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Forum: Swap Shop

10-15-2024, 10:42 AM

Replies: 0

427 mercruiser standard and opposite rotation

Views: 620

Posted By Farnswj

427 mercruiser standard and opposite rotation

I have a 1974 Brunswick Concord equipped with two BBC 427 mercruisers, both are running engines. the drives are 70 series Velvets. I am checking to see if there is anyone intetested in these...

Forum: Electronics

02-05-2021, 06:13 PM

Replies: 1

1974 inboard Mercruiser HEI retrofit...tach rewire question

Views: 537

Posted By Farnswj

1974 inboard Mercruiser HEI retrofit...tach rewire question

I compltely gutted the Thunderbolt ignition system, and replaced it with GM marine HEI distributors...engines run fine. I would like to find out any compatibility info. on my existing tachs. Is the...

Forum: General Q & A

11-24-2020, 04:37 AM

Replies: 4

fuel comsumption for 35' Concorde with twin 427 mercs.

Views: 1,427

Posted By Farnswj

This boat is located inland right now, but i may...

This boat is located inland right now, but i may be making the trip to the coast...it came off of Lake Michigan, where it was used as a state authority boat previously. It has big props, and rolls...

Forum: General Q & A

11-22-2020, 05:51 PM

Replies: 4

fuel comsumption for 35' Concorde with twin 427 mercs.

Views: 1,427

Posted By Farnswj

fuel comsumption for 35' Concorde with twin 427 mercs.

I recently completed rebuilds on my 427 mercs, which included installing hei ignitions. I am looking for any gph input you folks might have achieved at 1000 rpm cruising speeds. My boat is a 1974...

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