Engine Mount (5/8" Stud) Dimensions

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
800-003 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"