I also own a 2007 170 CC
The Baitwell pump is located under the transom well under the circular hatch plate in splashwell. If looking straight down thru the access plate, the pump and seacock is located to the left of the divider in the bilge.
on the 2007 model, the baitwell/pump pickup is located under the boat, directly under the support bunk (when looking at the transom, right bunk). Triumph moved the pickup from the transom to underneath the boat for better suction and low-speed pumping, a problem with earlier models.
I found using a $2 manual "kerosene" pump makes thing real easy to winterize the baitwell. Found at Lowes.
to winterize:
Elevate boat (bow) as high as possible to help gravity flow
open seacock
unscrew sprayhead in baitwell
toggel baitwell pump on/off quickly to break any airlock
put bucket under pickup
pull drain in baitwell
pump antifreeze thru sparay head fitting in foward bait well using kerosene pump. Make sure pump "nozzle" is past "cutout" in sprayhead fitting so anti-freeze flows down sprayhead fitting and hose.
Should take only 1/3 (if that...) of anti-freeze, anti-freeze should trickle out of pickup hole in bottom of boat into bucket
Close seacock
Pump a little more antifreeze in to be safe..
Pour some anti-freeze down baitwell drain until tickles out of boat thru drain in transom.
If no anti-freeze out of pickup occurs, you still have an air lock somewhere (or water in low point of hose between pump and baitwell). Raising boat with seacock open should solve this...
See rest of my winterization tips on this forum.
NOTE: be real curious how YOUR pickup/thru-hull fitting looks like. Mine is ripping the trailer bunk carpet and being deformed (the circular part of the fitting on the outside of the hull).. the caulking "looks" to be twisted and pulled toward the transom. Its hard to see with boat on bunk. If your eye is level with bunk, you can barley see the thru-hull fitting (the bunk/carpet is routered a little lower than the rest of the bunk to pass the thru-hull, but the factory on my boat didn't "router down" enough???)
I plan to hosit to boat off the trailer to "inspect" this fitting. Pictures comming soon.
Still the best **** little boat I ever owned...
