Specifications


Part # Stud Size Capacity Per Mount Foot Print Mount Pre-Loaded Deflection Minimum Height Maximum Height
800-038 12mm 30-90 lbs 4" 0.07" 0.07" - 0.14" 2.03" 3.9"
800-039 12mm 70-170 lbs 4" 0.07" 0.07" - 0.14" 2.03" 3.9"