buy a 2" ball just to be safe...you wouldn't want your trailer/boat to bounce up off the hitch going over a big bump in the road. tongue/ball should be the same.
Dealer said it was ok to tow? Doesnt sound good to me.
despite the fact you aren't 'supposed' to, there are probably many thousands of mismatched trailers that see the road daily. Keep in mind it is entirely possible to have a well adjusted 2 inch coupler on a 1 7/8 ball remain on there for years, whereas a loosely adjusted matching coupler could come off with a decent bump.
If it is a relatively light boat and you aren't doing alot of trailering, it is fine. (pulling a 2000 pound boat 3 miles to your house, perfectly fine if the coupler is tight on the ball)
despite the fact you aren't 'supposed' to, there are probably many thousands of mismatched trailers that see the road daily. Keep in mind it is entirely possible to have a well adjusted 2 inch coupler on a 1 7/8 ball remain on there for years, whereas a loosely adjusted matching coupler could come off with a decent bump.
If it is a relatively light boat and you aren't doing alot of trailering, it is fine. (pulling a 2000 pound boat 3 miles to your house, perfectly fine if the coupler is tight on the ball)
took a picture of a tongue on one of our trailer, and it says-
"1 7/8 or 2 inch ball"
will post pic when wife gets home
rob