Conference vicki::boats

    
    
    The beeps documented in the OMC owner's manual may not indicate
    how the boat manufacturer may have implemented these features.
    
    My '89 Bass Buggy with 60HP OMC also does not beep when key is
    first turned to the on position.
    
    Check with the boat manufacturer.
    
    gb
    

    I will check the dealership today (closed Monday). Mine did however
    did beep last year but the long cold winter knocked it out. I hope
    someone can help me with this because I already pulled it North and
    will not bring it back until the Fall.
    
                                          -Steve

    
    Steve - I'd say either the horn has died, a wire to/from the horn has
    died, or the little circuit that makes the horn beep as a test (when
    you first turn on the key) has died. I vote for the last on.
    
      You can easily test the warning horn. Look on the back of the
    powerhead near the sparkplugs and find a single wire that seems to just
    go into the block. THAT is the temp sensor for overtemp. Find the place
    that wire comes apart and ground it to the block with the key on. The
    warning horn should sound.
    
     There's ways to do this same thing with the low oil/ no oil sensor, but 
    I think this is easiest. If the horn comes on in that test, you know
    the horn is good and it is the power-up test circuit that is not
    working.
    
    				Kenny

    You were right on Kenny!!
    I tried the test last week with the grounding the overheat sensor and
    did NOT get any sound. Not knowing what the circuit looked like, I did
    not know what this meant. This test is in the manual but it doesn't
    explain what the problem is if it doesn't sound. The dealer said
    exactly what you said. The sensor should be good,,,,so it is either
    the horn or a connection to the horn. I am leaning towards the
    connection because I already had to rewire some of the poorly crimped
    wires. I soldered them to the post.
    
    Thanks                                 -Steve

    
     Is this a test? And if so, can I get to go boating now?
    
    
      *GRIN*  Only kidding! Always glad to help. If there's any more I can
    do to help, let me know.
    
    				Kenny

    Moved by moderator.
    
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Note 1063.0               OVERHEAT ALARM ON 115 JOHNSON               No replies
FSOA::DBROSNIHAN                                     14 lines  14-JUN-1993 10:28
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    I have a 1977 115 johnson which sounded the alarm in the control box.
    
    I have been told this indicates an overheat problem.
    
    I've tried to find the thermostat with out any sucess. The water is
    pumping but gets hot as I accelerate it then sounds the alarm.
    
    Could it be the water pump is not pumping enough? Is there a thermostat in
    these 115's? What else makes the alarm go off (not oil injected). 
    
    
    Thanks,
    
    Dennis

    I have a friend that had a 115 that alarm went off in. When he
    questioned the previous owner, new purchase, he said " oh it does that
    all the time something wrong with alarm". WRONG!!!!!. When he opened up
    the motor he found from overheating so often a wrist pin bushing came
    loose and wore a hole in the cylander wall. 
    	Two posible causes are 1. thermostat stuck closed. thermostat
    located at rear of engine between heads below electronics. 2. water
    pump worn and/or broken, located in lower unit just above gearbox.
    	The water pump has a rubber impeller that will wear and or take a
    "set" and not pump water well. The pump may also breakdown and lose
    pieces of rubber throughout the system. Some of the repair manuals
    recommend annual replacement of the pump, but my 78 125 still had a 7
    yearold pump in it when I rebuilt the engine and it lokked fine.

	I just brought a newer boat and it has a temp gauge for the engine.
	When I had it out Sunday, it was ready about 180 when going
	slow but during heavy load a little over 200.


	I checked the manual and cann't find normal operating temp.
	I planning on have the water pump and impeller changed
	but would like to know what it normal running temp.

	Engine is a 85 175 hp Johnson.

					Thank
					 Jim

    An excellent question given that outboards *rarely* have temperature
    gauges (why is this, all I/Os have them?).
    
    My OMC manual doesn't list operating temperature.  If the buzzer
    goes off it's too high, that's all they think you need to know!
    
