Contact us at 248-650-0603
Contact us at 248-650-0603

Dual-Flex Engine Mounts

By eliminating metal-to-metal contact, “Dual-Flex” Marine and Industrial Engine Mounts remove the danger of any excessive impact. The “Dual-Flex” mount design provides a synthetic rubber insulated engine mount for use on Gas and Diesel Marine Engines and in Industrial applications, and provides the following benefits.

  • Reduce Vibration
  • Absorb Shock
  • Reduce Noise
  • Resist rust with Aluminum Housings and Zinc Trivalent Plated Steel Components
  • Marine Mounts Available with E-Cote Protection

The special design and construction of the “Dual-Flex” Engine Mount give your application a soft, cushioning effect under normal loads. There is no metal-to-metal contact between supporting and mounting members. As loads increase from normal, the resistance of the mount increases very rapidly with a small amount of deflection.

Adjustable and Withstands Hostile Environments

Both vertical and lateral adjustment features are part of the design. The threaded stud on each mount is equipped with hex jam nuts. Simply turn the lower nut to bring the engine to the exact height you desire. Then lock the upper nut to hold it in position. Slotted holes are included in the casting to provide for lateral adjustment at installation.

The Dual-Flex has a synthetic rubber element that will withstand temperature extremes and exposure to salt, oil and grease.

Dual-Flex mountings are available in several different sizes for most models of marine engines. Many models are available from stock for off-the shelf delivery. Consult the new engine model / mount cross reference to determine our suggested mounting based on past applications.

Engine Model to Mount Cross-Reference – 4 point mountings

 Download Printable Cross Reference Table

If you know your engine make/model, or the weight of your installation the following chart will help you select the correct “Dual-Flex” mount for your application.

Important Notice

Suggested mounts are based on past applications with four point mounting configurations. Since engines, marine gears, engine mounted accessory weights, horsepower, and installations are variable, it is important to make certain that total package installed weights do not exceed mount capacities.
*Suggested Mounts are based on actual applications – make sure to compare the listed mount weight capacities against your actual combined engine, gear, and other engine mounted accessory weights. Do not exceed listed four (4) point mounting capacities.

STERN DRIVE INSTALLATIONS

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
All 4 and 6 Cylinder and V8 GAS Engines 500-1200 80-500+ DF-216 4.0″ 3/4″–16
Where Additional Clearance is Desired 500-1200 80-500+ DF-216-B3 3 5/8–4 5/8″ 3/4″–16
All 4 and 6 Cylinder and V8 GAS Engines up to 800 80-375 Use DF-206 for 5/8″ stud 4.0″ 5/8″–18

INBOARD INSTALLATIONS

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
Gas Inboard Rear Mount (Transmission End) 500-1200 80-500+ RM-1060 4.0″ 3/4″ – 16

CATERPILLAR DIESEL ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
3116/3126/C7/C9 1500-2400 205-500 DF-9106 5.0″ 1″ – 14
3208/3304B 1700-2200 85 up to 340 DF-238-M1 5.0″ 3/4″ – 16
3208 1700-2600 >340 DF-4408-4 5.0″ 1″ – 14
3308C / 3406E / 3176B / 3306C 1600-3800 500-820 DF-4407-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

CHRIS-CRAFT ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
181-F 650 130 DF-2207-2 4.0″ 5/8″ – 18
305-F/350K/350KBM 500-1200 250-330 DF-216 4.0″ 3/4″ – 16
  Up to 800 250-330 Use DF-206 for 5/8″ stud 4.0″ 5/8″ – 18
All 454 engines 1200 330-425 DF-216 4.0″ 3/4″ – 16

CUMMINS DIESEL ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
4BT/6BT 800-1600 150 DF-477-M3 5.0″ 3/4″ – 16
QSB Up to 2800 230-500+ DF-4408-4-M5 5.0″ 1″ – 14
6C Series 1800-2300 150-450 DF-9106 5.0″ 1″ – 14
V-504/555-M 1800-2200 200-250 DF-238-M1 5.0″ 3/4″ – 16
VT-555-M 2200-2500 270 DF-4407-4 5.0″ 1″ – 14
V-903-M 2800 305-360 DF-4408-4 5.0″ 1″ – 14
NTA855, QSM 11 Engines 2800-4200 215-635 DF-4408-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

