yamaha 115 please help

[robertcropdust]

Hey guys i have a 2001 yamaha oil injected 2 stroke engine has aprox 80 hrs. The motor does not idle properly all the time, it will slowly drop rpms and die it does not look like it is running rich when rpm drop. sometime you have to crank on engine for 30 sec to get it to start i have changed plugs and ran ring free additives. I have herd of the smaller engines having power pack problems, what do you think? thanks robert

 

[bigbrownbuku]

Re: yamaha 115 please help

what has been your usage pattern robert? motor sits a lot? used daily? do you have a filter installed for your fuel system?<br />whats the service history of your engine?

 

[robertcropdust]

Re: yamaha 115 please help

hey ben c i normaly put about 5-7 hours a month on the motor. I have had two service inspections by the dealer at 10 hrs and 25hrs i have no inline fuel filter just the yamaha filter under the engine cowl. i have no problem with power at mid and high rpms. thanks robert

 

[douglloyd]

Re: yamaha 115 please help

Sounds like the carbs are due for a cleaning. Idle jets are getting jammed up. After you get them cleaned make sure you get a fuel/water seperating fuel filter installed. (Racor)

 

[rodbolt]

Re: yamaha 115 please help

sounds like a tad bit of fuel nasties in the idle fuel jets. may be time to clean the carbs. usually caused by lack of running. sometimes its hard to run them enouugh.

 

[bigbrownbuku]

Re: yamaha 115 please help

an external water separating filter is necessary equipment. check the filter under the cowl its a window to everything downstream. pour the contents into a container and look carefully for water or dirt, if you have never spotted water in fuel you may not see it so add some clean gas to that mix. the water will lay at the bottom.