Are I/O drives really that bad??

tonyjvan

Cadet
Joined
May 21, 2004
Messages
13
Surveyor David Pascoe in his book "Buyers Guide to Outboard Boats" says the following:<br /><br />"It is incontestable that the stern drive power option is the most troublesome and ultimatly costly to own."<br /><br />He goes on the explain why (Galvanic corrosion, etc) but his biggest argument is the very high cost of parts and repair. He also says:<br /><br />"...stern drives are a poor choice for any boat that is going to remain afloat in sea water."<br /><br />He also feels that Mercruiser is the worst of the lot based on his 20 years experience.<br /><br />Compelling arguments. But I still see a large number of boats here in the Northeast used in sea (salt) water that seem to do fine year after year.<br /><br />Can someone put this in perspective for me?<br /><br />I'm looking for a boat now. Should I look for an inboard? Am I rolling the dice with an I/O? <br /><br />What's your opinion?<br /><br />Thanks Tony
 

BinLurkin

Petty Officer 2nd Class
Joined
Mar 12, 2004
Messages
192
Re: Are I/O drives really that bad??

Tony, I've had the Merc Sterndrives since 1984 & the only problem I've every had was with the U-joints & leaking bellows. Both on the two recently purchased 1978 & 1979 260 units. I owned the ol' 1970 215 unit for 16 years & never did nothin' to it except rebuild the Holly 4bbl carb. No corrosion probs. Course, the old 215 had the Mercathode on it.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Are I/O drives really that bad??

Consider this. GM sell more engines to Mercruiser than all the other sterndrive manufacurers PUT TOGETHER! If they were that bad why are they still outselling all the others? As for Mercuisers being the worst... Well I've worked on most brands, Mercruiser, OMC, Volvo and Yamaha and I can tell you that the Merc is the easiest to work on, and have the cheapest parts. Like all machinery, if it's maintained it should give years of reliable service. If it's neglected then it's going to extract revenge, (personally I think that people who don't maintain their equipment don't deserve to own it!). <br /><br />The opinions express above are those of the author.<br /><br />Chris...........
 

merc200

Seaman
Joined
Jan 24, 2004
Messages
67
Re: Are I/O drives really that bad??

I have owned four outboards before I owned my current I/O. I hate outboards with a passion. Hard to work on, expensive parts, and the list goes on. My current setup is a mercruiser 165 chevy 250 6. I know the engine will run forever as long as I keep oil in it. No more gas/oil mixes for me!!!!!!!!!!!
 

record hunter

Petty Officer 3rd Class
Joined
Apr 22, 2003
Messages
99
Re: Are I/O drives really that bad??

I have a pre alpha mercruiser I.O. that is a 1979 I bought it 10 years ago I change the drive oil every 100 hours along with engine oil and check the alignment every winter. I have changed the water propeller u joints and gimbal bearing and the bellows. These are all regular maintanance things. I would not have any other out drive my friends have volvo very exspensive and the omc are not that good
 

John Carpenter

Petty Officer 1st Class
Joined
Nov 1, 2002
Messages
336
Re: Are I/O drives really that bad??

I don't really remember how many I/O boats I have owned, but about a dozen...all Merc's except for one OMC 800. They have all given good service with no real problems that did not involve hitting something solid :rolleyes: I have also owned numerous outboards, and have also found them to be pretty dependable. The I/O system has the advantage of a power plant that can actually be worked on by a normal person.<br /><br />My current boat is a straight inboard with Paragon transmission, and I much prefer it over the other types...just seems simpler and has given zero problems over the years.<br /><br />As far as Pascoe is concerned...he is clearly experienced and knowledgeable... I respect his opinions and often agree with him. However, our priorities and viewpoints sometimes differ. My advice would be to spend some time around the marinas in your area, talking to boat owners and mechanics...you will soon get a feel for what works best in your area for the type of boating that you want to do.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,074
Re: Are I/O drives really that bad??

I have owned both outboards(30 yrs) and I/Os(8 years). I do all my own repairs and maintenance. I have estimated that outboards require about $300/year less normal maintenance and repairs than I/Os. This does not include the normal stuff (impellers, spark plugs, grease/oil, carb service, wires...) I/O require (in addition to outboard requirements) replacement manifolds and risers, U-joints, bellows, thermostats, engine waterpumps, hoses, alternators and starters. Outboard starters, alternators(or equiv)and thermostats seem to outlast the equivalent components on I/Os, for some reason. <br /><br /> I/Os run better, use less fuel, do not need OB oil and are great for trolling. As a general rule, both have their advantages and shortcommings
 
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