8.1 horizons positives and negatives

landscape1777

Recruit
Joined
Apr 25, 2007
Messages
2
looking for advice on these motors. I'm looking at purchasing a 1998 searay 400 with these motors(251 hrs). Any input would be appreciated
 

newport dave

Chief Petty Officer
Joined
Nov 21, 2004
Messages
458
Re: 8.1 horizons positives and negatives

Are you sure it has 8.1's? That engine didn't come out until 2001.

Anyway, no matter what engines it has, have someone do an engine survey. That should include (at least) oil analysis, compression test, scan engine operating history and fault history, and visual inspection.

The last time I did an engine survey on a similar boat (2003 Searay with 8.1's) the biggest thing I found was that the exhaust manifolds needed to be replaced. They were the original aluminum manifolds and had corrosion/cracking where the bronze elbows thread into the bottom. Be sure to take a look at those.

Dave

81elbow
 
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