This was easy. Replaced the slot head plug in the head right behind the thermostat with a hose barb (1/4" npt to 1/4" hose). Then connected 1/4" id gas line and routed it down and out a 1/2" hole drilled in the lower case. Two tie wraps attach the hose to the motor.

Took 3 inches of 1/4" copper tube and bent it to about 90*. This lets the direction of the water be adjusted to where it can be seen best from the helm.

Hooked up the water muffs and fired up the Force. Nice stream at idle. Took the boat over to a local lake for a test run. The tell tale was very easy to see at a glance from the helm. At WOT the water shot back about 8 feet!