Bought he boat without much research my entire bad fault. To good of deals usually end up this way. When I turn my key no I don't hear any noise or beep.

Side not my voltage has been low since this happened.

Just took it to one of the most reputable merc mechanics in Wisconsin right out of Oshkosh dropped it off and told them everything that I have wrong.

I bought the boat off of power boat listings from a small town in Texas north east of Dallas will post a picture to see if anyone recognizes it.

99% sure there was a charger on the engine before I bought it but seller said no. Also it is a 2004 and it was advertised with 200 hours on engine and that is what meter says in engine bay but will have the mechanic scan the engine to check it out.



Side note, if I find there is actually a **** ton of hours on the engine woukd you think there is legal evidence of him having to help pay for some of the repairs?

Trim tabs do not work, trim barely works as of last week, just a headache, depressing first buy and realize it is my fault for not having it professionally looked over

Also for guy asking about cmi headers I did not install them they came with boat but I did out corsa captains call on it not sure what he did with sensors. He told me he sent the ecm to whipple to have it tuned

You are only a few miles from me, I am not sure who would be reputable around this area. I will help you figure this out if I have to fix it myself.

Post the engine serial number (it is ok to do that we can't do anything with it).

BUP who responded on here is one the best 496HO problem solvers in the country. Because of where you bought the boat there is a chance he may have worked on it and the previous owner did not want to fix per his recomndations. I tell you listen to him.

If the CMIs were order for the 496. They have the temp bung installed.

The above plus engine shutting off / running like crap, sure sounds like a voltage issue to me. Before digging into wiring, please question your battery (s) and alternator.

I actually live in oconomowoc I am haveing Riggs marine service look at the boat out of Oshkosh is that who you were thinking of?

Also I do not have serial number of engine as it is there right now.

I will upload a photo right now of boat to see if anyone recognizes it


There is 4 batteries on the boat to upkeep with sound system but possibly alternator isn't doing its job.

Your biggest wild card right now is that ECM tune. I would email Whipple with the ECM s/n and ask them nicely if it was tuned for charger or not. If it was tuned for a charger and you do not have one it will never run right.
As much as it pains me, because it's not cheap, I would recommend getting it tuned back to stock. Most mechanics are only going to know what things are supposed to be, not what they should be with the tune. I would not be shocked if you are told to get a new ECM. Most of the guys around here are good, but they are glorified parts changers and not so much on the diagnoses side. That does not make them bad, its just most fixes are pretty simple. Unfortunately, you have what I believe to be multiple issues going on. In addition, depending on who has your boat it may be awhile before you see it again, this is a very busy time of year for these guys. I can tell you stories about all of them.
If they say you need a water pump get the harden marine one. It is better for the 496ho application in the water that we boat. Sand silt eats up the brass pumps kind of fast.
Riggs is good this is not their forte, think carburetors.

Here is the boat I boat I bought if anyone recognizes it

https://imgur.com/gallery/QC6mt


Questofpower thanks a ton for the info I will be giving you a call after Riggs calls me and tells me what they think the issue is and I will run it by you

Sounds good

Also expect that call in about 3-6 weeks.