DETROIT DIESEL ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
 6.2/4-53/8.2/6V53/6V53T/471N 700-2400 130-420 DF-238-M1 5.0″ 3/4″ – 16
 471TI/6-71/6-71TI/6V71/6V71TA 2200-2800 250-550 DF-4408-4 5.0″ 1″ – 14
 8V71/8V71TI/6V92/6V92TA/8V92/8V92TA 3500-4200 650-720 DF-4408-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

DUETZ ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
 F1L208/F1L210/F1L511/F2L511 190-425 13-28 DF-2205-2 4.0″ 5/8″ – 18
 F2L912/F3L912/F4L/912/F5L912 600-1200 36-200 DF-216 4.0″ 3/4″ – 16
 F6L912/BF6L913 Up to 800 36-200 Use DF-206 for 5/8″ stud 4.0″ 5/8″ – 18
 V-6 & V-8 Engines 1250-2800 210-500 DF-4408-4 5.0″ 1″ – 14
 V-6 & V-8 Engines 3400-4200 520-600 DF-4408-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

FORD ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
LSG/CSG/WSG (Gas engines) 200-480 120-245 DF-206 4.0″ 5/8″ – 18
YSD-424/YSD-635/SSD437/DSD-442 (Gas engines) 500-800 250-325 DF-216 4.0″ 3/4″ – 16
SSD655N/655T/DSD659/DSD659/660/662
(Gas engines)
950-1500 300-480 DF-236-M1 5.0″ 3/4″ – 16
DSD-681N/T (Gas engines) 1500-1600 500 DF-237-M1 5.0″ 3/4″ – 16
Lehman & Merlin Diesel 2800  300-475 DF-4408-4 5.0″ 1″ – 14
Ford Gas Generators VSG411/413/ LSG423 200-450 20-75 DF-2205-2 4.0″ 5/8″ – 18
LSG875/CSG649 470-725 80-200 DF-2207-2 4.0″ 5/8″ – 18
Ford Diesel Engines & Gen ESD442 Marine 290 80-100 DF-2205-2 4.0″ 5/8″ – 18
All other ESD/BSD Series Engines 800-1400 150-300 DF-236-M1 5.0″ 3/4″ – 16
NOTE: If your Lehman engine currently has
4″ hole center mounts with 3/4″ stud use the DF-216
       

ISUZU ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
QD27 400-500 14-28 DF-2207-2 4.0″ 5/8″ – 18
QD40/60 500-750 40-60 DF-3304-3 4.5″ 3/4″ – 16
QSD130/145 1100-1400 130-145 DF-3306-3 4.5″ 3/4″ – 16

IVECO ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
8041SRM15/8061M05 900-1500 140-150 DF-236-M1 5.0″ 3/4″ – 16
8061SM05/06/8061SRM 05 & 06 & 27 1160-1800 190-270 DF-237-M1 5.0″ 3/4″ – 16
8361SRM10 & 37 1500-1800 285-420 DF-4407-4 5.0″ 1″ – 14
8281SRM70 3700-4200 500-700 DF-4408-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

JOHN DEERE ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
3.9 Liter & 4.5 Liter 1000-1200 70-150 DF-236-M1 5.0″ 3/4″ – 16
6.8 Liter 1500-1800 155-230 DF-237-M1 5.0″ 3/4″ – 16
7.6 & 8.1 Liter 1800-2200 240-450 DF-238-M1 5.0″ 3/4″ – 16
9.0 Liter 2350 325-500 DF-4408-4 5.0″ 1″ – 14
12.5 Liter 2500-2800 240-450 DF-4408-4 5.0″ 1″ – 14

PENINSULAR ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
All Models 500-2000 110-450 DF-238-M1 5.0″ 3/4″ – 16

PERKINS ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
M20/M30 240-300 17-50 DF-2205-2 4.0″ 5/8″ – 18
M35 – M90NA 450-650 33.5-80 DF-2207-2 4.0″ 5/8″ – 18
4-108M/4-154M 465-700 50-60 DF-2207-2 4.0″ 5/8″ – 18
M135/ 165T/ 200TI/ 240TI/ 275TI/ 4-236M 840-1500 85-250 DF-236-M1 5.0″ 3/4″ – 16
T6-3544M/ ST6-3544M/ SSTT6-3544M 1250-2100 135-200 DF-4406-4 5.0″ 1″ – 14
TV8-540M 2200-2500 350 DF-4407-4 5.0″ 1″ – 14

