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Old 14 March 2006, 18:29   #1
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Engine Hours

Are engine hours calculated in real hours, i.e if I turn my engine on, and leave it ticking over, will it count as an extra hour on the engine for each actual hour I leave it running just the same as it would if I was blasting around at 40 knots, or is it based on the RPM or something?
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Old 14 March 2006, 18:37   #2
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My understanding is that its 'real' hours..

Ollie
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Old 14 March 2006, 18:46   #3
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Definitely "real" hours - I was horrified when I took my Suzuki DF140 in for its first service to find this breakdown of engine RPM :-

0-1000 rpm, 564 min
1000-2000 RPM 248 min

2000-3000 RPM 188 min
3000-4000 RPM 248 min
4000-5000 RPM 140 min
5000-6000 RPM 38 min
ABOVE 6000 RPM, 4 min

Id spent 50% oif the 20 hours at tick over and another 25% just off tick over.

OK - so I didn't mind that much as I was running the engine in - but it made me think - and I switch her off if we are sat around doing nothing these days.
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Old 14 March 2006, 18:49   #4
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Thanks guys
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Old 14 March 2006, 18:51   #5
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that is a scarey stat

i would love to see the stats for my honda 90, that would be interesting indeed. having spent a great deal of its life on the river.

hope me merc spits out data like your suz does


Quote:
Originally Posted by roycruse
Definitely "real" hours - I was horrified when I took my Suzuki DF140 in for its first service to find this breakdown of engine RPM :-

0-1000 rpm, 564 min
1000-2000 RPM 248 min

2000-3000 RPM 188 min
3000-4000 RPM 248 min
4000-5000 RPM 140 min
5000-6000 RPM 38 min
ABOVE 6000 RPM, 4 min

Id spent 50% oif the 20 hours at tick over and another 25% just off tick over.

OK - so I didn't mind that much as I was running the engine in - but it made me think - and I switch her off if we are sat around doing nothing these days.
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Old 15 March 2006, 03:40   #6
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Quote:
Originally Posted by Hugh Jardon
.......hope me merc spits out data like your suz does
If it doesn’t maybe one of these would be useful Des
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Old 15 March 2006, 04:09   #7
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I would say most boats have the same stats. My engine was just serviced and whilst i didnt spend as long at tickover, i did at 1000 to 2000, probably due to the Chichester entrance to northney run (8knts), seems to take forever some days
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Old 15 March 2006, 04:10   #8
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i should add percentage wise
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Old 15 March 2006, 11:20   #9
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Is there any way you can read the engine hours/rpm stats out off your engine yourself? Possible for Mercury ? I bought a second hand Tornado and love to check if the statments of the seller are correct concerning the engine.
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Old 15 March 2006, 11:53   #10
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I think the service people have these little hand held things that read off this info - i always ask for a printed copy, which they can easily do. I do this for exactly your reason e.g if i sell the boat there is a documented record.


I suppose you could ask the owner if he has such a printout or ask him to get one.

P.S these print outs are quite good , well my evinrude one is as it shows any faults or potential up and coming issues, e.g if the engine temp reading keep going up maybe there is a water cooling issue, it could be as simple as a blocked hole in the block with salt in it - that sort of thing
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