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#1
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What are those little holes......
What are those little holes in the back of outboards below the power head section in the down shaft section used for. I hope I explained where I am talking about. They seem to let out exhaust, steam and water. Why are they there, what are they called and are they (one or both ) suppose to let water out. I have been noticing it when I run my motor on the muffs and cant find the answers I am looking for.
I dont have a picture of them, so if you know what I am talking about and have a picture would you post it please. thanks, turbo
__________________
1984 V-20 Center Console 1985 90 hp Merc. American by birth, Southern by the grace of GOD. Never let your hobby become a job but rather let you job become your hobby. http://www.wellcraftv20.com/gallery/turbine_doc_84_cc 
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#2
03-20-2008, 11:37 PM
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I found some pictures in the gallery that show the hole sI am talking about. I borrowed from someone else.
http://www.wellcraftv20.com/gallery/...0005.sized.jpg http://www.wellcraftv20.com/gallery/.../afterrear.jpg http://www.wellcraftv20.com/gallery/...llcraft_12.jpg
__________________
1984 V-20 Center Console 1985 90 hp Merc. American by birth, Southern by the grace of GOD. Never let your hobby become a job but rather let you job become your hobby. http://www.wellcraftv20.com/gallery/turbine_doc_84_cc
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#3
03-21-2008, 12:12 AM
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they are High RPM water bypass holes when you are running above 2500 to 3000 RPM's they pump the extra water out there to keep the power head from over heating. the exhaust and prop can't let out as much water as the water pump can put in at high rpms.
__________________
 1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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#4
03-21-2008, 03:19 AM
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Is or should there be water comming out of both? I noticed mine only lets water out the starbord side when on the muffs. It seems to let some out at lower RPM's, but more like you said at higher RPM's.
Thanks for shedding some light on this for me.
__________________
1984 V-20 Center Console 1985 90 hp Merc. American by birth, Southern by the grace of GOD. Never let your hobby become a job but rather let you job become your hobby. http://www.wellcraftv20.com/gallery/turbine_doc_84_cc
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#5
03-21-2008, 03:48 AM
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I wouldn't be too concerned about when on the muffs. You can't deliver the same water volume from a garden hose that you do when the boat is in the water. That's why you shouldn't over rev your motor when on the muffs.
I had a 225 Evinrude on my Grady mounted on a bracket. I believe that the factory mounted the bracket a bit too low. Those exhaust ports were under water with the motor down and the motor didn't like to idle very long without dieing out unless I tilted the motor just enough for them to clear the water line. Then it idled fine. On a side note, I forgot how clean my Yamaha was. 
__________________
Heavily medicated for your protection.
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#6
03-21-2008, 06:56 AM
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They are also an exhaust port. At idle most of your exhaust comes out of those holes. I've seen some Merc's tricked out with an almost "dry" exhaust using those holes. Makes 'em loud as hell.
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Captain Jon
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#7
03-21-2008, 10:11 AM
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Quote:
I wish I had been in the market when you sold it. Anyway, just thought I'd mention it.
__________________
 1990 Hydrasports 2000cc Vector with 96 200HP Oceanrunner. Saved by grace alone, through faith alone, in Christ alone http://www.providencerpchurch.com/
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