Today's Message Index:
----------------------
1. 12:24 PM - Fuel Pump (mike Pienaar)
2. 06:03 PM - Re: Fuel Pump (sjbeaver)
3. 07:25 PM - Re: Fuel Pump (mike Pienaar)
Message 1
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Thanks again for your help, got my engine started and will check oil level
in fuel pump again when I have run it again.
I cannot visualise what the oil does in the fuel pump. I have model 5151.03
and the manual mentions oil in through pressure reducing valve (29)
with the level controlled by a drain hole (31) and out to the scavenge
pump (32) You say "The pump is just sensing oil pressure"
May I ask you to explain again.
If it is not too much trouble is there a convenient time for us to chat on
the phone?
Thanks again and keep well
Mike
I apologize if this is a duplicate
Message 2
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The injection system determines how much fuel to deliver by measuring
three inputs: Manifold pressure (based on throttle position) atmospheric
pressure and oil pressure. Manifold pressure and atmospheric pressure
are very much lower than oil pressure, so a pressure reducer is used to
get the oil pressure into the same sort of range as the other two.
The purpose of manifold and atmospheric pressure is obvious. The oil
pressure is used to provide automatic enrichment for starting. When you
are starting the engine, oil pressure is zero so extra fuel is supplied.
Once th engine is running, oil pressure comes up and the mixture is
automatically leaned to the correct setting. Think of it as a sort of
automatic choke.
Steve
--
Stephen Beaver
Tel: 614-937 4189
> On Sep 13, 2020, at 3:24 PM, mike Pienaar <mikepienaar09@gmail.com>
wrote:
>
> Thanks again for your help, got my engine started and will check oil
level in fuel pump again when I have run it again.
>
> I cannot visualise what the oil does in the fuel pump. I have model
5151.03 and the manual mentions oil in through pressure reducing valve
(29)
> with the level controlled by a drain hole (31) and out to the scavenge
pump (32) You say "The pump is just sensing oil pressure"
> May I ask you to explain again.
> If it is not too much trouble is there a convenient time for us to
chat on the phone?
>
> Thanks again and keep well
>
> Mike
>
> I apologize if this is a duplicate
Message 3
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Thanks Steve
I was considering using a pre-oil system that has a reservoir of
pressurized oil that will fill the oil galeries before start..According to
the way I read you explanation this will not work and my mixture at start
will not be risch enough?
Thanks
Mike
On Sun, Sep 13, 2020 at 6:03 PM sjbeaver <sjbeaver@gmail.com> wrote:
> The injection system determines how much fuel to deliver by measuring
> three inputs: Manifold pressure (based on throttle position) atmospheric
> pressure and oil pressure. Manifold pressure and atmospheric pressure are
> very much lower than oil pressure, so a pressure reducer is used to get the
> oil pressure into the same sort of range as the other two.
>
> The purpose of manifold and atmospheric pressure is obvious. The oil
> pressure is used to provide automatic enrichment for starting. When you are
> starting the engine, oil pressure is zero so extra fuel is supplied. Once
> th engine is running, oil pressure comes up and the mixture is
> automatically leaned to the correct setting. Think of it as a sort of
> automatic choke.
>
> Steve
> --
> Stephen Beaver
> Tel: 614-937 4189
>
>
> On Sep 13, 2020, at 3:24 PM, mike Pienaar <mikepienaar09@gmail.com> wrote:
>
> Thanks again for your help, got my engine started and will check oil level
> in fuel pump again when I have run it again.
>
> I cannot visualise what the oil does in the fuel pump. I have model
> 5151.03 and the manual mentions oil in through pressure reducing valve (29)
> with the level controlled by a drain hole (31) and out to the scavenge
> pump (32) You say "The pump is just sensing oil pressure"
> May I ask you to explain again.
> If it is not too much trouble is there a convenient time for us to chat on
> the phone?
>
> Thanks again and keep well
>
> Mike
>
> I apologize if this is a duplicate
>
>
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