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TOPIC: OMC Mystery Hole

OMC Mystery Hole 3 months 1 week ago #143021

  • Nautilus
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What I know about OMC stringer outdrives will fit in a thimble. Can anybody tell me what this 1" hole is for on the rear of an OMC stern drive? It must do something but it's a mystery to me. Thanks

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Website: NautilusRestorations.com

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OMC Mystery Hole 3 months 1 week ago #143023

Exhaust relief port.

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OMC Mystery Hole 3 months 1 week ago #143026

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Excellent! Thanks! Since I've routed the exhaust through the transom, I have another use for that hole.

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Website: NautilusRestorations.com

Mentor to the unenlightened!

"Never allow logic to interfere with a boat purchase." - J. S. Hadley
"Vintage quality beats new junk every time." - J. S. Hadley
"Anything supposed to do two things does both of them half-assed." - J. S. Hadley
"Success makes...

OMC Mystery Hole 3 months 1 week ago #143036

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The OMC Dual Deluxe resto-mod has twin OMC 120's with the exhaust routed through the transom. I converted the steering to cable using an OMC ball joint set-up. The exhaust relief holes were the perfect size to tap out for 3/4" pipe. I used brass 3/4" x 1/4" bushings which I drilled out to 1/2" in order to mount stainless Heim joints which now connect the two outdrives with a 1/2" x 1" x 24" piece of aluminum bar stock, polished of course. Looks good, works fine.





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Website: NautilusRestorations.com

Mentor to the unenlightened!

"Never allow logic to interfere with a boat purchase." - J. S. Hadley
"Vintage quality beats new junk every time." - J. S. Hadley
"Anything supposed to do two things does both of them half-assed." - J. S. Hadley
"Success makes...

OMC Mystery Hole 3 months 1 week ago #143038

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Looks excellent! What a sweet combo you are cooking up. Nice engineering job!

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Dr.Go!

OMC Mystery Hole 3 months 1 week ago #143040

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Engineering is a kind word. Rube Goldberg would be proud of me.

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Website: NautilusRestorations.com

Mentor to the unenlightened!

"Never allow logic to interfere with a boat purchase." - J. S. Hadley
"Vintage quality beats new junk every time." - J. S. Hadley
"Anything supposed to do two things does both of them half-assed." - J. S. Hadley
"Success makes...

OMC Mystery Hole 3 months 1 week ago #143044

Yep outstanding!!!!!! Looks even better in person. ;)

Bob

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OMC Mystery Hole 22 hours 35 minutes ago #143577

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I had not seen this post! Really perfect. The boat will be beautiful!

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