Here's the version I've been singing, with some additional verses that I cobbled together:

Traditional
Adapted with some new verses by Charlie Ipcar © 2002
Key: F (5/C)
Running Down to Cuba


C-------------------------------------G-C
Runnin’ down to Cuba for a load of sugar,
G--------------------C
'Way, me boys, for Cuba!
-------------------------------G----C
Sheet ’er home, you Down-east farmer,
---------------------G-C
Runnin’ down to Cu-ba!

G--------------------C
'Way, me boys, for Cuba!
-------------------------------G----C
Sheet ’er home, you Down-east farmer,
--------------------G--C
Runnin’ down to Cu-ba!

Runnin’ down to Cuba with a press of sail…
Flingin’ the water right over the rail...

Runnin’ down to Cuba, she’s sailin’ fine…
Loaded down with Northern pine…

Santiago, we’ll see once more…
Spend all our money when we go ashore…

We’ll drink rum an’ we’ll eat mango…
Find some pretty girls who dance Fandango…

Load ’er down with sugar an’ rum…
Run ’er back North ’fore winter come…

Cheerily,
Charlie Ipcar