example

FLEXIBLE ENGINE MOUNTS

ENGINE SPARES & GEARBOXES

Flexible engine mounts, sometimes referred to as flexible feet, are designed to isolate vibration and noise transmission. Common applications include engines, gearboxes, gensets and drive motors. Marine engine mounts should be able to absorb the thrust of the propeller while holding the engine in line within the tolerances of the shaft coupling. We recommend that flexible engine mounts are changed in pairs, i.e. both front flexible mounts / both rear flexible mounts or all four flexible mounts. As a guide, to select the best flexible engine mountings for your application, consider the following:

• • •

Engine model and number of cylinders Model of gearbox and reduction ratio Total weight of engine and gearbox

Weight on each front mount = W x b 2 x (A + B) Weight on each rear mount = W x a 2 x (A + B)

• Is the flywheel in the conventional place between the engine and the gearbox? • Position of the engine mountings • Find the centre of gravity (balance point). If you cannot find the centre of gravity, then you may wish to assume that the weight distribution is 60% on the rear flexible mountings and 40% on the front flexible mountings, if the rear mounting is in line with the flywheel

A

B

Front mount point

Balance point

Rear mount point

Please contact us if you require any help with the correct selection for your application.

Figure 1 Compression mount 207004

Figure 2 Super mount 207014

Figure 3 Super mount 207035

Figure 4 Super mount 207017

Figure 5 Compression mount 207033

Figure 6 Compression mount 207041

Loading per mount shown in lbs (1kg = 2.2lbs)

12mm stud

5/8” stud 3/4” stud Figure ref.

Typical use (see note)

Overall base length mm

Maximum base width mm

Base fixing hole centre mm

Minimum mount height to stud base* mm

Overall mount height mm

- - - - - - - - - - - - - - - - - - - -

207003 - 207004 - 207005 -

100-180 160-370 320-500 80-230 120-410 250-560 340-760 300-680 500-1201 650-1500 880-2000 80-232 120-412 250-562 300-682 100-420 160-670

1 1 1 2 2 2 3 2 4 4 4 2 2 2 2 6 6 5 5 2 6 6

A, C, D A, C, D A, C, D B, C, D B, C, D

130 130 130 127 127 127 127 127 165 165 165 165 181 181 130 130 127 128 128

76 76 76 62 62 62 85 62 62 62 62 62 79 79 71 71 62 51 51

102 102 102 102 102 102 102 102

43 43 43 64 64 64 60 64 64 64 64 64 75 75 42 42 64 41 41

118 118 118

207010 207020 207011 207021 207012 207022 207013 207035 207014 207023

137 / 165 137 / 165 137 / 165 137 / 152 137 / 165

C, D C, D C, D

- - -

207015 207016 207017

D D D

174.63 174.63 174.63

101.6 101.6 101.6

139.7 139.7 139.7

86.62 86.62 86.62

192 192 192

207024 207028 207025 207029 207026 207030 207027 207031

C, D C, D C, D C, D

127 127 127 127

137 / 165 137 / 165 137 / 165 137 / 165

207032 -

A A

102 + 140 102 + 140

153 152 144 144 137

207034 207042

207033 - 207036 - 207037 -

190 300

A, B, C A, B, C

102 102 102 102 102

50-175

B, C

207038 207040 - 207039 207041 -

30-90

B B

100 / 116 100 / 116

70-200

* Minimum mount height to stud base = Minimum height excluding first adjusting nut.

A = 2 and 3 cylinder long stroke. B = 1, 2 and 3 cylinder short stroke high speed, C = 4 cylinder, D = 6 cylinder and more.

Compression mounts are lower in height and give reduced isolation compared to shear and super mounts. Clearance between the underside of the height adjusting nut and the top washer of the mount should not be more than 0.375” (9mm). If required, increase the height with a spacer under the mount. The first adjusting nut adds approximately 10mm to minimum height.

99

info@asap-supplies.com

www.asap-supplies.com

01502 716993