Light for 15 HP Merc?
 

We have a 15 horsepower Mercury (actually, Mariner) outboard for our
RIB. We sometimes use it at night, and want to mount an all-around
white light on the motor. The motor outputs 20-40 V non-rectified,
non-regulated power. We're afraid we'll simply blow out any bulbs
intended for 12-volt use. Short of buying a voltage regulator (way
too expensive), is there any solution to this problem?

Rob

Light for 15 HP Merc?
 

I suspect that putting a diode on one lead and using a 24 volt bulb
would function. The intensity would vary and it would probably strobe
a bit but it would be cheap.

-- Tom.

Light for 15 HP Merc?
 

On 2007-08-02 11:13:13 -0400, Akka said:

We have a 15 horsepower Mercury (actually, Mariner) outboard for our
RIB. We sometimes use it at night, and want to mount an all-around
white light on the motor. The motor outputs 20-40 V non-rectified,
non-regulated power. We're afraid we'll simply blow out any bulbs
intended for 12-volt use. Short of buying a voltage regulator (way
too expensive), is there any solution to this problem?

Rob

Check it's output with a load on it with approximately the same
resistance as a bulb, say about 10 ohms to be on the safe side if my
math's right. (Connect the resistor across the two wires in parallel
with your volt meter)

Those generators are designed for what you want, so it may be working properly.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's new pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI pages: http://homepage.mac.com/jerelull/BVI/

Light for 15 HP Merc?
 

On Aug 2, 1:25 pm, wrote:
On Thu, 02 Aug 2007 08:13:13 -0700, Akka
wrote:

We have a 15 horsepower Mercury (actually, Mariner) outboard for our
RIB. We sometimes use it at night, and want to mount an all-around
white light on the motor. The motor outputs 20-40 V non-rectified,
non-regulated power. We're afraid we'll simply blow out any bulbs
intended for 12-volt use. Short of buying a voltage regulator (way
too expensive), is there any solution to this problem?

Rob

Buy a light that uses a couple of flashlight batteries.

Actually, this was our first (and second, and third) solution.
Unfortunately, the standard version of that light (a) leaks and (b)
vibrates off its screw attachment. W're tired of draining the light
and our little pot of gold for this.

Rob

Light for 15 HP Merc?
 

Akka brought forth on stone tablets:
On Aug 2, 1:25 pm, wrote:

On Thu, 02 Aug 2007 08:13:13 -0700, Akka
wrote:


We have a 15 horsepower Mercury (actually, Mariner) outboard for our
RIB. We sometimes use it at night, and want to mount an all-around
white light on the motor. The motor outputs 20-40 V non-rectified,
non-regulated power. We're afraid we'll simply blow out any bulbs
intended for 12-volt use. Short of buying a voltage regulator (way
too expensive), is there any solution to this problem?

Rob

Buy a light that uses a couple of flashlight batteries.


Actually, this was our first (and second, and third) solution.
Unfortunately, the standard version of that light (a) leaks and (b)
vibrates off its screw attachment. W're tired of draining the light
and our little pot of gold for this.

Rob


That 20-40 V is what you see unloaded. Hook up a light and see what it
produces with a load.
bob
s/v Eolian
Seattle

Light for 15 HP Merc?
 

Try 24 V light bulbs, they could survive 20-40V for quite a while.
Heavy trucks use(d?) 24V, so they should be readily available,
and replacing one every now and then should be cheap.



On Aug 2, 8:13 am, Akka wrote:
We have a 15 horsepower Mercury (actually, Mariner) outboard for our
RIB. We sometimes use it at night, and want to mount an all-around
white light on the motor. The motor outputs 20-40 V non-rectified,
non-regulated power. We're afraid we'll simply blow out any bulbs
intended for 12-volt use. Short of buying a voltage regulator (way
too expensive), is there any solution to this problem?

Rob

Light for 15 HP Merc?
 

Diode ????????????

On Aug 2, 11:30 am, " wrote:
I suspect that putting a diode on one lead and using a 24 volt bulb
would function. The intensity would vary and it would probably strobe
a bit but it would be cheap.

-- Tom.

Light for 15 HP Merc?
 

Light for 15 HP Merc?
 

On Aug 6, 2:17 pm, " wrote:
Diode ????????????

Well, the OP said it was "non-rectified" and a diode would take care
of that and halve the volts (RMS), no?

-- Tom.