this f40 giving the mechanics a headache

S

Saltwaterchallenge

Recruit
Joined
Apr 26, 2012
Messages
2
Posted a thread up here last week about my 2005 f40 yammy not wanting to start. Took the boat to the shop last friday, they have put new jets in the carbs, cleaned them, and they have synchronized the carbs. They just called me and asked me if i had done anything to the motor in the past, which i replied with no. Its still cranking rough and cuts out. If any of you guys have any suggestions, im all ears.
 
9

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,298
Re: this f40 giving the mechanics a headache

is this a Yamaha shop with techs that know how to work on these Yamaha 4 strokes?
 
R

robert graham

Admiral
Joined
Apr 16, 2009
Messages
6,908
Re: this f40 giving the mechanics a headache

Those guys need to troubleshoot to identify the problem, Then start cleaning and replacing parts....it could get expensive for you, and you still got your problem! Good Luck and keep us posted!
 
SparkieBoat

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: this f40 giving the mechanics a headache

sad to say, but not many competent EFI mechanics out there.
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: this f40 giving the mechanics a headache

Is fuel squirting out of the accelerator pump tubes into the carbs when you operate the throttles?
 
L

Ldavidgrover

Petty Officer 2nd Class
Joined
Feb 22, 2012
Messages
197
Re: this f40 giving the mechanics a headache

When they did the carbs. Did they drill out the brass plug for the mixture screw?
 
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