Description
Engine Mount w/4" Footprint - 3/4" Stud - 250-563lbs Capacity Per Mount
- 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.
R & D Engine Mount 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.
Determining Engine Mount Weight Capacity
Below are the formulas to use to determine the required pounds per engine mount.
FormulasFront 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 |
- Find the center of gravity by balancing on a roller (If possible)
- 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 |
| 800-003 | 5/8 UNF | 100-180 lbs | 4" | 0.06" | 0.09" | 2.3" | 4.58" |
| 800-004 | 5/8 UNF | 160-370 lbs | 4" | 0.06" | 0.09" | 2.3" | 4.58" |
| 800-005 | 5/8 UNF | 320-500 lbs | 4" | 0.06" | 0.09" | 2.3" | 4.58" |
| 800-013 | 5/8 UNF | 340-760 lbs | 4" | 0.09" | 0.09"-0.21" | 2.93" | 5.38" |
| 800-033 | 5/8 UNF | 190 lbs | 4" | - | 0.065" | 2.3" | 5.37" |
| 800-036 | 5/8 UNF | 300 lbs | 4" | - | 0.065" | 2.3" | 5.37" |
| 800-040 | 5/8 UNF | 30-91 lbs | 4" | 0.07" | 0.07"-0.14" | 2.19" | 4.57" |
| 800-041 | 5/8 UNF | 70-171 lbs | 4" | 0.07" | 0.07"-0.14" | 2.19" | 4.57" |
| 800-037 | 5/8 UNF | 50-175 lbs | 4" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-010 | 5/8 UNF | 80-230 lbs | 4" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-012 | 5/8 UNF | 120-410 lbs | 4" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-014 | 5/8 UNF | 300-680 lbs | 4" | 0.09" | 0.09"-0.21" | 3.05" | 5.38 |
| 800-032 | 5/8 UNF | 100-420 lbs | 4"-5.5" | 0.19" | 0.19"-0.30" | 3.51" | 6" |
| 800-034 | 5/8 UNF | 160-670 lbs | 4"-5.5" | 0.19" | 0.19"-0.30" | 3.51" | 6" |
| 800-062 | 5/8 UNF | 50-176 lbs | 5"-5.5" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-024 | 5/8 UNF | 80-232 lbs | 5"-5.5" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-025 | 5/8 UNF | 120-412 lbs | 5"-5.5" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-026 | 5/8 UNF | 250-562 lbs | 5"-5.5" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-027 | 5/8 UNF | 300-682 lbs | 5"-5.5" | 0.09" | 0.09"-0.21" | 3.05" | 5.38" |
| 800-037Y | 5/8 UNF | 50 - 175 lbs | 6.85" (Yanmar) | - | - | 3.94" | 7.4" |
| 800-010Y | 5/8 UNF | 80 - 230 lbs | 6.85" (Yanmar) | - | - | 3.94" | 7.4" |
| 800-011Y | 5/8 UNF | 120 - 410 lbs | 6.85" (Yanmar) | - | - | 3.94" | 7.4" |
