VRO alarm at low speed all the sudden. Help!!!

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: VRO alarm at low speed all the sudden. Help!!!

Various members are speaking of alarms BUT no mention has been made of exactly what alarm is being heard other than to say that it is a VRO alarm. Which of the following is being spoke of here. Eliminate any possible confusion.

(VRO Horn Warnings)
(J. Reeves)

NOTE: I retired around 1991/92. Possibly some of the later V4 engines and others may also incorporate a fuel vacuum switch that would enable a fuel restriction warning to sound as mentioned below, an unknown factor to myself.

1 - A steady constant beep = Overheating - The V/6 engines, possibly some others, have a fuel restriction warning which is also a steady constant beep.

2 - A beep every 20 or 40 seconds = oil level has dropped to 1/4 tank. (Late model engine = Every 40 seconds)

3 - A beep every other second = VRO failure, air leak in oil line, oil restriction, (anything that would result in a lack of oil being supplied to the engine).

NOTE - If the warning horn is the black plastic (overpriced) three wire type horn, the warning horn should beep once when the ignition key is turned to the ON position. If it does not, it is either faulty or someone has disconnected it (a stupid move!). At any rate, if it does not beep which indicates that the horn is non functional, find out why and do not run the engine until the problem is corrected.
 

oonie

Cadet
Joined
Jun 12, 2010
Messages
7
Re: VRO alarm at low speed all the sudden. Help!!!

Various members are speaking of alarms BUT no mention has been made of exactly what alarm is being heard other than to say that it is a VRO alarm. Which of the following is being spoke of here. Eliminate any possible confusion.

(VRO Horn Warnings)
(J. Reeves)

NOTE: I retired around 1991/92. Possibly some of the later V4 engines and others may also incorporate a fuel vacuum switch that would enable a fuel restriction warning to sound as mentioned below, an unknown factor to myself.

1 - A steady constant beep = Overheating - The V/6 engines, possibly some others, have a fuel restriction warning which is also a steady constant beep.

2 - A beep every 20 or 40 seconds = oil level has dropped to 1/4 tank. (Late model engine = Every 40 seconds)

3 - A beep every other second = VRO failure, air leak in oil line, oil restriction, (anything that would result in a lack of oil being supplied to the engine).

NOTE - If the warning horn is the black plastic (overpriced) three wire type horn, the warning horn should beep once when the ignition key is turned to the ON position. If it does not, it is either faulty or someone has disconnected it (a stupid move!). At any rate, if it does not beep which indicates that the horn is non functional, find out why and do not run the engine until the problem is corrected.

Thanks, Joe.

I just changed the warning horn (it is overpriced for sure). And I confirmed that "A beep every other second". Pretty frustrated been fixing and testing for 2 months since.
 

oonie

Cadet
Joined
Jun 12, 2010
Messages
7
Re: VRO alarm at low speed all the sudden. Help!!!

Anyway, decided to run on pre-mixed. Just have a bit more smoke than usual at idle.
 
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