Mercury 85 hp fuel problem

T

tgriff8880

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Joined
Nov 7, 2005
Messages
1
!976 Mercury 85 hp thunderbolt.Motor runs great. After shutting doun for 15 min the motor acts like it has no fuel in the carbs. Can spray fuel in carbs and the motor starts instantly. Checked fuel pump-ok fuel -line -ok cleaned and checked filter -ok can not choke it enough to start. Bulb stays hard .Spray fuel in carbs and it runs great.<br />Motor is trimed level. Need help.....Thanks
 
L

Laddies

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Joined
Sep 10, 2004
Messages
12,218
Re: Mercury 85 hp fuel problem

Your low speeds could be a little lean and if choking won't help ck to see if the choke shutters are sealing alright
 
D

deh1

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Sep 7, 2005
Messages
6
Re: Mercury 85 hp fuel problem

tgriff<br /><br />Did you buy the motor with this problem or is it a new problem in your old motor? Does it do the same thing when you first start up cold or only after running for 15 minutes?<br />I have a 1976 Merc 1150 that had identical symptoms when I first got it. It turned out I didn't know the "secret Mercury starting procedure". There should be several old posts on it.<br />It may be a simplistic suggestion, but this aggravated me for days until I stumbled onto it on Iboats.
 
C

cmgerman

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Joined
Jun 4, 2005
Messages
5
Re: Mercury 85 hp fuel problem

Most of my low speed/idle problems are solved by a good grade of fuel and if necessary and additive to boost the fuel. I'd certainly try and see if it makes a difference,if you aren't already using top shelf stuff........
 
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