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Old 30 September 2014, 16:40   #11
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Originally Posted by Davie View Post
I think you have a problem elsewhere. The head gasket leaking into the water jacket doesn't explain water in the sump.
Agree... Hence

Before you put it all back together be sure to check the oil pan and oil pan gasket. The pan on 115 like to rust out/fail and its a bear to access. Leads to lots of salt water in the oil and a rapidly ruined engine. Its a known issue with the Yam115, locally I know of several people having it.
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Old 30 September 2014, 18:08   #12
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.
Looks like you've a broken bolt there too. .
Where ?
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Old 01 October 2014, 02:34   #13
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Where ?
Thought it was in the third picture bottom right, but looks just like light reflecting.

Speaking of corroded oil sumps, wasn't there a thread a couple of years back on a Honda?
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Old 01 October 2014, 17:45   #14
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Those yam f100 have a common fault of corroded sumps! I have seen lots and it's a very expensive repair. I would want to have a look at the sump.
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Old 04 October 2014, 11:28   #15
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Here's the plan. ( head skimmed 7thou taken off will post pictures tomorrow.) Will fit head back on.going to measure old head bolts and check for stretching they should be ok as they are in an alloy block if there is any stretch then I will replace them. Not going to worry about the sump just yet. The head gasket was shot someone else had replaced the head gasket before when I bought the engine it had 510 hours on it and it has 750 on it know not the (650 is a mistake) I suspect an over heat, think they just fitted a new gasket and punted it on without checking for damage .Not fazed any more about working on these outboards. Let's face it I have saved a fortune so far by dismantling it myself . Human built human fixed.just take your time . Had the head skimmed at autohead Inverness charged 35 the guy there said they had done a few outboards
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Old 05 October 2014, 12:08   #16
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Click image for larger version

Name:	ImageUploadedByRIB Net1412525140.995613.jpg
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ID:	99661Click image for larger version

Name:	ImageUploadedByRIB Net1412525227.555583.jpg
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ID:	99662Click image for larger version

Name:	ImageUploadedByRIB Net1412525284.200152.jpg
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ID:	99663 skimmed head
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Old 05 October 2014, 12:37   #17
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That looks a lot better - lovely jubbly
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Old 03 May 2015, 18:04   #18
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F115

Water in oil . Engine flushed head skimmed, new head gasket fitted head back on .went on holiday (oct) did not test until last week .Pleased to say that after running her for 6 hours. I can confirm that it was just the head gasket that was the fault. total time 4 hrs total expense 150 new oil, head skimmed ,head gasket. new timing belt.
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Old 04 May 2015, 02:30   #19
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Good news. Nice to see you're back on the water.
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