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Old 03 April 2005, 17:17   #1
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Mercruiser 1.7 dti engine failiure

For the second time in less than a year we have sufferd a blown engine (holed piston) on our 1.7 mercruiser inboard diesel. We have heard that this is not an uncommon problem. I would be gratefull if anyone who has sufferd similar problems or knows anything about this would contact me, either through this forum or by E.mail.

Thanks Chris.
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Old 03 April 2005, 17:50   #2
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Was rather hoping not to see any of these threads

There is at least 3 regular posters on this forums with this engine in 6-6.5m ribs, and none of us have suffered a problem like that i dont think.

How heavy is the boat its in and what rpm do you rev it to?
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Old 04 April 2005, 02:45   #3
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Yes, looking forward to an answer on Chris' questions. Would also ask at what engine hours did these failures arise ?

Peter
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Old 04 April 2005, 02:48   #4
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I intended to ask if the failures arose on the same or different cylinders.
Thanks,

Peter
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Old 04 April 2005, 06:59   #5
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Sorry to worry anybody, Our boat/engine was 3 years old in Feb the engine hours at the first failiure were just over 200 hours and have only done another ten hours since then. Revs at the time were 3100 rpm in both cases, the boat was loaded wit six divers & kit plus one cox and was not on the plane.
Dont know if same piston or not as we have not had chance to strip engine yet.
Have seen thread of similar problems on www.ybw.com/forums.02 03 05
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Old 08 April 2005, 20:41   #6
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If you want to find someone to have a rant with, contact Bob Layton Marlin Dive Charters who after killing his 3rd inboard after only 4 hours has gone for outboards....
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Old 05 December 2006, 13:52   #7
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Just so people know, Mercruiser revised this engine in 2005. If your serial number starts with 88 it's the reivsed version and this problem has been resolved
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Old 05 December 2006, 15:51   #8
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Quote:
Originally Posted by alt View Post
Just so people know, Mercruiser revised this engine in 2005. If your serial number starts with 88 it's the reivsed version and this problem has been resolved
what was the problem that caused the blow ups?
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Old 05 December 2006, 15:58   #9
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what was the problem that caused the blow ups?

I'm no expert, what i've read is that a bad spray pattern on Cylinder 3 caused a holed piston. The revised model (88 serial number) had this problem fixed (My engine, thank god!) I could be wrong, it's only what i've read
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