How do I drill an angled hole for an Eber exhaust?

davidwf said:
To get the correct angle I placed the fitting on the outside of the hull, outside of the fitting flat to the grp with the exhaust pointing down, then your angle is the same as the exhaust, line up pilot drill alongside the exhaust and away you go.

Sounds more complicated than it is.

Please don't use a multi cutter tool, buy the correct size from someone like Axsminste.r I use the Bosch range and over the years have built up a collection. They all use the same quick change arbor.
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Thanks - sorry to be a numpty but dosen't the exhaust angle upwards so that water can't flow down into it?
 
Playtime said:
I'm sure this works well if you've got a long single hole cutter of the right size. If you only have the multiple blade hole cutter with the large diameter blade carrier you'll find that the blade is not long enough before the blade carrier hits the transom. That's why I used a jigsaw which worked well.

The actual size (and shape) of the hole is none critical as there is plenty of margin for error before the fixing holes are threatened.
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Proper hole saws aren't in carriers, they're in arbors that don't stop it entering the hole!:o
It's only the cheap woodworking ones that fit in carriers and they are not suitable for this job.
 
Heavens to Murgatroyd - I only asked how a cardboard template could help, now I'm accused of not believing the forum expert. So to wrench this back on track, could someone explain how I would use a cardboard template - note this is suplemental to my wholehearted acceptance of post number 2 which I very much believe or should I say "believe! :rolleyes:". Fortunately I've got a hole saw as described rather one in a carrier - no doubt discovered by others from experience.
 
Lazy Kipper said:
Heavens to Murgatroyd - I only asked how a cardboard template could help, now I'm accused of not believing the forum expert. So to wrench this back on track, could someone explain how I would use a cardboard template - note this is suplemental to my wholehearted acceptance of post number 2 which I very much believe or should I say "believe! :rolleyes:". Fortunately I've got a hole saw as described rather one in a carrier - no doubt discovered by others from experience.
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Scan0002-1-1.jpg


PS i am not a naval architect :p
 
davidwf said:
To get the correct angle I placed the fitting on the outside of the hull, outside of the fitting flat to the grp with the exhaust pointing down, then your angle is the same as the exhaust, line up pilot drill alongside the exhaust and away you go.

Sounds more complicated than it is.
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Lazy Kipper said:
Thanks I see what peeps mean now. But why angled downwards rather than up?
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It must be Friday evening and the brain is worn out, but this leaves ME somewhat baffled too.

With the fitting reversed and held flat to the topsides and the 45 degree angles exhaust pointing downwards davidwf, are you suggesting using that angle to line the drill to? In which case the angle your would be drilling at would be upwards - not down as in Sailorman's diagram!

I wonder if there are different angles to differing fittings which is confusing me? - Mine is a straight 45 degree fitting (the second one below), but I have seen them like this:

http://compare.ebay.co.uk/like/3305...ixedPriceItemTypes&var=sbar&adtype=pla&crdt=0


and like this:

http://compare.ebay.co.uk/like/2809...ixedPriceItemTypes&var=sbar&adtype=pla&crdt=0


Would that make any difference?
 
Jabamusic said:
It must be Friday evening and the brain is worn out, but this leaves ME somewhat baffled too.

With the fitting reversed and held flat to the topsides and the 45 degree angles exhaust pointing downwards davidwf, are you suggesting using that angle to line the drill to? In which case the angle your would be drilling at would be upwards - not down as in Sailorman's diagram!

I wonder if there are different angles to differing fittings which is confusing me? - Mine is a straight 45 degree fitting (the second one below), but I have seen them like this:

http://compare.ebay.co.uk/like/3305...ixedPriceItemTypes&var=sbar&adtype=pla&crdt=0


and like this:

http://compare.ebay.co.uk/like/2809...ixedPriceItemTypes&var=sbar&adtype=pla&crdt=0


Would that make any difference?
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it was a very quick sketch to show the principle. Adapt as req :p
 
Jabamusic said:
I wonder if there are different angles to differing fittings which is confusing me? - Mine is a straight 45 degree fitting (the second one below), but I have seen them like this:

http://compare.ebay.co.uk/like/3305...ixedPriceItemTypes&var=sbar&adtype=pla&crdt=0
Would that make any difference?
Click to expand...


That is the Webasto one that referred to in post 2, and the one I now use in all my installs as there is no need to cut the hole at an angle but the exhaust still points upward for a gooseneck, simples.
 
PCUK said:
Proper hole saws aren't in carriers, they're in arbors that don't stop it entering the hole!:o
It's only the cheap woodworking ones that fit in carriers and they are not suitable for this job.
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Thanks for pointing that out. I obviously wasn't clear enough in my post. :rolleyes:
 
single said:
I give up on this thread, such an easy task and all this fuss and some suggestions are whong anyway.Just buy a 'proper' hole cutter and do it. Takes about 10mins:rolleyes:
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I think you may have had a minor humour bypass, we've been in irony mode since the middle of page 2 - least I hope we have, otherwise that guy suggesting I drill it from Australia has a very long drill bit - or maybe he's just bragging?
 
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