Yamaha audible alarm and low rpm

[pallet king]

I have a Yamaha 200 2-stroke HPDI, I think a 2003, 2200TXRB. I am a rookie.

Yesterday, out on the water, I got an audible alarm and the engine would not allow me to run over 1900 rpm. I assumed I had an overheating alarm and that the engine was going into safe more. I was 10 miles from home and I had my four daughters, nervous wife and labrador in the boat. Everyone looked at me like, "nice going, idiot" and time began to pass a little slowly.

I beached the boat and shut it off for an hour and a half. When I turned the key, alarm returned. I disconnected the sensors on the heads (yellow and brown wires)...alarm remained. Both test open on the fluke continuity sensor. The engine is not hot to the touch. The engine and reserve oil reservoirs are full. The engine reservoir fills when I toggle the switch by the tank.

Assuming I do not have a heating issue, and the engine is receiving oil, I am thinking I have a bad sensor. Other than the head sensors, what else could be setting off the alarm? Are there too many to list? And am I on the right track?

I apologize for this post in advance. Reading pasts posts for this issue, mine seems juvenile and stupid...but I could use some guidance on where to go from here.

 

[rodbolt]

Re: Yamaha audible alarm and low rpm

and here is where the yamaha digital multi function stuff shines. if you have the tach and the speedo or speedo fuel management then look at them, they will indicate for overheat,oil in the engine tank oil in the remote tank(no audible on that one) low battery voltage and the kicker, water in the fuel.
the HPDI motors had a water detect sensor in the fuel water filter on the engine on the later models, if yours is equipped it will have wires coming out, there are also various filters sold that have water detect.
if you have the fuel management meter and no water detect if the red/white wire thats unused near the fuel flow sensors gets wet with salt water it will trigger the alarm.
later 05 and up I think, HPDI motors have water detects but the alarm WONT sound if the engine is in gear, only in nuetral, you figgue out why, I quit trying .

 

[pallet king]

Re: Yamaha audible alarm and low rpm

rodbolt, it was water in the fuel water filter in the engine. I appreciate your help. next time I will try to post a more challenging intellectual puzzle!

One daughter held the flashlight while I removed the filter, showed her the water, dumped the contents and refilled with gas. So, with your help, I have shaken some of Saturday's idiot stigma.

Have a great week.

 

[rodbolt]

Re: Yamaha audible alarm and low rpm

easy on the puzzles
poor brain only gets lucky so often.
but DO NOT run it anymore without changing your hull mounted seperator, its full and now is passing water AND creating excessive fuel suction side vacum.
if you dont have a hull mounted filter, install it NOW.

 

[TonyNoriega]

Re: Yamaha audible alarm and low rpm

rodbolt, it was water in the fuel water filter in the engine. I appreciate your help. next time I will try to post a more challenging intellectual puzzle!

One daughter held the flashlight while I removed the filter, showed her the water, dumped the contents and refilled with gas. So, with your help, I have shaken some of Saturday's idiot stigma.

Have a great week.

I really should know exactly what filter you guys are talking about in case it happens on my 200hpdi. Are you refering to the vapor separator....the metal unit that's forward on the port side? Or the see-through fuel filter that sternward of the vapor separator? Or is there yet another filter that I'm not aware of? BTW, I change my 10-micron hull mounted fuel/water filter AT LEAST once a year and so far no problems down stream from there.....

Thanks!

 

[rodbolt]

Re: Yamaha audible alarm and low rpm

toni
what ya have to remember is yamaha added the feature, its up to the cheap azZ customer and the dealer that monted it to the hull to insure its done correctly.
to many customers simply wish to pay the least, to many salesmen simply want a comission. I am simply a monkey, at least I do have opposible thumbs.
read my first post and it will solve your yamaha issue, your prehinsle tail issue I cant fix.
all I am is a tech, however I am a very dedicated tech.
sharp sometimes, yep, sarchastic sometimes? yep. but I am very very dedicated to making sure my offshore customers come home each time.

 

[pallet king]

Re: Yamaha audible alarm and low rpm

Rodbolt, I had to head out of town this week...so I can't address this right away, but I am pretty sure I have no hull mounted separator. It would not be an in-line filter I am assuming.

Thanks for the heads up. I'll get it done before I (we) head out again.

 

[rodbolt]

Re: Yamaha audible alarm and low rpm

myself? it should be against the law top sell a hull without a water seperator, preferably one with an alarm, however its not.
takes an hour or less to install and a good one 10 micron with a 60 gallon per hour flow rate, is about 50 dollars.
however probably half my annual income is water in the fuel.
I dont like it, its entirely preventable, but it is what it is.