
The CAT 174-5517 is a genuine Marine Engine Mounts, Pair (3412E / C18 / C30 / C32). G Service Power has this unit new surplus, unused, in stock in the UK at £495, ready for next-day worldwide dispatch. Call +44 7951 632187.

Actual unit photographs. Further photos and video on request.
| Part number (MPN) | 174-5517 |
|---|---|
| Manufacturer | CAT |
| Product | Marine Engine Mounts, Pair (3412E / C18 / C30 / C32) |
| Barry Controls number | 27681-5 (mount label); 27681-5/01 (Cat box label) |
| Cat description | MOUNT AS-ENGINE |
| Mounting group | 174-9897 flexible engine mounting (2 x 174-5517 + 2 x 174-5516) |
| Companion mount | 174-5516 (not included) |
| Engine model | Cat C18 · 3412E · C30 · C32 marine; C18 genset (per parts.cat.com) |
| Quantity | 2 mounts — sold as a pair |
| Construction | Cast aluminium base, twin rubber isolators, two levelling studs |
| Box | Cat box, Barry Controls label, serial 980039005, Sep 2007, made in USA |
| Condition | New surplus — unused, boxed, with Barry instruction sheet |
| Location | UK — ready to ship worldwide |
| Condition | New surplus |
| Availability | In stock — next-day worldwide dispatch |
| Price | £495 ex works UK, excl. VAT |
| Reference | GX-174-5517 |
The CAT 174-5517 fits CAT C18, 3412E, C30 and C32. Related part numbers: 1745517 (alternate part number, CAT), 27681-5 (maker's own number, Barry Controls), 174-5516 (kit component, CAT), 174-9897 (related part (same system), CAT), 241-3779 (related part (same system), CAT) and 140-3592 (related part (same system), CAT).
| Make | Model | Notes |
|---|---|---|
| CAT | C18 | marine engine; also C18 generator set and petroleum package (parts.cat.com) |
| CAT | 3412E | marine engine (parts.cat.com) |
| CAT | C30 | marine engine (parts.cat.com) |
| CAT | C32 | marine engine (parts.cat.com) |
| Part number | Brand | Relation | Notes |
|---|---|---|---|
| 1745517 | CAT | Alternate part number | same number without the hyphen |
| 27681-5 | Barry Controls | Maker's own number | Barry number on the mount label; box label reads 27681-5/01. Barry publishes no spec for the 27681 series |
| 174-5516 | CAT | Kit component | companion 1-14 in flexible engine mount, identical Cat fitment list; two of each per engine (not included) |
| 174-9897 | CAT | Related part (same system) | MOUNTING GP-ENGINE FLEXIBLE group for the 3412E marine that this mount belongs to |
| 241-3779 | CAT | Related part (same system) | the other C18 / C12.9 marine flexible mount (Barry 27458-10) — a different arrangement, not interchangeable |
| 140-3592 | CAT | Related part (same system) | 3406E / C15 marine mount (Barry 27458-6) — not this part |
Fits the C18 / 3412E / C30 / C32 marine arrangement that pairs 174-5517 with 174-5516 — not the 241-3779 C18 arrangement or the 140-3592 mount for the 3406E / C15. Check your engine serial number on parts.cat.com before ordering. Fitment and interchange data is compiled from manufacturer catalogues and cross-reference listings and can change at engine serial-number breaks. Quote your engine serial number and existing part number when you call and we will confirm before dispatch.
The CAT Marine Engine Mounts, Pair (3412E / C18 / C30 / C32) — part number 174-5517 is a genuine CAT part, supplied at £495 by G Service Power. It is new surplus, held in UK stock and dispatched next day, worldwide.
Pair of genuine Caterpillar 174-5517 flexible marine engine mounts, made for Cat by Barry Controls as part 27681-5 — each cast aluminium base carries the CAT 174-5517 / Barry Controls 27681-5 label, and the Cat box label reads 174-5517, quantity 2, Barry P/N 27681-5/01, September 2007, shipped to Caterpillar's Griffin logistics centre (see photos). Resilient mounts carry the engine on the bed or stringers and isolate its vibration and noise from the hull; worn, cracked or oil-softened rubber lets the engine move, disturbs shaft alignment and passes vibration into the boat, so mounts are a routine renewal at repower or major overhaul. Each mount has twin rubber isolators and two threaded levelling studs with adjusting nut, jam nut, washers and top nut, so engine height and alignment are set without shims. Cat's parts catalogue lists 174-5517 (Flexible Engine Mount) for the C18, 3412E, C30 and C32 marine engines and the C18 genset, paired with the companion 174-5516 mount, two of each per engine; the 174-5516 mounts are not included. It is not the mount for the 3196, C7, C9 or C12, nor the C18's other 241-3779 arrangement. Condition: new surplus — unused in the original 2007 Cat box with the Barry Marine Mounts instruction sheet; small storage marks on the castings. Price £495 for the pair. Please confirm against your engine serial number or existing mount numbers before ordering. In UK stock — call +44 7951 632187 or message on WhatsApp for shipping and availability.
Compatibility: fits CAT C18, 3412E, C30 and C32 — the full list of engines and interchangeable part numbers is on the Compatibility tab. Confirm against your engine serial number before ordering, or call us and we will check it with you.
For sale from UK stock. Quote any of these references when you call.
| Part number | 174-5517 — also listed as 1745517, Caterpillar 174-5517, Barry Controls 174-5517 |
|---|---|
| Brand | CAT (also Caterpillar) — also sold under Barry Controls |
| Barry Controls number | CAT 27681-5 |