Re: 1992 V4 120 hp prop
Guessing you have a small Raker prop from your description but could be a Lightning Jr also. If you're slow out of the hole we'd guess your top rpm is fairly low. If so the motor may be a little on the low side, especially if it's not on a jakplate.
Lots of guessing without more info. Javelin is a pretty good hull and generally benifits from props with bow lift.