XTB 21 with a 250 XS Optimax

[Del Allison]

Does this work? I know the XTB is rated to only about 150-200 hp, but I want to amp the XTB up. If I put the 250 XS on there, I would anticipate the weight in the stern to be too much (1 starter battery, 2 trolling battery, gas tank, and oil tank and a 500 lb engine). Has anyone done something similar? I just don't want to get swamped on takeoff, deceleration or 1 foot rollers. Also, if the butt is too heavy, couldn't I just move the 2 trolling motor batteries up to the bow compartment? That would be about 200+ lbs of weight transferrence (100 pounds off the stern, and the same 100 lbs now added to the bow). Any input would be great.

 

[Darth VMAX]

Yes, There have been 3.0L Opti's riged on the XTB's. I am sure the standard of load shift and bringing the set-back in would still apply. Before going to a Bullet we had a member here that had a 250xs on his XTB-21 and he liked it alot.

 

[john w]

I would put the starter battery up in the front, sounds like it would be a great combo.

 

[PROXTB]

I have an 89' XTB and the previous owner had a 250XS on it and he said the boat perfromed fine. 10" set back with floatation in the jackplate cavity. He ran a 28" modified Bravo in the low 90's.Three trolling batteries in the back with a three bank charger. The trolling motor is a 109lb thrust MG.
I presently have a 225 PM and I am looking to upgrade HP here in the near future. I should just leave it alone but the boat is slow compared to what I am used to, So I am thinking of going to an 2003. My two cents

 

[aaronmt]

The xtb is not slow in any strecth of the word.If they had made different caps on that hull id be a allison onwer still.The extra foot is huge in bigger water and is 3 liter friendly.From what Bill says its quicker on plane the most of them.I wouldn't doubt that at all eaither.I ran Octanes 89 xtb with a bone stock 94 150promax to 84.7.I actualy think there is a bit more left if there had been more water to run in.That's about the fastest 21ft boat with a 16yr old 150 hangin on the back I've seen.