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

Rivers & creeks

Rivers & creeks

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The Eber exhaust fitting is angled between the plate and the tube, and we have a very thick hull. I can see how an oval hole would help but Jewsons had sold out of their oval hole cutters :D

No way of filing it to that shape, so do I drill it at an angle? We're out of the water at the moment if that helps.
 
Here's how I do it and I used to do it a lot, long siries drill bit as a pilot (same size as hole cutter centre drill) replace the hole cutter drill bit with tool steel rod and off you go, I found that using the rod rather than keeping the drill bit stops the cutter wandering as the drill bit can also cut sideways. I say used to as I now try to use the new skin fitting that only needs a round hole but still has the upswept angle of exhaust stub for gooseneck etc, a much nicer piece of kit all together if you can get hold of one.
 
Lazy Kipper said:
The Eber exhaust fitting is angled between the plate and the tube, and we have a very thick hull. I can see how an oval hole would help but Jewsons had sold out of their oval hole cutters :D

No way of filing it to that shape, so do I drill it at an angle? We're out of the water at the moment if that helps.
Click to expand...

It's in this months (January!?) PBO I think.
 
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I've just done this job. I made up a paper template using measured diameters, stuck it to the transom in the appropriate position and used a jigsaw. I finished off with a B&D Wizard (a half round file would also work) to put an angle on the top and bottom of the new hole to match the slope of the tube.
 
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Just drill the hole with the correct diameter hole saw at 90 degrees to the surface, then place the tip of the holesaw into the hole for a second cut at the angle you need. Once you have the initial hole it is better to remove the pilot drill and you can make the hole any shape you want more or less. With really thick material you will have to do it in stages, removing the resulting wedge as you go.
 
Make template of the angle. Drill a pilot hole at that angle. Fit rod into hole saw arbor and use the pilot hole as a guide. This gives you a perfect angled hole and is how the Eberspacher instructions tell you to do it. Or read it in PBO. It's a very easy job.
 
PCUK said:
Make template of the angle. Drill a pilot hole at that angle. Fit rod into hole saw arbor and use the pilot hole as a guide. This gives you a perfect angled hole and is how the Eberspacher instructions tell you to do it. Or read it in PBO. It's a very easy job.
Click to expand...
What like what it says in post 2?:D
 
I put a cotton reel which had a 6mm hole & correct diamerter inside the eber skin fitting (perfect fit) then put the face of the skin fitting on the transom (the correct angle for my pilot hole) then drilled through the skin fitting & cotton reel with long 6mm drill. This gave me correct lead for hole saw. Needed to file the resulting hole a little to get the skin fitting to sit flush but the job was a good un! Good luck. Let us know which method you use.
 
Lazy Kipper said:
The Eber exhaust fitting is angled between the plate and the tube, and we have a very thick hull. I can see how an oval hole would help but Jewsons had sold out of their oval hole cutters :D

No way of filing it to that shape, so do I drill it at an angle? We're out of the water at the moment if that helps.
Click to expand...

A circular cutter drilled through with a guide to get the angle....easy.
 
This was the hardest bit of my install. I didnt make it steep enough and had to file it out to make it fit. 45deg is steeper than it looks even using the rod supplied with the kit

It was made harder by having to sit on the pontoon and stretch to reach the transom. I also had a slight curve to the transom that meant it didnt quite sit flush, not much of a curve luckily
 
PCUK said:
Make template of the angle. Drill a pilot hole at that angle. Fit rod into hole saw arbor and use the pilot hole as a guide. This gives you a perfect angled hole and is how the Eberspacher instructions tell you to do it. Or read it in PBO. It's a very easy job.
Click to expand...

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.
 
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.
Click to expand...

Well yes you need the correct tool like this http://img830.imageshack.us/img830/1836/holecutter.jpg but with longer pilot and a simple cardboard template to get the angle.
 
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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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