I had a chat with the workshop today and they advised my old Mariner 75 is going to need a re-bore if it is to be of any reliable use and at just under 30 years old, I'm not sure its worth it. So I find myself looking for a replacement engine.
The old Mariner ran ok, till it died, but was smokey, smelly and thirsty and I fancy something a lot newer, cleaner, quieter and more economical, oh and bigger
I've looked at the second hand market and can't justify the cost for an engine of the right age with potentially unknown issues, when new ones are not that much more, so I'm thinking new is the way forward.
The issue I have is that the boat is old and although rated to 120hp, has no max transom load on it. As engines have got a lot heavier, I have no idea what is safe to hang on the back, particularly as I have a 25kg aux on there too. The best guess I have is the mariner 115 of that era was about 160kg. I can't find a contact for Zodiac either to ask them for advice, as they direct you to the dealer network.
I use the boat as a family toy, fishing boat and heavily loaded dive boat. The 75 was quick with just me in but struggled with divers. I'd like to go with a bigger engine but that puts the weight up even more. I also suspect 115hp might be a bit too much for the hull. To complicate it further, I'm planning on replacing the hull in a few years with something like an XS545 or 585. The 545 has a max hp of 100, which would suit the current hull, but means 4 stroke and heavier (honda 100 is 163kg). A 90 would be fine for the 530 and the 545, but possibly too small for a 585, although much lighter (90TLDi is 143kg)
So, after all that, what engines do any of you other 530 owners have? How do they handle (top speed, chine walking, quick on the plane etc.)?
Any thoughts on what weight I can safely hang on the back?
And finally, any thought on how well an XS 585 or similar would go on a 90 or 100 motor?
Based on weights, price, local dealers etc, if I go 90hp, then its the TLDi, 100 is probably the new honda (expensive but quite light and very nice!) and 115 would probably be an Opti or TLDI.