How do you say "a lot of the ropes"?
Quiero decir "We had to change the mast and replace a lot of the ropes".
¿Como se dice "A lot of the ropes"?
¿"Muchas de las cuerdas", o "Muchas cuerdas"?
muchas de las cuerdas.
replace a lot of the ropes
Your nautical friends would probably take exception to your use of "ropes". In a nautical context, "lines", "sheets", "halyards" would be much better.(I have no idea how to make these distinctions in Spanish but I suspect that Spanish speaking seafarers have their own specialized vocabulary.)