As seen in Speedboat Magazine’s
AUGUST 2022 Issue.

BBC Gen V & VI
Oil Bypass

Dear Bob:

Q. I have a question regarding the GM Gen V 454 block oil bypass when running an adapter on the oil filter mounting pad for a remote oil cooler and filter. There are 2 oil bypass valves in the engine block. Does either one of these valves need to be removed when running an adapter plate in the original oil filter location? Does either one of these valves need to be changed to a higher pressure valve? It is so confusing on the internet regarding information on this subject. I don’t want to make a mistake that will damage the engines that I am putting in my boat. I am restoring an older Scarab which originally had Mark IV engines, so I don’t have the original marine engines to compare them to. Thank you.

Chris Williams
Kansas City, KS

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As seen in Speedboat Magazine’s
JULY 2022 Issue.

29 FEVER Props

Dear Bob:

Q. I have a 2004 29′ Fountain Fever with twin 377 Mercury Racing Blue Scorpion engines. I am currently running Bravo 1 propellers that I had “lab finished.” The result is that I now have too much prop slip. At the peak rpm of 5,200, my boat can achieve 79 mph. I was considering the Bravo 1 FS 32″ pitch propeller. Is that a good option?

Justin Moscato
Minooka, IL

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As seen in Speedboat Magazine’s
JUNE 2022 Issue.

Water Flow
Restriction

Dear Bob:

Q. My boat is equipped with a MerCruiser 7.4L Bravo One package. I am having a high speed overheating problem and the local marina is having trouble figuring it out. They’ve replaced the raw water pump, thermostat, and exhaust risers, but the engine still overheats at higher rpm. Any suggestions you can provide would be awesome.
Thanks,

Todd Walker
Marina Del Rey, CA

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As seen in Speedboat Magazine’s
MAY 2022 Issue.

SEVERE Overheating

Dear Bob:

Q. I have a Formula 272 with a MerCruiser
502 Magnum engine coupled to a Bravo
III outdrive. The exhaust is routed through
the drive unit. It’s a freshwater lake boat.
I’m very meticulous and have used Mobil
1 oil since break-in completion. The engine
has had over the top maintenance in every respect. It now has about 350 hours of use.

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