Seastoke
Well-Known Member
so say 10 yrs old how reliable are they how much for service charge ,spares or should you go for shafts
so say 10 yrs old how reliable are they how much for service charge ,spares or should you go for shafts
The potential for big bills exists with all drive systems.
Shaft drive - the gearboxes can die in all kinds of interesting ways. Then you have the massive metal rods that need to be exactly straight, aligned perfectly, supported by stern glands that are trying to slowly sink your boat, and cutlass bearings that need replacing. And if you run aground in shallow water, there is a good chance that the P-bracket will be driven up into the hull and quite definitely sink the boat. Add on that every time you use the boat, you are paying out because of the increased fuel bills (your props are pointing in the wrong direction).
Outdrive - My drive system of choice, but only because I have no choice. Upside is efficiency and performance. Downside is the potential for trim system problems, hydraulic steering problems, shaft seal problems, tie bar problems, and the fact that the only thing stopping the boat from sinking is a rubber gaitor. At least running aground with outdrives is usually less of a disaster.
IPS - In theory this is a good thing. It's like Outdrive Reloaded for big boats, with more of the expensive stuff inside, rather than slowly dissolving in salt water. Docking should be much easier. But you are very reliant on the electronics, motors and actuators. Shaft seals can still fail. Parts are very expensive. You are reliant on VolvoMort for replacement props, which are also expensive. And the results from running aground have been mixed, to say the least.
Everybody is looking at the cost of the machinery and service and nobody is assigning a value to the IPS chief attribute, the handling. What price is stress free docking, no arguments and yelling at the first mate no fear of new ports and no anxiety over crowded peak season waterways. Since this is a leisure activity then that has to be worth something
Much worse prospect than outdrives, as they are fully immersed, all the time. Impossible to maintain without lifting the boat. Fully electronic, 10 years old now. Better prospects out there.
I personally will never have an outdrive propelled boat, and find the issues with shafts are easily outweighed by the massive disadvantages of outdrives, and the fuel costs savings only apply if you are doing considerable hours each year.
I shall decline your invitation to get further into this never-ending story. As I said I will never own a boat with outdrives, nor IPS for that matter.What are those 'massive disadvantages'? They cost £500 for a service every other year and there's a bit more to go wrong.
Countered by better performance, more economical running, quieter (engines much further back in the hull), more space on board (engines much further back in the boat). In a sub 35ft sportscruiser they're a bit of a no brainer to be honest.
And you can add far less potential for damage if you hit something in the water (they tilt up and props protected by skeg), far easier to reach if you wrap something around the prop (just tilt them and reach them from the safety of the bathing platform).
I'm not saying that they are 'the best', and if I were buying a 40ft flybridge I'd take shafts every time.
But I think writing them off wholesale for having 'massive disadvantages' is perhaps a little hasty.