For through-transom bolted engine installations
As two stroke outboard motors become rarer and new heavier four stroke outboard engines take their place, many owners of 8hp engines and above sensibly choose to bolt the engine through the transom in a semi-permanent installation to protect from outboard motor theft.
Tried and tested
Our tried and tested bolt locks are intended for use with through-bolts that are coach, countersunk or stepped so that, should a thief attack the head of the bolt and remove it, they will be unable to hammer the bolt shank through the existing hole.
We manufacture two bolt-lock models for through-transom bolted outboard engines. Each has a 13mm diameter hole in the body unit. A stainless steel reducing bush is available to reduce the hole to 10mm.
Pacific Bolt LockThe Pacific Bolt Lock is our original insurance approved lock that now uses the same high security locking head as the Volcano (see below). The Pacific Bolt Lock represents excellent value for money as well as security. A black plastic cover is supplied. For engines: |
Price: $94.95Delivery $14.50. Priority Mail postage (S&H) |
The VolcanoThe insurance approved Volcano Bolt Lock represents the pinnacle of OML's bolt lock development. It is now regarded by many in the industry as the best bolt lock on the market as it has been designed and built to resist removal by the most robust actions. |
Price: $104.95Delivery $14.50. Priority Mail postage (S&H) |
The Volcano Twin pack keyed alike
|
Price: $199.95Delivery $14.50. Priority Mail postage (S&H) |

Small Slot Lock
We make five models of insurance approved slot lock because our extensive research and development has shown the importance of having the correct size of lock for the outboard motor you have. The Small Slot Lock is designed specifically for Honda and Suzuki 2-3hp.

Atlantic Slot Lock
The Atlantic Slot Lock is our most substantial insurance approved outboard motor lock and is made in four lengths: 170mm, 195mm, 230mm and 260mm; each with a 14mm slot. A high security locking head (HSH) is supplied as is a black dust cap and a rubber liner.

Pacific Bolt Lock
The Pacific Bolt Lock is our original insurance approved lock that now uses the same high security locking head as the Volcano. The Pacific Bolt Lock represents excellent value for money as well as unparalleled security. A black plastic cover is supplied.

The Volcano
The Volcano Bolt Lock represents the pinnacle of OML’s insurance approved bolt lock development. It is now regarded by many in the industry as the best bolt lock on the market as it has been designed and built to resist removal by the most robust actions.