paulswagelock
Well-Known Member
All last season my speedometer was very sluggish to repond. It lagged the actual speed on the way up, and was slow to return to zero when stopped.
So over the winter I did the drill bit clean out in the lower unit leading edge pitot hole, nothing. I removed the tube from the top of the lower unit and used compressed air to blow back through the lower unit - air flowed freely out the pitot hole. Yesterday I splashed and went for a quick ride - problem still exists.
I have the Mercruiser Smartcraft gauges, so I do not think the actual air line runs to the speedometer, I assume there is a pressure sensor somewhere in the engine bay? Any one know what happens to the air tube that comes in through the lower unit once inside? I want to find it and use compressed air reversed to try to blow out something that must have made its way up through the sensing line somewhere above the lower unit.
Thoughts, recommendations?
So over the winter I did the drill bit clean out in the lower unit leading edge pitot hole, nothing. I removed the tube from the top of the lower unit and used compressed air to blow back through the lower unit - air flowed freely out the pitot hole. Yesterday I splashed and went for a quick ride - problem still exists.
I have the Mercruiser Smartcraft gauges, so I do not think the actual air line runs to the speedometer, I assume there is a pressure sensor somewhere in the engine bay? Any one know what happens to the air tube that comes in through the lower unit once inside? I want to find it and use compressed air reversed to try to blow out something that must have made its way up through the sensing line somewhere above the lower unit.
Thoughts, recommendations?