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Author Topic:   warning sound and them I lost power
Marco Whalo posted 07-29-2001 07:58 PM ET (US)   Profile for Marco Whalo   Send Email to Marco Whalo  
This week I was out and had my 1990 150GT 150HP Johnson opened up to full throttle (5400 RPMs)for about one minute and a warning (continuous) beep came on and shut down the engine to 2500 RPMs. I didn't like the sound of the warning so I shut her down completely and started the kicker and headed back. I turned the ignition switch on a few minute later and heard the same sound. About 30 minute later I was back at the marina and I turned on the ignition switch and didn't hear the warning sound. The *confidence* stream of water coming from the boat was strong at high and low RPMs. I have a VRO and crossflow fuel system and do not mix my fuel. I had plenty of oil in the oil tank. I also have the S.L.O.W. engine warning system. Not sure what that stands for.

I spoke with someone at the marina and they said that the warning sound and loss of RPMs could have been caused from the following: high temperature, low water pressure, low oil pressure, oil pump malfunction, water pump/impeller malfunction, el nino.

The next day I added oil to the gas tank (double oiled the fuel). I went about 10 miles at 4000 RPMs and the warning didn't come back on. I also noticed that the oil was continually being drawn down in the oil tank and being consumed by the engine. So at least at lower RPMs the VRO system seems to be working.

Can anyone answer the following questions?
Does anyone know this warning system? What causes this sytem to be "triggered"? BTW does anyone know where I can get a manual for a 1990 Johnson 150GT? Would you recommend not using the VRO and mixing the fuel? What should I get checked? The water pump, oil pump, thermostat?, etc. Thanks in advance.

Cal posted 08-01-2001 01:27 AM ET (US)     Profile for Cal  Send Email to Cal     
The engine manual (pg 9) for my '92 Evinrude 150 states that on 150 STL, 155, and 175 models a continuous horn and rpm limited to 2500 rpm results from an engine overheat problem.

Steady horn and no rpm drop indicates fuel restriction.

Note 1 says the cylinder head screws must be retorqued as soon as possible. They also suggest reducing to idle and running in reverse to clear any debris from the intake screens.

S.L.O.W is the overheat warning system that limits rpm to 2500. After the engine has cooled, shutting off the engine resets the warning system.


triblet posted 08-01-2001 10:23 AM ET (US)     Profile for triblet  Send Email to triblet     
How come you are asking the same question
again a couple of days later? Didn't like thefirst set of answers? ;-)


Tom W Clark posted 08-01-2001 11:01 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

It's another mysterious double post. Look at the original post date; it's actually from before the other question. Where's our moderator to straighten this out?

TampaTom posted 08-03-2001 09:33 AM ET (US)     Profile for TampaTom  Send Email to TampaTom     
Not getting enough water at high speed. Could be a combination of factors. Mounting engine high, trim angle, and seaweed or grass (had this happen all the way across Okeechobee) If it happens again, run it in reverse, bliping the throttle. That helps clear the water pickups.
Tom W Clark posted 08-03-2001 10:21 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

Could you please blend these two threads together?

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