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Old 09-02-2015, 09:11 AM   #1
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Merc 260

After how many hours should a 260 have new rings fitted?
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Old 09-02-2015, 01:35 PM   #2
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50!
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Old 09-02-2015, 03:48 PM   #3
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Cheers Burty.
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Old 09-02-2015, 05:14 PM   #4
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******* hell!!!
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Old 09-02-2015, 07:01 PM   #5
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Quote:
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After how many hours should a 260 have new rings fitted?
60 hours ago!
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Old 09-02-2015, 09:35 PM   #6
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After how many hours should a 260 have new rings fitted?
I'd have thought Ross would be the one to answer that.

He's very knowledgable for his age you know.
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Old 09-02-2015, 10:47 PM   #7
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I'd have thought Ross would be the one to answer that.

He's very knowledgable for his age you know.
He might even be able to wangle you warranty replacements on the old rings, he knows his consumer rights
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Old 10-02-2015, 02:58 PM   #8
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you could always not bother and then wait for the bang that way it might do 65 hours and you can come back and say Burty was wrong they do 65 hours between rebuilds
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Old 10-02-2015, 04:08 PM   #9
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I could do Burty. I think it's almost time for a rebuild. Trouble is I'm guessing how many hours I've done. So a bit of a lottery really. The sooner the better I think.
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Old 10-02-2015, 07:54 PM   #10
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Always heard "50h", but I also heard that hours @ +6k rpm count double ?

Besides a log of 'hours since last rebuilt', can one take a look through the spark plug holes and evaluate of 'it's time' ?

Which brings us to the next question : how do you evaluate exactly ?
Is an inspection throught the spark plug holes sufficient ? Or do you have to take off the heads ? Other alternatives ?

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Old 10-02-2015, 08:39 PM   #11
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Leak down test above a certain percent is what the yanks do I believe?
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Old 11-02-2015, 07:20 AM   #12
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so easy to wire in !

http://www.ebay.co.uk/itm/Hour-Meter...item56706e98bb
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Old 11-02-2015, 05:03 PM   #13
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Quote:
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Leak down test above a certain percent is what the yanks do I believe?
yup, got one for sale if needed, 200 plus postage, you'll need a compressor though. used to use it on my 280's after every outing. only takes half hour which is a well spent half hour if it saves a hole in it.
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Old 11-02-2015, 05:05 PM   #14
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yup, got one for sale if needed, 200 plus postage, you'll need a compressor though. used to use it on my 280's after every outing. only takes half hour which is a well spent half hour if it saves a hole in it.
Good bit of kit of your running race motors!!
10% ain't it burty?
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Old 13-02-2015, 10:39 AM   #15
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I worked on 8% as thats what JSRE instructions say
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Old 15-02-2015, 02:47 PM   #16
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I've got a leakdown tester in the workshop if you want to borrow it...just make sure it finds it way home when your done

It's in the rear workshop, on the second set of racking on the right as you go in, 2nd shelf up, in a red plastic box in the top of a grey plastic container
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Old 15-02-2015, 03:07 PM   #17
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Old 26-02-2015, 12:21 PM   #18
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Just done leak down test on it, and I'm happy to say that all 6 are between 4 & 5%. Whoop whoop!
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Old 26-02-2015, 12:28 PM   #19
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I need to do both of mine :/
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Old 26-02-2015, 12:38 PM   #20
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Glad I've done it mate. Gives me some peace of mind for a while.
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