[Jetmech88]

I have twin 1999 150 OX66's.
Both run great. Here's the problem I can't figure out.
When I get to the boat and turn the batteries on all is well. Turn port ign switch on and get 3 beeps from the buzzer and then silence. Same with the starboard engine. They both start quickly and purr like kittens.
BUT, every time after the first, when I turn the port ign switch to on, the buzzer continues to beep. Not a continous beep but the beeps just keep on beeping after the 3 normal beeps.
If I turn the battery switch for the port engine to off and back on again and turn ign to on, I get my 3 beeps and alls good, but only once.
To make a long story shorter, I have to turn the battery off EVERY time I want the buzzer to operate normally.
My oil tank on the engine stays in the full range. I never run my remote tank below 1/2 full.
The motor runs great. No overheating problems. The water pump telltale squirts fine. The port engine uses the same amount of oil (yamalube) as the starboard. I don't think there is anything wrong with the engine, besides maybe a bad sensor or something.
I have swapped the tachs, but no help.
Batteries are both like new with good voltage.

All I can think of is that when I turn the battery off to the port engine, it's like I am resetting something that works OK for one time only, then it screws up.

I am going to replace my fuel/water seperators tomorrow, but there is no evidence of water in the engine filter bowl. No water in the oil that I can tell.

I'm lost on this but just can't get past the fact that removing power from the engine makes it work properly one time.

I have NEVER had the alarm sound while the engine was running, only when I turn the key to on before I crank it..

ANY IDEA's ??
I appreciate any thoughts or advice you can give.
Thanks for your time,
Dennis

[John_Madison CT]

Here is a link to a great site with the help of Ray N. who knows Yamaha's very well.

Here ya go:


http://www.boatsetup.com/cgi-bin/ubb...?ubb=forum&f=7


Cut and Paste.


Keep us in the loop on your problem so we can all learn.


Good Luck,

John from Madison ,CT

[Jetmech88]

John from Madison ,CT
Thank you for the link to the board. I just registered and posted the above topic. Hopefully I'll get some guidance from one of the boards.

Thanks again, I appreciate your help.
Dennis

[tarpon]

I had this happen. It was wierd, couldn't figure what was wrong.

Guess what? It was low battery voltage. Stuck in a new battery, no more beeps.

I think the weak battery was refreshing the charge when I disconnected, then as the engine stayed on the battery the voltage dropped.

But it was not easy to figure out.

May not be your problem, but check your batteries. And don't forget to give the wiring a once over. A bad connection could have similar effect.

Once the engine starts it is 'on the alternator'.

Batteries can cause weird things to happen when they fail.

These new computer controlled engines are much more sensitive to flaky batteries than the old style carb engines.

tarpon

[yamtech]

jetmech88
is this A problem that just started on its own or has the boat had a new insturment installed.
the problem you have is interesting the reason that I asked about new gages is that if the yellow wire on the port ig switch was pluged into the red wire to the starbord insturment harness you would get a similar problem.also one last question do you have A fuel management gage and if so dose it power up when either engine is turned on or just one engine.

[Jetmech88]

Yamtech, Thanks for the reply.
The problem just started on it's own. Nothing new installed.
Yes I do have the Yammie fuel mgmt system. When I turn the port ign switch on, only the port tach powers up. When I turn only the starboard ign switch on, the starboard tach, fuel mgmt and speedo power up.
Something else I noticed today.
As I stated in my original post, if I turn the port battery switch to off and back on the beeper works correctly until I run the engine for a few minutes then it will screw up everytime after.
BUT now today I learned that I can also just let the port engine sit (ign switch off) for a couple hours and the beeper will operate correctly (once) without turning the battery off and back on.
Also today I physically swapped the engine mounted oil tank switches and also swapped the electrical connectors on the remote oil tanks and the problem remained on the port engine.
I hope I'm not confusing you with my description of the problem and my troubleshooting steps.
I do appreciate your time and help.
Dennis,

quote:Originally posted by yamtech:
jetmech88
is this A problem that just started on its own or has the boat had a new insturment installed.
the problem you have is interesting the reason that I asked about new gages is that if the yellow wire on the port ig switch was pluged into the red wire to the starbord insturment harness you would get a similar problem.also one last question do you have A fuel management gage and if so dose it power up when either engine is turned on or just one engine.

