Wow... thank you so much guys - so much information!! Will definitely get working on that little old and simple 4hp and will be careful not to loose the pin !!
Silly question..., everyone is telling me to "change the impeller"... just wondering, other than preventative maintenance..., is there a reason why I must assume the impeller is bad ? (since there is water coming out of those 8 holes in the leg). Just a question...
changing the impeller is routine maintenance on any OB and unless you know who put it in and when theimpeller should be replaced.
not because it is currently bad but because it will turn bad at an unknown date in the future and odds are your engine will fry before you can even realize it .
all you need is one fin to break off and get inside the PH internal passages to stop cooling water .
the cost is minimal like a tylenol...and will save you big headaches down the road
if you use the engine much change it every 3-5 years minimum... just in case.
if you don't use it much... change it anyway every 3-5 years minimum... just in case.