Twin Disc MG518 Marine Transmission Parts - Overhaul Plate Kit Section

Twin Disc MG-518 Marine Transmission Parts — Overhaul Plate Kit Section

Choose Diesel Pro Power for your Twin Disc MG-518 overhaul because we remove guesswork and downtime. Our catalog is MG-518–specific (no cross-model confusion), backed by deep, ready-to-ship inventory for fast turnarounds, and documented with technician-first guidance that maps symptoms to the exact kit or mount you need. Every component is quality-checked for fit and finish—from friction/steel flatness to elastomer durability—so the gear engages cleanly after install. You also get specialist support from a team that works MG-518 systems every day and a track record of 40,000+ satisfied customers who trust our accuracy, consistency, and post-sale help.

Overhaul Plate Kit for Twin Disc MG-518

What this part is
A complete clutch-pack renewal engineered specifically for the Twin Disc MG-518. Replacing the friction and steel plate stack restores clean take-up, consistent torque transfer, and predictable shifting under load.

What it includes

• Friction plates specified for MG-518 control pressures and thermal cycles.
  
  

• Steel separator plates precision-ground for flatness/parallelism to prevent hot spots.
  
  

• Stack-height guidance to achieve the correct clutch pack height and plate order.
  
  

• Assembly aids (where applicable) to simplify staging, indexing, and pre-lube.
  
  

What it fixes

• Slip under throttle in ahead or astern.
  
  

• Delayed, harsh, or double-bump engagement from glazed frictions or warped steels.
  
  

• Burnt-odor oil and dark debris pointing to overheated clutch material.
  
  

• Uneven maneuvering control during docking and tight-quarters work.
  
  

Signs you likely need this kit

• RPM flare without proportional vessel movement when shifting into gear.
  
  

• Shudder on pickup or a grab–release–grab feel at low throttle.
  
  

• Heat rise in the gearbox after frequent low-speed maneuvers.
  
  

• Metallic/fibrous residue showing up in the oil strainer soon after service.
  
  

Installation highlights

• Measure as-found pack height; document plate count and clearances before teardown.
  
  

• Dry-stage the stack to confirm order/quantity, then pre-lube all plates.
  
  

• Inspect steels for warp or bluing; replace any heat-spotted components.
  
  

• Torque clutch carrier hardware to spec in a cross pattern; verify runout.
  
  

• Commissioning: warm, no-load run-in → progressive load checks → recheck oil and leaks.
  
  

Related MG-518 work to consider

• Gasket & seal refresh if covers/bores are opened during clutch service.
  
  

• Oil strainer cleaning/replacement to protect fresh clutch surfaces from residual debris.
  
  

• Mount isolator inspection to keep alignment stable and prevent chatter returning.
  
  

Rubber Block (Mount Isolator) for Twin Disc MG-518 Installations

What this part is
A marine-grade vibration isolator that supports and stabilizes the MG-518 and adjacent drivetrain. Proper isolation reduces shock transfer to the hull, helps alignment hold, and extends seal/bearing life.

What it includes

• High-durometer elastomer element designed for combined compression and shear loads.
  
  

• Bonded/captured interfaces (design varies) for secure mounting and repeatable preload.
  
  

What it fixes

• Persistent vibration at cruise or specific RPM bands.
  
  

• Alignment drift that returns after “perfect” shaft alignment.
  
  

• Premature coupling, seal, or bearing wear associated with rigid/fatigued mounts.
  
  

• Knock/bump felt when shifting from neutral into gear due to excessive movement.
  
  

Signs you likely need this part

• Compression set, cracks, or delamination visible on existing mounts.
  
  

• Vibration worsens under load but eases off-throttle.
  
  

• Recurring alignment corrections or repeated input/output seal weep.
  
  

Installation highlights

• Replace in matched sets to maintain even support height and stiffness.
  
  

• Re-align engine and gear afterward; verify coupling face/bore readings.
  
  

• Re-torque after initial operating hours as elastomer settles.
  
  

Related MG-518 components to consider

• Overhaul Plate Kit (fresh clutches benefit from stable alignment).
  
  

• Gasket & seals if misalignment has stressed sealing lips.
  
  

• Oil strainer service following any mount/alignment work that disturbed the housing.
  
  

MG-518 Symptom-to-Parts Quick Guide

Slipping or delayed engagement → Overhaul Plate Kit, service oil strainer, verify control pressure.
Chatter/vibration on take-up or at cruise → Rubber Blocks, recheck alignment and coupling runout.
Heat and dark oil after maneuvers → Inspect clutch surfaces; install Overhaul Plate Kit and shorten first post-repair service interval.
Recurring oil residue → Reseat covers/ports with fresh gaskets/seals and verify venting.

MG-518 Selection & Commissioning Checklist

• Confirm the gear: Verify MG-518 on the data plate (model/ratio).
  
  

• Stage the job: Overhaul kit + seals + strainer supplies + mounts (if vibration noted).
  
  

• Execute: Install clutch pack to height/order spec; reseal disturbed interfaces; clean/replace strainer; refill with approved marine oil.
  
  

• Commission: Warm idle, neutral checks, light engagements both directions, short harbor trial, then post-run inspection for leaks, temperature, and vibration.
  
  

• Document: Pack height, torques, pressures, and alignment readings for future reference.
  
  

Why Buy Overhaul Plate Kits For Your Twin Disc MG-518 From Diesel Pro Power

MG-518–Specific Curation

Focused fit for your exact gear. Our listings, specs, and install pointers are written specifically for the Twin Disc MG-518, so you’re not sifting through unrelated models or guessing at pack height and plate order.

Reliability You Can Feel

We emphasize friction consistency, steel flatness/parallelism, seal-friendly alignment, and isolation durability—the small details that deliver a smooth lever feel and repeatable sea trials instead of repeat haul-outs.

Technician-First Guidance & Support

Each item follows the same practical flow—what it is, what it includes, what it fixes, and how to install—plus responsive help from specialists who work these gears daily.

Proven by Operators Worldwide

Backed by 40,000+ satisfied customers, Diesel Pro Power combines accurate parts selection with straightforward fulfillment to shrink maintenance windows and get your MG-518 back to work fast.