496HO, high rpm miss ????Any ideas?
06-05-2003 | 11:42 AM
#23
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Joined: May 2002
Posts: 279
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From: Pasadena, MD
You can also get them from a NAPA auto parts store. They carry NGK. I believe I paid $2.15 a piece.
I would be interested to know how that plug works out on a N/A motor. The BR7EFS is a colder plug with a shorter reach than the stock plug. It may increase the transom soot on the HO's. For $16 it's a pretty cheap and easy trial though.
I would be interested to know how that plug works out on a N/A motor. The BR7EFS is a colder plug with a shorter reach than the stock plug. It may increase the transom soot on the HO's. For $16 it's a pretty cheap and easy trial though.
07-19-2003 | 09:09 AM
#25
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Joined: Oct 2002
Posts: 105
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From: Louisville Ky
I have a pair of 496 HO's, and had a similar problem. We found a fuel starvation problem. If you do not have an additional in line fuel filter the chances are this may be your problem. There is a screen in the inlet side of the boost pump that gets clogged, because the fuel is not filtered until after the boost pump. Merc. is aware of this problem and added an in-line filter, but they are a little pricey. We ended up installing Racor filters.
07-20-2003 | 10:54 AM
#27
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Posts: n/a
I had the same problem as island hopper on my 496HO. I'ts to bad that our boat builders are that sloppy on cutting and tapping there fuel tanks. In my opinion fault lies on builder not merc. I did find a fram filter for $ 3.99 ,merc wanted $50. I'm currently running without the inline filter hoping my tank is clean.
10-13-2003 | 02:50 PM
#28
Rough Seas Lie Ahead
Joined: Feb 2002
Posts: 2,465
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From: Virginia Beach, VA
So, has anyone confirmed Christopher's discovery on the spark plug brand/numbers (BR7EFS, #1094) on their 496HO yet? I've been meaning to pull mine to check'em out, but haven't gotten around to it yet...
