Yamaha 150 4 stroke- Difficult to re-start after running

[mhurlbert]

Have a Yamaha 150 4 stroke which starts and runs great when cold. However, after running for around an hour or more, and when hot, it is very difficult to re-start. It cranks, but does not fire. If you let it sit, and cool down, then it re-starts again just fine. Have tried different gas, checked fuel filter, water separator and battery/connections. Will try using a separate gas tank to see if this solves problem. <br /><br />Anyone else have this problem? Any ideas on what might cause it? Thanks in advance for your help! Marc

 

[mark n dark]

Re: Yamaha 150 4 stroke- Difficult to re-start after running

My f150 does the same thing. Using 12 gal plastic fuel tank. It is a bit scarey when you are out 10 miles in gulf stream that is pushing 6kts. Now won't shut off engine.

 

[JRJ]

Re: Yamaha 150 4 stroke- Difficult to re-start after running

Yamaha has a fix that your dealers should be aware of. Good luck, especially with a 12gal tank offshore

 

[mhurlbert]

Re: Yamaha 150 4 stroke- Difficult to re-start after running

Thanks for the responses. Called Yamaha today and they said there is "fix" for the F150 which is called a "Vapor Recovery Kit". Take it to a authorized Yamaha repair shop and they will install it for free. So mark n dark, you can get rid of that gas tank now, and we can finally start turning off our motors when we are offshore.

 

[redbull660]

Re: Yamaha 150 4 stroke- Difficult to re-start after running

maybe thats what is wrong with my 2003 yamaha 4 stroke 115 horse. It wont start sometimes after it has been running awhile. I will check with my dealer tomorow. thanks