dandreye
Petty Officer 2nd Class
- Joined
- Oct 19, 2007
- Messages
- 141
Hi All,
Is it a known issue where Yamaha F80-F100 series outboards get their cylinder #4's connecting rod broken, damaging the crankcase? If so where can I find tech bulletin and/or any other docs with further details incl the root cause? Been reading a thread about it on a different forum and trying to help. Most of those who report it claim they were cruising at ~5000rpm when it happened, and that it's more likely to happen with low-hour engines (~200-300 hours). Some claim Yamaha replaces damaged blocks in Europe (during warranty I suppose), making me think it's a known defect indeed.
The same issue is also reported for Mercury 90hp 4-strokes (same block).
Apologies in case of any mistakes or inconsistencies as I am a happy user of a 2-stroke Merc 90hp myself and have never owned any of the above. Tried searching before asking but nothing came up, probably 'cos I'm not using the right terminology to describe the symptom.
Many thanks in advance!
Is it a known issue where Yamaha F80-F100 series outboards get their cylinder #4's connecting rod broken, damaging the crankcase? If so where can I find tech bulletin and/or any other docs with further details incl the root cause? Been reading a thread about it on a different forum and trying to help. Most of those who report it claim they were cruising at ~5000rpm when it happened, and that it's more likely to happen with low-hour engines (~200-300 hours). Some claim Yamaha replaces damaged blocks in Europe (during warranty I suppose), making me think it's a known defect indeed.
The same issue is also reported for Mercury 90hp 4-strokes (same block).
Apologies in case of any mistakes or inconsistencies as I am a happy user of a 2-stroke Merc 90hp myself and have never owned any of the above. Tried searching before asking but nothing came up, probably 'cos I'm not using the right terminology to describe the symptom.
Many thanks in advance!
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