water pressure gauge on an I/O ?

Q

quickfamily

Recruit
Joined
Aug 6, 2003
Messages
2
Hi,<br /><br />New to boating and spent a bit of time reading through this forum. Sounds like the failure of an impeller can cause major damage to the engine. Seems to me that a water temperature gauge is not the answer because if the impeller fails there is no water and so no reading on the temp gauge. (I've seen this happen on a car). Seems more logical to have a water pressure gauge so if the impeller fails you will see instantly. However, searched the web and they only seem to sell outboard water pressure gauges, not I/O.<br /><br />By the way my boat is FWC so I'm thinking that the water temperature is probably the fresh water and not the raw water in which case if the impeller fails you will still see the temperature go up. If that is the case I'm still interested to hear if a raw water pressure sensor is ever used.<br /><br />Thanks<br /><br />Andy
 
L

Lark40

Senior Chief Petty Officer
Joined
Oct 29, 2001
Messages
793
Re: water pressure gauge on an I/O ?

The temp sensor would be on the block, which would be FWC in your case, just like a car. Think about it...have you ever seen a water pressure gauge on a car?
 
S

Skinsk

Petty Officer 2nd Class
Joined
Aug 31, 2003
Messages
128
Re: water pressure gauge on an I/O ?

Just change your impeller every season or two, never run the motor dry, and you will probably never have an impeller failure. Just don't suck up any plasic bags, or do any lower unit dredging.<br /><br />Scott.
 
D

Destin

Seaman
Joined
May 11, 2003
Messages
56
Re: water pressure gauge on an I/O ?

I don't think a water pressure gage will tell you anything on an I/O. I believe you will get 1 to 3 PSI max. There is a slight water restriction in the outlets to the exhaust manifolds and risers to make sure the block has been filled first, and then all excess water flows continuously thru the exhaust system to keep them as cool as possible.
 
Dunaruna

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: water pressure gauge on an I/O ?

I've fitted a 'T' piece with a tap on the exit hose just before the exhaust manifold, it runs to its own thru hull. Before each outing, as the motor is warming up, I open the tap for a few seconds. If water exits out the thruhull then the pump is o/k. Only takes a couple of seconds for piece of mind. Easy & cheap. If you suspect weed or sand intrusion, open tap momentarily to test pump. Aldo
 
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