waverunner- cold start problem

J

Justwannago

Recruit
Joined
Dec 28, 2009
Messages
2
Yamaha 760 hard to start when cold or sitting for a while.
Choke is working fine & has spark.
Will run perfect once going as long as it dosn't sit for too long.
Please help
 
kend301

kend301

Lieutenant Junior Grade
Joined
Jul 4, 2009
Messages
1,005
Re: waverunner- cold start problem

Are you priming the carbs ? You need a rich fuel mixture in cold weather , hence the choke , It may start all summer in warm temps on fumes in the carbs but will need fuel and choke to start cold.
 
V8nuts

V8nuts

Cadet
Joined
Jan 1, 2010
Messages
23
Re: waverunner- cold start problem

you can always remove the choke plates and install a primer kit for about $20.00 and you will never have a starting problem again. I did that to my superjet and it worked great.
 
Jeff Walkowiak

Jeff Walkowiak

Lieutenant Commander
Joined
Jun 23, 2004
Messages
1,944
Re: waverunner- cold start problem

usually you really need to rebuild your carbs to fix the problem,, beside the internal filters getting clogged up and restricting fuel flow,, your diaphragms get old and brittle, since those operate the needle to allow fuel in the engine and they work off vacuum from the engine. when they start to get old you start to have issues where you need the most fuel at the lowest rpm,, COLD START .
 
JUSTINTIME

JUSTINTIME

Captain
Joined
Sep 2, 2006
Messages
3,284
Re: waverunner- cold start problem

yep rebuild the carb and add a primer
 
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