I just made a hole thru my transom (water pick up for AC) and the thru hull fitting is the same length (2 1/2) as the transom is thick.
I`ve looked but can`t find a thru hull fitting with a pipe thread thats longer that

The thru hull is too short and need screw right into the valve






EDIT:

I think this should do it:


http://www.ebay.com/itm/160793900438...#ht_540wt_1111

If you put the thru hull through the transom you won't be able to get water while on plane (maybe you only need it while your on anchor or at the dock?).

going to need to to put a bleed valve on the water line inside where you can get to it easily, as you are going to have to bleed it everytime after running the boat..

I used a scoop type pick up on the bottom to keep it primed. The previous straight fitting would loose its prime after running fast.

Why not get a stainless through-transom pickup that is adjustable, and will pick up at speed too? Check out the offerings from CP, Eddie Marine or Teague. Ive spent money at them all...

Read his type of boat in his signature... no gen... will only run on shore power at the dock...

As long as his pump is higher than his intake he will be fine.

Not necessarily.

Those pumps aren't usually self-priming.



MC

. Occasionally mine will get air locked from having it up on the lift. A few minutes of driving it around to burp the air out and it works fine..

Exactly! My pump is located below the water line and it still will not self prime after it has been on the lift. Installing the scoop pick up automatically primes the system. The thru hull in the transom is going to be a constant pain.