IsoFlex IFC-6300-HT Flexible Coupling Disc – Globe DriveSaver 7256PR Replacement
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The IsoFlex IFC-6300-HT Gear Guard is a high-performance flexible gearbox coupling designed to protect marine driveline systems by absorbing shock loads, reducing vibration, and compensating for minor misalignment between the transmission and propeller shaft.
Manufactured from IsoFlex’s engineering-grade polymer, this coupling acts as a sacrificial drivetrain component, designed to fail before damage occurs to expensive gearboxes, shafts, or engines. It provides a non-metallic barrier that isolates vibration and significantly reduces drivetrain noise and gear chatter.
This model is a direct equivalent to the Globe DriveSaver 7256PR, making it a common upgrade or replacement in marine propulsion systems using Allison, ZF, and Newage transmissions.
Key Features
- IsoFlex high-torque (HT) flexible coupling
- Equivalent to Globe 7256PR DriveSaver
- Absorbs vibration, shock, and torsional loads
- Compensates for minor driveline misalignment
- Protects gearbox, shaft, and engine components
- Engineering-grade polymer construction (oil/fuel/water resistant)
- Acts as a sacrificial “fuse” in drivetrain failures
Compatibility
Transmission Compatibility
Commonly used with:
-
Allison Marine Transmissions
- M11, M15, M17, M20
-
ZF Marine Transmissions
- ZF 220V
- ZF 305-2 / 305-2A
- ZF 302 / 310 / 311 / 311A
-
Newage / PRM Transmissions
- PRM 601
- PRM 1000
- PRM 1200S
- PRM 1500S
- PRM 1750S
Globe / DriveSaver Cross Compatibility
- Direct replacement for:
- Globe 7256PR DriveSaver
- DriveSaver Plus Rated 7-1/4" coupling systems
Marine Driveline Applications
Used in:
- Inboard marine engines
- Shaft-driven propulsion systems
- Commercial and recreational vessels
- Diesel marine drivetrains (mid to heavy-duty)
➡️ Suitable for pleasure craft, charter boats, and commercial vessels depending on torque rating
Serial Number Fitment Notice
Fitment depends on:
- Gearbox flange size (7-1/4" required)
- Bolt pattern (6-bolt configuration)
- Torque requirements of engine/transmission
⚠️ Always confirm compatibility using your flange dimensions and transmission model before ordering.
Specifications (Fitment Critical)
- Flange Diameter: 7-1/4" (184 mm)
- Bolt Pattern: 6 bolt
- Bolt Size: 5/8" (≈M16)
- Bolt Circle: 6" (152 mm)
- Pilot Diameter: 3-3/4" (95 mm)
- Outside Diameter: ~8.3" (212 mm)
- Thickness: ~1-1/2" (38 mm)
- Material: Engineering-grade polymer
What’s Included
- IsoFlex flexible coupling disc (IFC-6300-HT)
- Hardware may vary depending on configuration
When This Part Needs Replacement
Replace the coupling if you notice:
- Excessive vibration or noise
- Visible cracking or deformation
- Driveline shock damage
- Coupling failure after impact (log, rope, etc.)
Installation Notes
- Install between transmission and shaft flange
- Ensure proper alignment before tightening
- Torque bolts evenly in sequence
- Verify clearance and shaft alignment after install
- Replace bushings/hardware if worn
Alternate / Superseded Part Numbers
OEM Cross References
- IsoFlex: IFC-6300-HT
Major Cross References
- Globe: 7256PR (DriveSaver)
Related Components
- IsoFlex T-Bushing Kits (e.g., TBUSHKIT3/4)
- IsoFlex Flexible Couplings (IFC series)
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
This is a classic 7-1/4" 6-bolt coupling size—very common on ZF and Allison setups. If you’re replacing a DriveSaver 7256PR, this IsoFlex unit is a direct match 👍
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.