First time poster, long time lurker. Hoping one of the old hats can chime in here.
2013 f300xca. Acquired boat and engines around 350 hours. Did the engine oil, oil filters, tstats, fuel filters (on board and outboard) gearcase lube, water pumps and housings at 400 hours. Currently at about 440 hours. No water when 100 hour service was performed. I did the work myself.
Noticed water in port engine oil last week. Immediately changed oil multiple times until oil ran clean. Had this done at a local shop due to time constraints. Asked shop to do compression/leak down test. All cylenders tested 160 ±/-, 5psi. Shop claims they did a leak down test, but haven't given me the numbers yet. Shop also claims that one of the timing belts was degrading. Had them replace belt while they had the boat. Going to seatrial soon. Shop claims no water appearing in oil while running on the hose.
Shop tech has no explanation for water in oil. Suggested that water may have entered via the exhaust due to engines being low on the transom. I like to fish when I have time, and sometimes it is rough out... I call bullshit on this explanation.
So, a few questions for the brain trust here.
1. Other than a possible warped oil pan, cracked head, bad head gasket, or cracked block, are there other "known culprits" on this powerplant that may cause this symptom?
2. Is it possible for a head gasket to blow and not affect performance, and the engine still passes a compression check? Any pro tips for validating this? I'm not afraid to tear the heads off and swap gaskets for peace of mind.
3. Anyone have any insight into whether or not it's possible to get water in oil on the exhaust stroke, if water somehow pushes back up the exhaust while running in sloppy conditions? How about while key off at the dock, if someone got overzealous with the hose pointed at the center of the prop?
4. Assuming oil milks up during seatrial tomorrow, any advice on next steps?
5. Note that I'm planning to check crankshaft runout by lifting on the flywheel, using a test dial indicator, on the engine that the timing belt was degraded on.
6. Last but not least, these went out of warranty in July. Anyone have experience negotiating with yamaha on "goodwill", assuming I have the infamous thrust bearing failure? Any pro tips other than to beg and grovel?
Interesting first post, I know, and I appreciate anyone who may have pointers for me. I have some experience turning wrenches, but I've always ran old two strokes. I hope this experience isn't indicative of what ownership of this new fangled 4 stroke power will be like, and I hope I haven't purchased time bombs...
Thanks in advance for any feedback.
2013 f300xca. Acquired boat and engines around 350 hours. Did the engine oil, oil filters, tstats, fuel filters (on board and outboard) gearcase lube, water pumps and housings at 400 hours. Currently at about 440 hours. No water when 100 hour service was performed. I did the work myself.
Noticed water in port engine oil last week. Immediately changed oil multiple times until oil ran clean. Had this done at a local shop due to time constraints. Asked shop to do compression/leak down test. All cylenders tested 160 ±/-, 5psi. Shop claims they did a leak down test, but haven't given me the numbers yet. Shop also claims that one of the timing belts was degrading. Had them replace belt while they had the boat. Going to seatrial soon. Shop claims no water appearing in oil while running on the hose.
Shop tech has no explanation for water in oil. Suggested that water may have entered via the exhaust due to engines being low on the transom. I like to fish when I have time, and sometimes it is rough out... I call bullshit on this explanation.
So, a few questions for the brain trust here.
1. Other than a possible warped oil pan, cracked head, bad head gasket, or cracked block, are there other "known culprits" on this powerplant that may cause this symptom?
2. Is it possible for a head gasket to blow and not affect performance, and the engine still passes a compression check? Any pro tips for validating this? I'm not afraid to tear the heads off and swap gaskets for peace of mind.
3. Anyone have any insight into whether or not it's possible to get water in oil on the exhaust stroke, if water somehow pushes back up the exhaust while running in sloppy conditions? How about while key off at the dock, if someone got overzealous with the hose pointed at the center of the prop?
4. Assuming oil milks up during seatrial tomorrow, any advice on next steps?
5. Note that I'm planning to check crankshaft runout by lifting on the flywheel, using a test dial indicator, on the engine that the timing belt was degraded on.
6. Last but not least, these went out of warranty in July. Anyone have experience negotiating with yamaha on "goodwill", assuming I have the infamous thrust bearing failure? Any pro tips other than to beg and grovel?
Interesting first post, I know, and I appreciate anyone who may have pointers for me. I have some experience turning wrenches, but I've always ran old two strokes. I hope this experience isn't indicative of what ownership of this new fangled 4 stroke power will be like, and I hope I haven't purchased time bombs...
Thanks in advance for any feedback.
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