SoCal Jet Boats
Discussion => The No Wake Zone => Topic started by: TooSober on March 30, 2016, 11:49:52 AM
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I just picked up a new exhaust and getting rid of the logs. I now need 4" Vs. the 3" that is currently on the boat. so my question is how do I cut a clean hole in the transom to start. I found a drill guide online but I don't see anyway of holding it straight without bolting in on. also I know this may sound dumb but what about adding a couple layers of exhaust hose to the current tips to bring them to 4". thanks for the help
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You could try to put a piece of wood over the hole and use a hole saw with a pilot bit
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Use a hole saw. Draw a circle where u want the hole. Use your drill and hole saw and start with very light pressure. Try to be as square/flat as possible. Be very patient. As soon as u get that initial groove, then u can add a little pressure. Try and stay square from beginning to end. I did this exact thing with great results. Good luck.... PATIENCE!
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Helps if you start out with the drill in reverse until you get you a nice score line through the gel... Then you can go at it a little more aggressive...
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You can use stainless reducers if you don't want to cut the holes bigger.
http://www.hardin-marine.com/c-1319-reducers.aspx
I believe Phil (RushinEliminator) has a used set for sale too.
I have used the reducers on another project because the 3" tips were right up against the swim steps. Easy breezy install. Problem solved
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I have these...
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cost?
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$65
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Reducers would work if you have the room. Keep in mind that there will be 4 extra hose clamps in there now. If it were me I would drill the transom out to 4" and install new tips. It can be done like everyone has said. Just go slow and measure several times before you get after it with the hole saw!
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Drill your pilot hole, then start the whole saw backwards to get a score in the gel so it doesn't chip
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Just patience. It can be done. Nice and easy. Mark the citcke and be steady. Larger tips look cooler anyways!
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Just out of curiosity why would it matter that i would need 4 more clamps?
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what about these from O'reilly's......
http://www.oreillyauto.com/site/c/detail/WAL0/41563/N1560.oap?ck=Search_exhaust+reducer_N1560_1302163_4927&keyword=exhaust+reducer&pt=N1560&ppt=C0233 (http://www.oreillyauto.com/site/c/detail/WAL0/41563/N1560.oap?ck=Search_exhaust+reducer_N1560_1302163_4927&keyword=exhaust+reducer&pt=N1560&ppt=C0233)
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If I understand yor post correctly, you want to take your existing 3" exhaust hole and enlarge them to 4". If that's the case, you can take your large hole saw mandrel and screw on the 4" hole saw. Then scew on the 3" inside the 4". The 3" will stick out just enough to act as a pilot for the 4". I tried to attach a picture, but I don't think it came out to good.
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That's an awesome idea!!!
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If I understand yor post correctly, you want to take your existing 3" exhaust hole and enlarge them to 4". If that's the case, you can take your large hole saw mandrel and screw on the 4" hole saw. Then scew on the 3" inside the 4". The 3" will stick out just enough to act as a pilot for the 4". I tried to attach a picture, but I don't think it came out to good.
Winner!!!
Sometimes the easiest solutions are right in front of you...
Dan'l