Cajo Fin Drive Adapter: complete compatibility and install guide

The Cajo Fin Drive Adapter accepts the Hobie MD 180, Pelican, Vibe Hero 2.0–era, and Lightning Kayaks fin drives — same adapter across every Cajo hull. The Hobie 360 doesn't fit (PA 360 integrated only). Rigid kayaks need the universal Fin Drive Mount; the Highlander inflatable line needs the Highlander Fin Drive Mount Kit bundle, which adds the rudder kit.

The Cajo Fin Drive Adapter is a passive socket that lets you drop a standard kick-up fin-style pedal drive into the Cajo drive well — on any hull in the lineup. This is the single article that covers everything: which drives fit, which don't, which SKU to buy for your boat, what's in the box, how reverse works, and how to move the adapter between boats.

Which fin drives fit

The adapter is built around the standard kick-up fin-drive footprint. Confirmed compatible:

Hobie Mirage Drive 180 (MD 180) — the kick-up fin version. The most common pairing, the one we've tested most, and our favorite combo across the lineup. Adapter holds it cleanly with no significant wobble. Reverse passes through.
Pelican fin drive — fits.
Vibe Hero 2.0–era fin drive (released roughly 2019 and newer). If your Vibe is from that era, you're good.
Lightning Kayaks fin drive — fits.

Which fin drives don't fit

Hobie 360 drive — integrated with the Pro Angler 360 hull, doesn't fit any third-party adapter we know of. The 360 has a rotating drive housing that requires a specific cutout, mast support, and steering linkage in the hull above it. The PA 360 was designed around the drive end-to-end. The PA 360 is a killer boat — it's just not a drive you can move between boats.
Old Town ePDL+ — propeller-based electric-assist drive on the Sportsman PDL line. Different mounting standard, not fin-style. Doesn't fit.

Honest hedges

Older Vibe / pre-Hero 2.0 fin drives — we haven't tested every generation. Hero 2.0 era confirmed; earlier generations depend on socket dimensions.
Hobie ePDL+ / electric-assist variants on MD 180 — Hobie's electric-assist on the MD 180 (the Mirage Eclipse / iSeries-style stuff) we haven't formally tested with the adapter. The base MD 180 kick-up fin drive is what we know works.

Which Cajo hulls accept the adapter

Every Cajo model. The same adapter socket fits the:

Outpost 100
Outpost 128
Terra 116
Highlander 100 AirTrek
Highlander 120 AirTrek
Highlander 140T AirTrek

Cajo's drive cutout dimensions are deliberately consistent across the lineup — same opening size, same threaded inserts, same bevel. One adapter, full lineup.

Which SKU to buy

This is where it gets confusing if you don't know to look. There are two SKUs on the site that contain the same adapter, bundled differently for what each hull line needs.

Fin Drive Mount (universal SKU) — adapter only

The adapter housing
Mounting hardware (machine screws + nuts)
Install instructions

Buy this if: you own a rigid Cajo (Outpost 100, Outpost 128, Terra 116). Rigid kayaks already ship with the rudder kit and steering handle in the box, so you don't need them in the adapter purchase.

Highlander Fin Drive Mount Kit — the bundle

Same Fin Drive Mount adapter as above, plus:
Traverse Fatback Rudder (blade, mounting base, hardware)
Steering handle
Foot-steering cables sized for the Highlander

Buy this if: you own a Highlander 100, 120, or 140T AirTrek inflatable and you didn't already buy the rudder kit separately. Highlanders don't ship with the rudder by default — the bundle gives you everything you need to run a fin drive on an inflatable in one box.

Don't double up: if you already bought a Cajo rudder kit for your Highlander separately, buy the universal Fin Drive Mount, not the bundle.

