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Old 25 March 2012, 16:54   #11
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Country: Luxembourg
Make: Karnic 2260
Length: 7m +
Engine: mercruises 1.7 120 d
Join Date: Mar 2012
Posts: 8
Can I use a isuzu timing belt for this engine? do I need a belt for a y17DT? does anybody have the part number for this? Thanks..
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Old 25 March 2012, 21:30   #12
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Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
I had one of these engines in a RIB a couple of years ago. Went bang as they are known to do. After much yelling, we managed to get all the parts paid for - just had to cover the labour (which was still a fortune). The engine in question was out of warranty but I managed to use the awful reputation/horror stories in my favour. I'm sure I heard somewhere they gave this engine a lifespan of 900 hours
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Old 01 April 2012, 04:17   #13
nik
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Country: UK - England
Town: east cowes
Make: academic
Length: no boat
Engine: fresh air
MMSI: N/A
Join Date: Sep 2003
Posts: 540
I bought one of these in 2006, the original owner had the hole in the piston syndrome.
He got a new engine from mercruiser which included the fix for this problem.
The only issue I have had was the wastegate valve sticking open, mercruiser paid for a new turbo.
With hindsight, as there was nothing wrong with the turbo apart from the valve, I would have been tempted to either try to find a watercooled turbo with a more reliable valve, or try to fit a different system of limiting boost pressure, such as a poppet valve.
Apart from that, the engine has been reliable and economical.
And remember, if you call yourself commercial, diesel is 80p per litre.
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Old 02 April 2012, 18:32   #14
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Country: UK - England
Town: Cowes Isle of Wight
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Posts: 27
timing belt number is VKMA05608 thats a southern exhaust number. 85plus VAT
as for the wastegate issues cookee mentioned they also have tendencies to go pop in RIBS and That sort of boat due to the size and effiency of the intercooler. Its running such cold air on the induction that when you back off the revs quickly the engine gulps a big cold air in it cracks the piston.
you will find some 1.7s that have had a heater plug upgrade, (mercruiser used to offer it as a re call but then dropped it.} there is blanking spaces for the glow plugs to go into the head and a sensor in the manifold, when you backed off the revs quick you see your glow plug light on the dash light up for a second as it warmed the air in the cylinders. the kits are still available but the price is around 1000
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Old 03 April 2012, 14:36   #15
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Country: Luxembourg
Make: Karnic 2260
Length: 7m +
Engine: mercruises 1.7 120 d
Join Date: Mar 2012
Posts: 8
The car 1.7 DTI's have a modification for an automatic tensioner for the timing belt. Should I fit one of these to the mercruiser or should I fit the 'old' tensioner?
How do I mesure the tension? I've heard these engines have problems with belts that are too tight...
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