2012 250 ho etec wont run right

[CoBassin]

Good morning guys, here is my problem i ran my boat last weekend and it ran great no problems. Yesterday i put oil and fuel it with gas before heading to the lake.. put the boat in to the water and i cranked and fired and died. tried cranking like 10 times before it would start. once i got ready to take off it ran fine for about a mile then all of a sudden starts loosing power and cutting out.. switch tanks and seem to run of for about 5 mins before shutting down again. if i backed of the throttle it would run as soon as i put my foot in it it would start cutting out again idled back to the trailer and pulled her home.. any ideas would to check and try. i just i know last year i had air in my oil tank and it caused my check engine light to come on and had to have the dealer fix that also had a few codes in the system stating i wasn't returning my hotfoot all the way to the idle position when starting. I called the boat shop but around here there still in winter hours and dont open till tomorrow.. Thanks for any help.

[jc2bg]

Definitely sounds like a fuel delivery issue, but you could be chasing it for a while on your own. You could try a new hose and primer bulb, but best bet is probably checking it out with a dealer. Could be fuel pump or anywhere in the fuel system.

[Rangerdawg]

Water in gas?

[CoBassin]

So they tell me that all my spark plugs were wore out and i have a air pocket in my oil pump.. they say its good to go. crazy motor doesn't have 200 hours on it yet.

[CoBassin]

So its doing what is did last time again will be taking it back tomorrow to get it looked at.

[Danrude]

The valve that switches between tanks on the Ranger boats have been known to fail and cause those symptoms.

[jc2bg]

Spark plugs can cause a lot of deterioration in performance and rough starting, but rarely cause a motor to die once running. Air pocket in oil tank also seems out of left field. Danrude’s suggestion seems more likely to be on track.

[ChampioNman]

To rule out a fuel delivery issue ask the dealer to perform the fuel bubble test using the factory test equipment.

[CoBassin]

OK just left the dealer again, he should me the spark plugs diffidently fouled out he said he talk to a guy on evinrude tech line and that with the hours on my motor which only has 182 hr on a 2012 is low and that 65% of those hrs were idling, only 1% at 5500-to 6000 rpm, says i have a ton of carbon and that is causing my problem. told me he is going to decarbon my engine and wants me to run it hard this weekend. I guess we will see tomorrow when i go to pick it up.

[Bassmeister]

Yes sir, after a decarb you need to run her good and hard to blow it all out, Then change plugs, indexing them of course.

[jc2bg]

Exceptionally fouled plugs will be do what you describe, although it is rare to see them so thoroughly fouled. I hope you are running full synthetic XD100 oil. If not, save yourself some grief and switch.

[CoBassin]

I always run xd100 oil. do they make a hotter spark plug for high altitude?

[CoBassin]

Does anyone have evinrudes phone number?

[ChampioNman]

It is in the sticky on the top of the forum under important info. Have your serial number ready.