Merc 90HP 1990 Loosing Power after 1 min

SpyderMan

Recruit
Joined
Mar 10, 2004
Messages
2
Hi, <br /><br />I have a problem with my Mercury Outboard 90hp 1990 model Sn B-240451 3 Cyl.<br />My boat sank some time back, got it out serviced and repaired. <br />I have it running but the problem as follows :<br />Starts well, idles well, when I rev up runs great but after about a minute of running at full throttle it starts loosing power, after that I can only idle. If I leave it for a day it happens all over again.<br />Checked the following :<br />All 3 carbs have fuel, even right after the problem happens.<br />Spark plugs new.<br />Someone told me that it could be an oil problem, but beeper does not sound.<br /><br />Any ideas anyone
 

Clams Canino

Commander
Joined
Jan 10, 2004
Messages
2,179
Re: Merc 90HP 1990 Loosing Power after 1 min

Intermiitant high speed winding in stator is my guess. Or bad connection for same.<br /><br />2nd guess - thermal intermittant in switchbox.<br /><br />-W
 

SpyderMan

Recruit
Joined
Mar 10, 2004
Messages
2
Re: Merc 90HP 1990 Loosing Power after 1 min

Forgot to mention a couple of things.<br /><br />1) It sank in salt water<br />2) When I press the choke (Electronic) it revs up again.
 
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