I have a 1994 Johnson 115 HP.<br /><br />I have read on this forum about installing a water pressure gauge. Sure sounds like a good idea. I am having the water pump impeller replaced this week (kit) just for the hell of it as it hasn't been done in 2 years. Sure would like to get an indication as to when it's needed as opposed to just doing it blind.<br /><br />In any event, can someone point me to instructions as to how to install such a gauge.<br /><br />Thanks,<br /><br />Mirko