V8 Mercury Outboards
#143
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Joined: Jul 2004
Posts: 433
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From: Angola NY
Excuse my ignorance but what is the advantage of a twin 400hp outboard vs twin 400 hp I/O. With that mild power engine shouldn't engine life, performance and maintenance be similar. I dont understand outboards for everything?
#144
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Joined: Aug 2014
Posts: 250
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From: MN
#145
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Joined: Jul 2007
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The new OB engines are designed with much newer/better technology. Your old 502 mpi had pushrod valve train instead of a overhead cam system is just one of the 100's of major differences between the two. Your not going to see your 502 mpi last 2000 hrs yet the outboards are doing that.
The big o/b's are in the 2010's (to date) what the 525 was just prior to the Outboard domination trend took off in the boating market,
Last edited by speicher lane; 11-23-2020 at 10:52 PM.
#146
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Joined: Jun 2007
Posts: 7,311
Likes: 1,817
From: Merritt Island, FL
The LS based motors are at least closer but no one uses them in a performance boat.
That said the new 300R at 4.6 Liter and 300HP has to be one under stressed motor. But at the price tags of these things they should be reliable, just wish there were more performance V's being built.
#147
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I was just referring to the period of time when the market trend was to have the 525 blue motor otherwise it was considered not enough power to envy or you needed to be on a first name basis with your mechanic as you were breaking parts and/or drives.
No different than a merc blue engine will resell a boat faster than alternative brands - its the perception of being more reliable until the next trend in superior technology spanks the Verado.
No different than a merc blue engine will resell a boat faster than alternative brands - its the perception of being more reliable until the next trend in superior technology spanks the Verado.
#148
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Joined: Jan 2006
Posts: 3,865
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From: St. Pete Beach, FL
The new OB engines are designed with much newer/better technology. Your old 502 mpi had pushrod valve train instead of a overhead cam system is just one of the 100's of major differences between the two. Your not going to see your 502 mpi last 2000 hrs yet the outboards are doing that.
#149
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Joined: Jan 2006
Posts: 3,865
Likes: 793
From: St. Pete Beach, FL
I will say my 454 MPIs sound 10x better than my Suzuki V6s. The OBs are quiet at low speed though. I hope Mercs V8s sound better, I’d like to have a set but need to see what reputation they get first.
#150
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Joined: Jun 2007
Posts: 7,311
Likes: 1,817
From: Merritt Island, FL





