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Frank Frank is offline
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First recorded activity by BoatBanter: Mar 2007
Posts: 6
Default Outboard engine cooling system question

On Mar 18, 9:14*am, (Richard Casady)
wrote:
On Sun, 16 Mar 2008 15:19:08 -0500, wrote:
I made sure the water level in the barrel was well
above the water intake.


Make sure it's higher than the impeller. There's no mark on the
outside of your lower unit indicating where it is, you'll just have to
estimate. But some impellers won't suck up water if they're above
water level.
Second thing, remove the thermostat. It might be stuck closed.


I don't believe in coincidence. The thermostat wouldn't stick closed
at the exact time you dropped it over the side.

won't hurt to run the engine without it. If that's the problem, you
can replace it later.


Casady



I took the powerhead off the Merc 3.3hp engine tonight and followed
the entire cooling system throughout, checking for any blockages.
There was none. I also discovered there is no thermostat on the 3.3
hp. I didn't think there was, but I'm a rookie with engine repair so I
wasn't sure.
When I opened up the powerhead I found plenty of fresh water still
not dried out. Indicating to me that the powerhead was getting cooling
water but for some reason it just wasn't coming out the water pump
indicator hole. Which I did clear out with wire when I was trying to
run the engine in my back yard. Everyones suggestions on these posting
I did check out. Still nothing. This is the damnedest thing.