[GAP]

Hey Jetmech,
We had a similiar, not exact, but close problem with the alarm/horn system. You may want to take the port cowling off and there are five or six wires that connect to a thingamabob (sorry) and come out the other side. Take each one, pull it out wipe it off or spray the connector w/ compressed air - maybe a grain of sand or salt that got in there. Reconnect each wire - make sure they are reattaching to same opening. Anyways we did that and it stopped the whatever short or problem it was. Wires are on the right of the engine if looking at it from up in the boat. Let me know if it works.

Geoff

[pthein]

Believe it or not salt can cause a number of wierd things. You say you have changed nothing on the boat since the problem started. If you have some salt on the motor (and this is good for the motor as well) take a hose and gently wash the entire motor off. If you have salt away use that also. Let the motor dry in the sun. Make sure to wash the inside of the cowling. Once all salt is removed and the motor clean and dry you can spray the entire thing with a silicone or water displacing protectant. They sell them in the store and the Yamaha tech rep told me Merc. makes a great one. Believe it or not I have seen this process curfe a few wierd electrical problems on motors that have some moisture and salt buildup.

[KevinM]

NO SILICONE! It will kill your O2 sensor! Use LPS #3.

[yamtech]

jetmech88
check to see if there is power to the yellow wire after you turn the key off, even A low voltage it dosn't need to be 12 volts to cause a problem post me back this sounds like A fun one.

[Jetmech88]

quote:Originally posted by yamtech:
jetmech88
check to see if there is power to the yellow wire after you turn the key off, even A low voltage it dosn't need to be 12 volts to cause a problem post me back this sounds like A fun one.

Yamtech,
Fun for you maybe. Just kidding.
I wont get to the boat until this weekend and I'll check this out.
Are you talking Yellow wire at the tach ? ign switch ?? somewhere else ???

Thanks yamtech.
Appreciate the help. I know the motor is fine, but the buzzer not working properly is just driving me nuts...
I HATE having any type of warning system glitches.

[yamtech]

jet mech88
I am talking about the yellow wire that powers up the port tach if that wire is still hot after you turn the key off the I would look to the memory curcuit on the oil injection.this curcuit is designed to keep leroy in the boat"at least acording to RICK MARTIN at yamaha eng".it is possible that the memory curcuit is keeping the ignition module powered up for a while.
this curcuit is there to keep the low oil alarm and light on even afteh you add oil to the boat tank if it runs low, only to reset on your engine after you shut the key off.actualy I need to look it up as to what the reset is on your engine they changed it on me it is either shut off or return to nutral I will look it up and repost.at any rate I am thinking that if yous engine needs to be shut off to reset the oil houd curcuit then the hold curcuit may not be resetting by the ig key.if that is the case the easyest way to test is to switch them port engine to starbard engine and see if the problem moves to the other engine.
the hold curcuit is in the engine tank oil level sending unit if you do switch them make sure to line up the arrows,make sure the foam washer is still on both pickup tubes and last but not least if the screen comes off the float make sure the breather hole is over the flat of the rubber cap when you put it back togeather.any questions post.

[Jetmech88]

Yamtech,
I did already swap engine oil tank sending units port to starboard and the problem remained on the port engine. The problem did not move to the other engine.
In fact, I had to drain the port tank because the foam washer slipped off the tube while removing the unit I pulled out of the port tank. So I had to drain the oil to retrieve the washer. When it was reassembled I turned the ign on ,and verified the eng tank was automatically replenished.

Please note I also swapped the electrical plugs on the remote oil tanks port to stbd and the buzzer problem still remained on the port side.
I didn't physically swap remote tanks, just the plugs going to them.

If you have any more ideas fire away and I'll try em out and get to the bottom of this.
I will check that yellow wire going to the port tach with the ign off to see if it has any voltage on it, and let you know.

Thanks again Yamtech, I appreciate your help.
Dennis

[yamtech]

jetmech88
oops I looked it up to reset the hold curcuit on your engine you need only to bring rpms under 1300 and make sure oil is in both tanks, sorry about sending you in the wrong direction.from your discription to reset the problem you are having to remove all power to the engine or turn the key off and wait till voltage drops below a certain point.let me give it some thought and if I think of anything that would cause your engine to store power I will post you. I take it that you have already seperated the two engines as far as wireing goes. to test this with both keys in the off position measure power to the yellow wire at both key switches it should be "0" volts. then turn on the starbord key check both engines again and only the starbord engine yellow wire should have power. then shut off the starbord key and turn the port key on now only the port yellow wire should have power.