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backplate and spraybar cleaning

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backplate and spraybar cleaning

Post  akjgardner on Fri Apr 24, 2015 5:29 pm

Can anyone tell me the best way to clean the backplate and spraybar?
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Re: backplate and spraybar cleaning

Post  pkrankow on Fri Apr 24, 2015 5:35 pm

I will assume it is off the engine and the reed is removed.  Remove the needle, but leave the spray bar in place, no need to mess with that

Soak in a jar of denatured alcohol or fuel overnight, use a toothbrush on it immediately on removal.  Flush the spraybar from both directions with a fuel syringe and clean fuel or denatured alcohol.  Then plug one end and make sure the hole in the spray bar is clear pushing fuel or alcohol and air through.

A pipe cleaner through the venturi is not a bad idea, just be gentle and careful of the reed seat.

Should be pretty good after that.  If it does not come all the way clean or fluid does not pass all the orifices then soak it again overnight or longer and clean it again.

Phil
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Re: backplate and spraybar cleaning

Post  robot797 on Fri Apr 24, 2015 5:46 pm

i just take a clean fuel line
and blow it trough
leef the needle but open it so far that it barl holds on
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Re: backplate and spraybar cleaning

Post  akjgardner on Fri Apr 24, 2015 8:21 pm

wow that was easy, got three locked up ebay engines running . soaked in gun oil last night and blew through the spray bar and they started right up. got one backplate soaking in denatured alcohol.hopfully i will get that one started tomorrow..Thanks for the help.
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Re: backplate and spraybar cleaning

Post  TDbandit on Fri Apr 24, 2015 8:32 pm

Also another thing while you have the needle out, inspect and clean the needle itself to make sure that there is no crud on the needle if it is re-installed with crud on it, it can be dislodged from the needle and stop up the spray bar again. It's happened to me and took me a while to figure it out lol. hope this helps (Bandit)
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Re: backplate and spraybar cleaning

Post  akjgardner on Fri Apr 24, 2015 8:48 pm

thanks Bandit, i'll do that
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