bc's xtb21
Active Member
I have a xtb21 with an old vertical 175 2.4 merc. I have already done a few mods to this engine lwp, ex.tuner. It runs decent but I would like to find a 2.4 or 2.5 powerhead to build over the winter,already have a set of wh-20 carbs and velocity stacks plus 3 petal fiber reeds I bought off Tooter. Any suggestions as to what mods could be made, would like to end up in the 240-280hp range. Guess what I am asking is what would be the best block/reed configuration to start with. As always thank for the info!