Tanglerat , had to see this before I head off here - you got me curious , thought your text was having a laff !!
Here goes - JD save yourself a few hundred quid - hire a diving suit and hop into the harbour at Port Na Blagh - brand new , never used Minn Kota Riptide 70lb awaits rescue !
Due to excess alcohol the previous night , and a severly hungover/still drunk deckhand, the engine was not raised out of the water and when I gave the main engine throttle it was ripped off the transom. Costly lesson learned - no liquor the night before, and don't put a hungover brother in charge off the aux !!
Back to the question , the 70lb thrust Minn Kota works as well as the wee 4hp mariner on Lough Muckno. Get a Minn Kota Riptide though - they cost a few quid more but are made for salt water. And if any one calls them egg beaters - give them a 2 fingered salute !