Mast not plumb

[penfold]

A 10mm lateral displacement will make no difference at all unless the masthole in the deck is tighter than any I've ever seen; they generally have ~25mm clearance all round taken up with either wooden wedges or modern flexible chocking compounds.

 

[David_cepi]

Thanks for all replies, i am happy to share some photos and maybe this could also help others.

 

[Refueler]

Of course a mount should be as accurately placed as humanly possible. Every error adds up .. so its not a matter of that's good enough.

BUT ... what about the boat itself ? Imagine there's you ... couple sailing with you ... fuel tank part empty .. FW tank ?? The boat is most likely not floating dead level ... whether alongside or sailing. The boat if anything like mine - will be different everytime she goes out .... in fact mine has a normal very slight stbd list from the very first day she launched in 1973 due to the cabin and service tanks layout. That is before we take into account waters movements.
Saying that - if 10mm is the only error .. that mast stays etc. are all set well. What is there to worry about ??

 

[geem]

A spirit level is about as much use on a boat as an umbrella or a naval officer; check the plumbness of your mast using a halliard, or if you have stretchy braid halliards a length of thin dyneema cord, or measuring directly at the mast foot with a caliper or rule from known datums. Your mast foot must be very unusual, there is usually no means of stepping a mast off the centre line laterally, although fore and aft adjustment may be done on more sporty numbers.

It was really handy when we were doing our poured epoxy galley and heads works surfaces ?