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Thread: cold starts on IO360

  1. #1

    cold starts on IO360

    In the fuel injected engines there is no carburater with a bowl full of gas to start the engine. You have to run the boost pump to get some fuel in the cylinders before it will fire. You can crank all day before the engine driven pump will get enough gas in the cylinders to fire. The injector atomizes the fuel somewhat, enough to fire, but on a cold day it takes a good shot of fuel to ignite and a couple of tries where the engine fires but does not catch before the cylinder is warm enough to vaporize the cold fuel. It takes a bit of feel to get the right amount of fuel in the cylinder, just enough but don't flood it. With fuel injection you don't have a primer hand pump to get this fuel in the engine like you do with a carburated engine.

    Willis, A23 with Continental IO346

    Paul Werbin <paulwerbin@yahoo.com> wrote: I had thought that when "priming" cold Fuel injected
    engine the idea is to pressurize the system, not to
    allow cold fuel into the cylinders. "priming " my
    IO360 with throttle closed and the starting with elect
    fuel pump off, slight throttle open always seems to
    produce a fast and easy start. Turning on the fuel
    pump with the throttle open a little before start
    sounds like a fire risk. Reviewing the Lycoming manual
    seems to agree on this for cold starts.
    Is there a different procedure for some of the
    different IO360s out there? Or is there more to all
    this stuff?
    Paul


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  2. #2

    cold starts on IO360

    I have a good post in the BAC FAQ on starting these engines. Just search on
    'start fuel injected'.

    _____

    From: musketeermail@yahoogroups.com [mailto:musketeermail@yahoogroups.com]
    On Behalf Of Paul Werbin
    Sent: Wednesday, January 25, 2006 8:14 AM
    To: musketeermail@yahoogroups.com
    Subject: [musketeermail] cold starts on IO360

    I had thought that when "priming" cold Fuel injected
    engine the idea is to pressurize the system, not to
    allow cold fuel into the cylinders. "priming " my
    IO360 with throttle closed and the starting with elect
    fuel pump off, slight throttle open always seems to
    produce a fast and easy start. Turning on the fuel
    pump with the throttle open a little before start
    sounds like a fire risk. Reviewing the Lycoming manual
    seems to agree on this for cold starts.
    Is there a different procedure for some of the
    different IO360s out there? Or is there more to all
    this stuff?
    Paul


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