What size and position for auxillery outboard motor

[MogM]

I am totally new to boating and wishing to buy my first boat. Cabin cruiser of approx 30ft. I am looking at Seamaster 30’s or similar with centre cockpit and aft cabin. Weight approx 5000Kgs. Ideally I would like one with twin inboard engines but most I see have a single.. So my questions are.

1)What size of outboard engine would I need as an auxillery (JIC) and to perhaps assist main engine in the event of losing headway against a strong tide or wind

2)Would it have to be mounted on the stern off centre to avoid the single prop and rudder of the inboard engine.

3) If the answer to above is `yes` will that affect the way the boat steers and handles, particularly at slow speeds when accessing and leaving tight berths or locks

4) Because of the aft cabin effectively being in the way, is it likely that I will have to have control cables custom made to reach the centre cockpit helm position or are there already cables etc available `off the shelf` for such situations

Answers, comments and any further observations around this subject will be appreciated.

Thanks

Mog

 

[moonraker 36]

most seamaster 30 around here are twin diesel's,infact one has just sold on the same boatyard as me(with twin)usally the 8meter (slopping front) that are single engined.
back up engine for a 30'footer going 10hp plus,its how much wieght the mounting bracket will hold that limits the size of outboard.

 

[whisper]

I am totally new to boating and wishing to buy my first boat. Cabin cruiser of approx 30ft. I am looking at Seamaster 30’s or similar with centre cockpit and aft cabin. Weight approx 5000Kgs. Ideally I would like one with twin inboard engines but most I see have a single.. So my questions are.

1)What size of outboard engine would I need as an auxillery (JIC) and to perhaps assist main engine in the event of losing headway against a strong tide or wind

2)Would it have to be mounted on the stern off centre to avoid the single prop and rudder of the inboard engine.

3) If the answer to above is `yes` will that affect the way the boat steers and handles, particularly at slow speeds when accessing and leaving tight berths or locks

4) Because of the aft cabin effectively being in the way, is it likely that I will have to have control cables custom made to reach the centre cockpit helm position or are there already cables etc available `off the shelf` for such situations

Answers, comments and any further observations around this subject will be appreciated.

Thanks

Mog

Have you looked at www.seamasterclub.org ?
Neither of the single engined models have an auxilliary outboard. If you are going on the sea in a boat of that age I think I'd prefer the twin engined versions.

 

[moonraker 36]

boatshop24 have at least 5-seamaster 30 for sale with twin diesel's.
some thornycroft,some 4107/8 perkin's...