Pitot Tube Location

[Craig P]

Can anyone identify which hole in the lower unit is used to operate the speedometer on my '86 ProV 150? Thanks

[jb123]

it would be on the leading edge of the lower unit, about halfway up from bottom to cav platemaybe 5 inches. its a stainless tube bout 1/8 " and clog much....i use pitot tubes off transom.

[Craig P]

jb123,

Thanks for the quick response. Five inches below the cav plate and approx. 4 1/2" inches back from the leading edge, there's a hole that has a channel about 1/8" wide, (in front of the hole). Should there be a stainless tube inserted in this channel/hole? Thanks again.

[jb123]

ive an 89 pro v but i forget if the older models have them...THINK they do....but it WILL be in the leading edge.