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Old 22-09-2010, 03:17 PM   #1
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Location: UK
Cruising area: Mallorca

Join Date: Aug 2010
Location: UK
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Mercruiser 5.LX

Hi all, I have a mercruiser 5.0 LX V8 and I have got to replace the ex manifolds and risers. I am going out to Mallorca to do the job and am trying to think of everything I will need. Could anyone tell me what size the screws are that bolt the manifold to the head so I can take an allen key with me and a tap to clean out the holes.
Thanks Breezer.

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Old 22-09-2010, 06:00 PM   #2
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Country: United Kingdom
Location: Dorset
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Interests: Driving boats fast, wakeboarding and boating to pub
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Boat make: Ring 20, 17ft Plancraft Sabre
Engines: Mariner 200 2.5, Yamaha 115 V4
Cruising area: Poole

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In most cases you wont have to clean out the holes, although the bolts maybe very corroded on the outside, the area of bolt screwed into the heads will, in the majority of cases remain very clean and corrosion free.You only really need a basic tool kit i.e imperial sockets, spanners and a selection of screwdrivers. I would take some wire brushes however and a can of paint to clean of any corrosion around the ports on the heads as these areas obivously arent accesible with the manifolds in place. To keep the new manifolds looking clean and rust free at the joints it does pay to slightly overspray the joints with some decent quality black paint to slow down any corrosion on gasket faces. Oli
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