Mercury Re-power issues?

Short sighted

New Member
Nov 12, 2018
8
Boat Info
26' Sundeck 2007
Engines
383 mercury repower
Hi purchased a 2007 SeaRay with Mercury 383 Repower by previous owner, unfortunately the unit uses excessive oil, end of year 2 of 3 year transferable warranty......I believe its ring seal and/or bad pistons used etc.

Anybody had any experience with this?

THanks

Anybody have any similar issues
 
What do you consider excessive? How many hours were on the repower when you bought it and how many hours now? What type of use is the engine subject to? What oil is in the crankcase?
 
What is the compression on the engine. If all good the engines could be carboned up. Is their blue smoke when you start the engines. If you idle engine in calm water is there a sheen on the water near the exhaust.
 
+1 - If the warranty was transferred to you, bring it in for service - have them do a leakdown test - have you had the oil analyzed?
 
What do you consider excessive? How many hours were on the repower when you bought it and how many hours now? What type of use is the engine subject to? What oil is in the crankcase?

Documents show service by previous owner ( marina) every 100 hours or less using mercury 25w40. I purchased 7 months ago, with 321 hours on it, 24 months into a 3 year mercury transferable warranty. I used it for approx. 10-12 hours and had service done because it was already down over a quart. I have added about 3-3 1/2 quarts since and currently up to 360-370 hours. I assume its a piston / ring seal issue as I know they don't use a forged piston in these repower assemblies.
 
Glazed cylinders and/or stuck rings will lead to high crankcase blow by. Is it raw water cooled with an oil cooler?
Sounds like it is still under warranty and you will want to take that avenue before tampering with too much.
 
I am assuming from all that has diagnosed, it needs pistons and rings, my question was more towards dealing with Mercury Warranty program......"must use this place or go to that place" and "how customer" oriented they may have been to others in similar circumstances etc.... Any feedback?
 
I am assuming from all that has diagnosed, it needs pistons and rings, my question was more towards dealing with Mercury Warranty program......"must use this place or go to that place" and "how customer" oriented they may have been to others in similar circumstances etc.... Any feedback?
Who really knows what the cause is; could be a host of things. First thing to do is get a third party to go through a leak down and trouble shooting process then a written statement of the issue. Next get the boat into the approved warrantee service center (like maybe Marine Max) and let them also go through it without them knowing you had it already done. Then compare notes and have a discussion with the warrantee service center on the path forward.
Keep it simple....
 

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