You own	Buy
Outpost 100, Outpost 128, or Terra 116 (rigid — rudder included with boat)	Fin Drive Mount (universal SKU)
Highlander 100, 120, or 140T AirTrek (no rudder in box)	Highlander Fin Drive Mount Kit (bundle with rudder)
Highlander + you already own the Cajo rudder kit	Fin Drive Mount (universal SKU)

Reverse capability — depends on the drive, not the adapter

The adapter is a passive socket. It doesn't add or remove capabilities — whatever the drive does, the adapter passes through.

Hobie MD 180: has built-in reverse. Flip the lever, fins switch angle, pedal backward. Works the same on a Cajo as it does on a Hobie.
Pelican / Vibe Hero 2.0 / Lightning Kayaks: reverse depends on the specific generation of the drive. Check the drive's spec sheet.
A drive without reverse: still won't have reverse when mounted in the adapter. The adapter can't add reverse to a drive that doesn't have it.

If reverse matters and you're starting from scratch, the Traverse Pedal Drive is the most direct path on a Cajo — instant reverse built in, no fin-drive ratchet to learn. Different drive type (prop, not fin), but if reverse is the feature you're shopping for, that's the call.

Per-hull install notes

Rigid hulls (Outpost 100, Outpost 128, Terra 116)

The adapter bolts directly into the drive cutout in the HDPE deck
Use the machine screws + nuts from the kit
About 20 fasteners to install — 30-minute job on a workbench
The rudder kit and steering handle are already on the boat

Highlander AirTrek inflatables

The adapter bolts to the reinforced structural plate built into the inflatable floor at the drive cutout — not into the air chamber itself. The AirTrek's drop-stitch construction has a dedicated mounting zone for the drive that's structurally separate from the inflation.
If you ordered the Highlander Fin Drive Mount Kit, the kit includes the rudder hardware sized for the inflatable's stern geometry — install that per the included instructions.
Pedaling feel is closer to the rigid line than people expect. The drop-stitch deck stays stiff enough at 10–12 psi that you're not losing power to flex.

What "fit" means here

The adapter holds the drive securely with no significant wobble. Drop the drive in, secure it with the standard cam-lock motion you'd use on a Hobie hull, and you're pedaling. No bolts on the drive itself, no shimming, no modifications.

The fin towers on a Hobie MD 180 kick up automatically when you hit shallow water or run over structure — same kick-up behavior you get on a Hobie hull, because that's a drive feature, not a hull feature.

Moving the adapter between boats

You can. About 20 machine screws to dismount the adapter from one hull and remount on another — a workbench afternoon. Most owners with multiple boats just buy one adapter per boat to skip that step. It's faster than swapping every time you want to fish a different hull.

Common cross-shop questions

"I already own a Hobie MD 180. Can I use it on a Cajo?"

Yes. Buy the Fin Drive Mount (universal SKU) for a rigid Cajo, or the Highlander Fin Drive Mount Kit for an inflatable. Drop your existing MD 180 into the adapter.

"I'm cross-shopping between the Traverse and a Hobie route."

Both work. The Traverse is the cheaper path and has instant reverse; the MD 180 + Adapter route makes sense if you already own the MD 180 or specifically prefer fin propulsion (kick-up is genuinely better in dense submerged grass and oyster). Current pricing is on each product page.

"Does the adapter let me go in reverse?"

The adapter doesn't change reverse capability — see the reverse section above. Reverse comes from the drive itself.

"Do I need a different adapter for different Cajo models?"

No. The adapter is the same physical part across the lineup. The Highlander Fin Drive Mount Kit is a bundle that adds the rudder hardware for the inflatable; the adapter inside is identical.

What the adapter does NOT change

Drive performance — whatever propulsion, reverse, and cadence the drive does on its native hull, it does the same on a Cajo. The adapter doesn't gear or boost.
Rudder behavior — fin drives don't have rudders built in; rudder steering is a separate Cajo system (included with rigid kayaks, included in the Highlander Fin Drive Mount Kit bundle).
Warranty on the drive — the drive's manufacturer warranty applies to the drive itself; the Cajo warranty applies to the adapter and the hull.