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Author Topic:   1989 Evinrude 225--SLOW
rsgwynn1 posted 08-01-2002 09:25 AM ET (US)   Profile for rsgwynn1   Send Email to rsgwynn1  
I've been having consistent problems with the SLOW kicking in after about an hour of running. The motor kicks and sputters and won't run over 2500 rpm--runs like a clock below that. So far have replaced power pack, stator, VRO pump, thermostats. Everything else (carbs, coils) checks out. Last time out, after running 30 miles and then stopping for an hour or so, I got a beep-beep-beep-beeeeeeeeeeep whenever I hammered down, full acceleration, then shut down to 2500. Mechanic (longtime friend and OMC junkie) is now checking out some kind of vacuum lock in the VRO system, but I'm still not sure, as is he. What else could be going wrong here? No fun coming in from 25 mi. offshore at 10 kts. I'm baffled.
Peter posted 08-01-2002 01:23 PM ET (US)     Profile for Peter  Send Email to Peter     
A friend had the same engine and it turned out to be an obstruction in one of the cooling passages.
shoctor posted 08-01-2002 01:26 PM ET (US)     Profile for shoctor  Send Email to shoctor     
Had the almost same problem on my uncles (Grady far less superior machine) if it is an audible beep it could be the overheating warning system with the throttle restrictor kicking in. While we di d the same that you did replacing everything but the kitchen sink. Turned out the head was clogged and at low speeds the sediment would not get kicked up once start to rev the engine it started to clog. Try taking the lower unit off and reverse flush the motor. We did and cleared the problem.
rsgwynn1 posted 08-01-2002 05:21 PM ET (US)     Profile for rsgwynn1  Send Email to rsgwynn1     
I pulled the heads awhile back and cleaned out all of the gunk in the water passages. I get good water flow and no overheating on the temp gauge. The warning signal seems to indicate low oil/no oil. Otherwise it would be a continuous beeeeeeeep for overheating. Besides, it started last time after the engine had cooled for over an hour. More mystery.
rsgwynn1 posted 08-02-2002 05:44 PM ET (US)     Profile for rsgwynn1  Send Email to rsgwynn1     
Mechanic bypassed Fram paper-element fuel filter and it ran fine. Replaced it with an OMC fuel/water separator. Thanks to all for the posts.
rsgwynn1 posted 08-05-2002 11:22 AM ET (US)     Profile for rsgwynn1  Send Email to rsgwynn1     
Same ol', same ol'--ran fine on Sunday for an hour then cratered at WOT. I guess the next step is to check the fuel pickup and check valve at the tank. I'm flummoxed.
jstachowiak posted 08-05-2002 11:36 AM ET (US)     Profile for jstachowiak  Send Email to jstachowiak     
Try the forums at and/or the "boating forums" tab at These guys seem to know a lot about outboards. Not to knock this site, but short of taking in to a mechanic (which is a whole nother subject) these forums have more expert advice on outboards, I have found.

Like this forum go thru the topics and see if you can find a similar problem.

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