RENAULT ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
RC8D/11D/12D/16D 180-450 0-20 DF-2205-2 4.0″ 5/8″- 18
RC30D 500-700 30-50 DF-2207-2 4.0″ 5/8″- 18
RC55D/80D/90D/RC130DTS & 140 750-1400 55-160 DF-236-M1 5.0″ 3/4″ – 16

UNIVERSAL ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
Model 12, 18, 20, 25, 25XP, 30 175-450 0-35 DF-2205-2 4.0″ 5/8″- 18
Model 40, 50 490-700 40-50 DF-2207-2 4.0″ 5/8″- 18
M3-20/M4-30 235-450 18-25 DF-2205-2 4.0″ 5/8″- 18
5444/M4-44 & 50 480-550 45-60 DF-206 4.0″ 5/8″- 18
ATOMIC 1 130 10 DF-2204-2 4.0″ 5/8″- 18
ATOMIC 2/ ATOMIC 4/ STEVEDORE (Includes model 5411, 5416, 5424) 175-335 0-30 DF-2205-2 4.0″ 5/8″- 18
ATOMIC Model 5432 490 30-40 DF-2207-2 4.0″ 5/8″- 18

VOLVO ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
MD5A/6B/7A 245-385 7.5-13 DF-2205-2 4.0″ 5/8″- 18
MD11C/17C/MD17C-110S/MD21A 500-750 23-61 DF-2207-2 4.0″ 5/8″- 18
TMD31/TAMD31/MD32A 740-900 62-150 DF-3304-3 4.5″ 3/4″- 16
TMD40A/TMD40A/TMD41/TAMD41 1000-1100 117-200 DF-3306-3 4.5″ 3/4″- 16
TAMD60A/61/MD70B/TAMD70B/C 1800-2200 150-310 DF-236-M1 5.0″ 3/4″- 16
TAMD42/THAMD70C/TAMD71/MD70E 2000-2400 200-430 DF-4407-4 5.0″ 1″ – 14
TMD120A/TAMD120A/TAMD122 2200-4200 260-450 DF-4408-4 Light End 5.0″ 1″ – 14
      DF-4428-4 Heavy End 9.0″ 1″ – 14 @ 2

WESTERBEKE

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WESTERBEKE Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
W-10, W13, W18,W21,W21A,W27 200-450 0-27 DF-2205-2 4.0″ 5/8″ – 18
W33, W46, W52, W58, W70 500-750 33-70 DF-2207-2 4.0″ 5/8″ – 18
W80, W100, W120 800-1400 80-120 DF-236-M1 5.0″ 3/4″ – 16

YANMAR ENGINES

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Engine Model Weight lbs HP Range Suggested Mount* Hole Centers Stud Size
GM Series 100-320 9-28 DF-2205-2 4.0″ 5/8″ – 18
3JH Series 390-425 35-50 DF-2205-2 4.0″ 5/8″ – 18
4JH Series 490-550 50-100 DF-2207-2 4.0″ 5/8″ – 18
4LH Series 750-900 110-170 DF-3304-3 4.5″ 3/4″ – 16
6LP Series 700-900 260-315 DF-235-M4 4.0″ 3/4″ – 16
6LYA-CX Series 1300-1500 315-465 DF-9106 5.0″ 1″ – 14
6CX- GTE2 Series 1800-2400 490-500 DF-9106 5.0″ 1″ – 14

 Note 1: DF2200 Series Mounts available as DF2200 – 2 (with 5/8″ stud) or DF-2200-1 (with 1/2″ stud)

 Note 2: Use DF-3300 Series Mounts for 4 1/2″ hole centers (with 3/4″ stud)

 Note 3: Use DF-100 Mount for 1 7/8″ minimum clearance

 Note 4: DF-242 Series – Twin stud/double mount with 3/4″ stud

 Note 5: Use DF-236-M3 Series in place of the DF-236-M1 Series where 5/8″ stud is required
(consider torque requirements when specifying)

*Suggested Mounts are based on actual applications – make sure to compare the listed mount weight capacities against your actual combined engine, gear, and other engine mounted accessory weights. Do not exceed listed four (4) point mounting capacities.

Need Additional Assistance?

For additional application assistance, contact us at the factory by phone 248-650-0603, fax 248-650-0606 or by e-mail.