Rough Idle on new VMax 150 Carb model

[glangfor]

Yamaha VMax 150. Model V150TLRB just mounted on my Javelin. I've had it out 1 time for 1 hour and the idle is still extremely rough. I did drain the gas tank today and plan on taking it out this Saturday. I'm hoping the rough idle will cure itself with fresh fuel, but I was hoping someone could give me a few suggestions if the fuel is not the issue. Ran good on plane (3000 RPM). <br />Thanks<br /><br />Gerald <br /><br />The dealer I bought the Engine from is 6 hours North. I'm hoping I don't have to make that kind of road trip. <br /><br />Thanks Again

 

[rodbolt]

Re: Rough Idle on new VMax 150 Carb model

hello<br />without actually seeing and hearing I cant really tell if its rough running or not. look at the plugs. if they are dark close the idle mix screws 1/8 of a turn if they are light try to open them 1/8 . if its a new motor you may wish to consult the dealer. sometimes the double oil will affect the idle speed and stability.<br /> good luck and keep posting

 

[BRIAN03]

Re: Rough Idle on new VMax 150 Carb model

Jerry There is some great Yamaha Dealers on the coast. We dont see to many bass boats.

 

[glangfor]

Re: Rough Idle on new VMax 150 Carb model

Well, I took my Rig out Saturday with a freind of mine. Finally stretched her out after my hour meter hit 3 hours. My speedo was registering 68 MPH at 5400 RPM with no chine walk....WOW am I impressed. I'll just live with the rough idle until the end of the break-in and change plugs then. Hopefully that will solve the problem. Thanks for the advice.<br /><br />Gerald

 

[luise]

Re: Rough Idle on new VMax 150 Carb model

well gerry, are you runnning a 25/1 oil mix for the break in, if so that could be the problem,<br />if so, try changing the plugs, if problem persists, then wait for break-in, could be os is trying to compensate for rich oil and can't. In any case, idling issues are better addressed after break-in. Rough idling could stem from many factors like idle speed fuel circuits, vacum<br />leaks, sour fuel, emulsified water in fuel, malfunctioning sensors which could leed to incorrect idle timing, defective thermostat opening to early not allowing proper engine warm-up, man the list is a mile long. I suggest tryng the simple plug thing first and wait till the break-in is up, if that don't remedy the problem<br />then it is in your best interest to take it back to the dealer to resolve the issue.