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  FYI: 04 Mercury 90 4 stroke starting solution

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Author Topic:   FYI: 04 Mercury 90 4 stroke starting solution
mojipa posted 05-26-2011 12:42 PM ET (US)   Profile for mojipa   Send Email to mojipa  
Like many of you out there, I drain and run out as much of my gas out as possible for the winter storage months on my Whaler. This Spring my motor wouldn't start though. So I changed some fuel lines, fuel filter etc. and still no start. I went to a dealer and asked a mechanic for a "miracle starting fluid" and was told that my carbs would probably need to be rebuilt. As a last ditch attempt to fix it myself, I went to Ace and bought a can of GUM OUT starting fluid and BAM the motor fired right up after a couple of sprays in the intake manifold. So my point is sometimes we should think of obvious cheap solutions, before trusting a dealer to cure our "ills"
fishinchips posted 05-31-2011 07:27 PM ET (US)     Profile for fishinchips  Send Email to fishinchips     
I agree with you. Also after getting the motor started. Sprey some carb cleaner in the throat of the carb. It helps cleaning up the gunk that is in there.


tom976 posted 06-01-2011 09:03 AM ET (US)     Profile for tom976  Send Email to tom976     
I wouldn't say the dealer is wrong. Gum Out will clean surface contamination. It doesnt do anything for the internal passages of the carb. simply because it can't get in there. When you change over the fuel lines etc. you end up with a lot of air in the fuel lines (and possible contamination) You need to work that air out of that primer bulb and lines to get it fully pressurized again.
(not sure if those motors have electric fuel pumps but running those in air isn't good either)

Another great use for GumOut is as a starter spray. Getting it in there and running it for a few seconds could have been enough to get the air out and fuel flowing. In any case a $3 fix is better than going to the dealer for a few hundred.

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