    

    
      I *think* the thermostat on those is about 140-160. I'm SURE that
    200+ is too high, BUT! You can't assume it, but it could be the gauge.
    The problem is that if it isn't, you could be in for a big problem. So,
    you need to get it checked right away.
    
    				Kenny

I will let you know what I find out.

		 Jim

    I believe in my manual for my 72 125 Johnson they tell you to check the
    thermostat using thermal sticks. 160 deg melt before thermostat opens
    and 180 deg melt after thermostat opens. Nothing about what temp the
    buzzer goes on at. A 20 degree rise from thermostat opening, under
    heavy load for short periods probably is not a problem but it would be 
    worth checking accuracy of guage.

    Where does one buy "thermal sticks"?
    Thanks, Wayne

The dealer said the problem with the engine running hot was the
thermostats. They said there was some salt buildup on them. They removed
the thermostats and didn't replace them. He said that for boats run in the
salt, that the thermostats are best removed. He also said that if I wanted
he would put them in. What do you think about this ?

I going out tomorrow and will check it out.

				Jim

    
      You should have them in. With the thermostats out, you run the risk
    of running at too cold a temp. The entire engine is machined with
    clearances set to run at a certain temp. Running a cold engine at high
    rpm is asking for piston scuffing. THAT much I know, its also possible
    that the oil will not work as well at low temps.
    
    				Kenny
    

	I just called them and there sending the thermostats to me.
	
	I didn't think that sounded right.

				Thanks again for your help
					Jim

    Thermostats work in two ways.  They allow the engine to warm up to
    operating tempatures when the engine is cold.  Just as
    important, though, is once they are open, they are there to restrict
    the flow thru the engine just enough to allow the correct transfer of 
    heat to the colder water.  Without the thermastats in place, the water
    will flow too fast and not remove the heat properly.
    Wayne

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Note 1079.0               Warning Alarm & PTT OMC 140hp                  1 reply
GIDDAY::MITCHELL                                     18 lines  19-JUL-1993 00:29
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    	My apologies for bringing up this subject again,but someone
    may have had this problem or may be able to help.
    	I have a 1991 140 HP Johnson outboard and when the motor is 
    running (in most cases above 2500rpm ) the warning horn beeps once
    when the power tilt/trim button is pressed to trim the motor up or 
    down.The problem is intermittent and does not happen every time the
    motor is trimmed.
    	The warning horn sounds when key is turned to on before starting
    as normal,and on one occasion the alarm sounded approx every 20 secs
    indicating low oil which was the case,so  as far as I am aware the
    alarm system is working ok.
    The motor has been to two seperate outboard mechs but problem still
    occurs intermittently
    	Any ideas,help appreciated.
    
    			Happily boating Down Under  Dave.

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                                -< Powerboats >-
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Note 1079.1               Warning Alarm & PTT OMC 140hp                   1 of 1
SALEM::ORLOWSKI                                      16 lines  19-JUL-1993 06:53
                      -< Modern Technology Strikes Again >-
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    I just replaced the omc horn on my Sea Nymph ($29.99 $$$)161 FM. The
    replacement unit,as the original, is Made in Mexico. This would be my
    guess..........First check out the wiring for shorts but if it beeps
    before you start, this (according to the omc folks) means the horn is
    ok. The only other thing it could be is the actual sensor in the
    engine. Another thought is maybe because of the drop in voltage to trim
    the engine the horn restarts it's initialize sequence.
    
    I think omc has more testing to do on this circuit...
    
    Note: My new horn works but it sounds SICK!! IT has been redesigned
          which usually indicates a problem in design.
    
    
                                                      -Steve
    Good Luck!!!

    
    Thanks for your thoughts.The Horn was replaced about 10 mnths ago and
    made no difference.I think your idea of the voltage dropping causing
    the circuit to re-initialize would probably be the most likely cause.
    Though if this was the case I would have thought more people would
    have had the same problem.
    	The battery is new and the wireing has been checked for lose
    connections,with nothing found.I don't think there is anything
    major wrong with the motor,it is more of a nuisance when the horn 
    beeps when trimming the motor.