an 08 pro XS, I knew it! coil, coil, coil!!!

Don't let them jerk you around. Make sure you find out if "all" the coils fall under the Merc SB.

Could be may different things as everyone has mentioned, but I just got my 08 250 proXS out of shop....same symptoms..ended up being one failel coil and another failing intermintently. Mercury replaced all six under warranty along with all of the spark plugs. Like everyone has said, it is a known problem with 08/09 Mercury Pro XS and they will make good on it if its still under warranty. Push to have all of the coils replaced if it does end up being a coil issue! Good Luck

Didn't read through everything so sorry if this is a repeat. Might be as simple as a loose plug wire. Happened to me once right after I got her out after a shop visit. Sure enough one of the wires was loose. Mercs don't ride well on 5 cylinders.

Thanks for all the info, will be taking it in today, will keep you posted.

Thanks

You know it chance. Bet a cold beer its a coil prob. Wish I had all the time back with my boat that it has spent in the shop since I've owned it. If this is the first time this has happened to it since you owned it square you are one of the lucky ones. But man when that xs is running right it sure is hard to beat

I have been lucky, only second time in shop not of my doing. First was to replace the fuel lines now this.

I have the same motor and had the same issues. It was in the shop and fixed three times. Finally a Mercury rep from the factory was visiting the dealer. They spent four hours trying to make the boat run right on the water. Finally they replaced the entire top end and the complete computer. Sorry I don't know the technical term but it sounds like the exact same thing. My motor had about 60 hours on it when this occurred. Good Luck! Sorry if this has been stated I didn’t read the entire post.

Yes I'm thinking ECM like my major problem. That little jewel is $10k. So don't like replacing them. They will try everything before they go that route. If they do it's cheaper and easier for Mercury to send a new dressed power head.

Dropped it off this morning, spoke to the mechanic and explained what's occuring, first thing out of his mouth was coil. He said if that's it, Merc says replace all six. Will know for sure later.

Thanks for all the info, what a knowledge base on TFF, now can anybody tell me how to catch fish

good news is the new coils are from a different vendor and there has been zero issues with the new coils

I would say a bad plug and or damaged plug wires...

Confirmed, coil and with the TB they will replace all 6, free of charge

That's good square! They need to. There is a bad prob. With them. Glad it worked out for you. Nobody took my beer bet so I guess i'll have to buy my own. I been fighting coils since about 3 months after I bought my boat. Good luck buddy!

dflipper, i'll buy you that beer, by chance you fishing the Northern BC division?

Ha ha. No I live in SE Texas. I appreciate it though.

I'll be in your part of the woods Mar and Apr, so if you see a Blue and Silver Bass Cat Cougar, give me a shout.