Teague On Tech: Q & A with Bob Teague May 2023

As seen in Speedboat Magazine’s
May 2023 Issue.

525 SC Gen V 502
Conversion/Upgrade

Dear Bob:

Q. I have a 1991 20’ Four Winns Liberator.
Recently, I purchased a freshly built motor
that is a 502 Gen V Big Block with the
Mercury 525SC supercharger set up using the
Weiand 177 blower with a single Dominator carburetor. I installed the engine in the 4 Winns and after running it noticed that the oil was getting water in it. When I checked it out, I discovered that the intake gasket the engine builder used was squeezed out at the water passage close to the #2 intake port. The cylinder heads on the motor are an Edelbrock aluminum hard anodized head designed to replace the stock iron heads. They have old Crane stud girdles and I am not sure of what the valves and other components are. At this point, I want to check out the upper end and get the correct intake gaskets and sealers to re-assemble the motor. Any advice that you have would be helpful.

Brendan Riley
East Haddam, CT

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Teague On Tech: Q & A with Bob Teague April 2023

As seen in Speedboat Magazine’s
April 2023 Issue.

B&M SuperChiller

Dear Bob:

Q. I purchased a SuperChiller Intercooler to
put under my B&M 250 supercharger. Now
I’m having the oil from the supercharger’s
front gear case blow out the pinhole vent in
the fill plug on the top. I don’t believe I had
that problem last year when I ran just the
supercharger. The boost pressure went from 11psi down to 6psi (I expected a drop). Does the B&M supercharger need the vented fill plug? Or do you think there is an issue with the seals in the front of the supercharger?

Thanks for your time.

Thomas Stevenson
LeClaire, IA

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Teague On Tech: Q & A with Bob Teague March 2023

As seen in Speedboat Magazine’s
March 2023 Issue.

565 With XR DRIVE

Dear Bob:

Q. I have 2019 Nordic 29′ deck boat with a Mercury Racing 565 motor package that came with the XR drive. After 200 hours, my drive has failed. I am not sure what’s wrong with it yet because I have not had it taken apart for inspection.

Is this drive too small? should I consider changing to a different drive? Will I get more life out of a different drive? play on Lake Havasu.

David Hutcheson
Garden Grove, CA

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Teague On Tech: Q & A with Bob Teague Jan/Feb 2023

As seen in Speedboat Magazine’s
Jan/Feb 2023 Issue.

Nor-Tech
3600 Supercat

Dear Bob:

Q. I own a 2007 Nor-Tech SuperCat 36′ catamaran with Twin 1150s and Mercury Racing SSMVI drysump drives. The hull has notches in the running surfaces at the transom. I am running 37″-pitch to 40″-pitch props spinning out. What should my drives “toe” be set at? (To verify, “toe” is the measurement of the tips of nosecones being closer to or further apart than the center line of the propshafts.)

The boat does have an issue with porpoising, but as far as I’ve ever been able to find out, it is normal and to just deal with it! I’m a new cat owner coming from a vee, so I honestly did not know what to expect. I have been told that newer versions of the 3600 have the notched bottom and the older ones did not. The reason I say this is that I’ve also read
that it makes a difference whether you should spin propellers in or out. I’m sure you know what I’m talking about. You can see the “notch”, the drain plug, and water pickup if you look closely at the picture I included of my boat. Obviously, I would trust your opinion over anything I have read, so I appreciate the information.

David Guralnick
Portland, OR

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