Trouble Starting Yamaha

[DFreedom]

I have a 2003, 2-stoke, 70 hp Yamaha. I am having trouble getting it started. If you spray carb cleaner in it, it will start and idle a little rough but once it warms up it runs great. It will restart as long as the motor is warm/hot but if it sits too long I have to use carb cleaner to get it started. Two questions, any idea why it won't start on it's own and, is it harmful to the engine to use carb cleaner to get it started? This is driving me crazy because once it is running, it runs great. I ran it all the way out to Little River Inlet today and it never missed a beat.

[crash1371]

Carb cleaner takes away the lubricants and can cause engine failure. did you pump the gas bulb ,Did you clean plugs others will chime in

[Sandy]

Are you using the choke?

[seagull22]

Does it have that Prime Start Auto ignition system like my 90 hp? If it does, there is an element that heats up and chokes the engine, if you advance the throttle before this thing works the engine will have trouble starting. Have to crank on my 90, it finally starts after you think it will never start and like you mentioned, cranks fine after the initial start up. Do not like this thing at all, was used to my old Johnson 85 hp that cranked with one click of the choke switch, no matter how long it sat up.

Edited August 5, 2009 by seagull22

[DFreedom]

Primer bulb is tight, plugs were cleaned and gap checked. I am using the choke, just want to start without help. I probably won't b out again before I can get it into a shop. Just seems odd, runs great once it is started. I am not sure about the Prime Start Auto Ignition. Guess I'll just let the shop sort it out and hope it is a cheap/easy fix.

[heatseeker]

Primer bulb is tight, plugs were cleaned and gap checked. I am using the choke, just want to start without help. I probably won't b out again before I can get it into a shop. Just seems odd, runs great once it is started. I am not sure about the Prime Start Auto Ignition. Guess I'll just let the shop sort it out and hope it is a cheap/easy fix.

Sounds like its time to take off and clean the carbs. Might just be a cheap fix.

Andres

[Capt Rick Hiott]

,,,,,,,,Ethanol SUX!........................................That is most likely your problem.

NEVER spray starting fluid or carb cleaner in a 2 stroke,,never!

Use a fuel additive for ethanol before you go into the carbs, it will help a lot. You should also change your fuel filter.

Edited August 22, 2009 by Capt Rick Hiott

[1bandit]

Had the same problem when I had both carbs rebuilt on my 115 after Ivan.

You need to adjust the choke so the butterfly valve closes all the way

when you choke the motor.

[DFreedom]

It is in the shop now. It is suspected that it might be the starter assembly (prime start) that connects to the side of the middle carb. Guess I'll know in a few days.