Previous owner of my 2600 firehawk cat has a -2 shortie with a 1 1/2" spacer Doesnt that defeat the purpose of the -2". If I dont use the spacer would I have a problem getting on plane and i"m guessing i would need a new coupler if i dont use spacer any help would be great thanks

Yep, only gives you a 1/2 inch of rise on the prop. Eliminating the spacer could make it hard to get on plane and cause high prop slip numbers. It just depends on how dialed in it was before. You would need new studs and a stock upper to lower coupler to eliminate it.

thanks for the good info Griff, didnt think about the stud lengths