Griff

Never heard of a Hawk 575. Do they have original decals???

frickstyle

Griff,

No "Hawk 575" decals present on engines. Only the Hawk World Champion Supercharged stickers on the flame arrestors. The valve covers just have the Hawk emblem on them.

Really I am speaking of what I was told from the previous owner. I was looking at old original dyno sheets from Hawk Marine at Fort Apache, reported 576 HP @ 5200 with the B&M 250s. This may have been an upgrade "one-off" built at Hawk that was arranged by the owner, I can't really speak on that one.

Keytime

FWIW, I inquired on a '95 Powerplay that is supposed to have 575 Hawk engines. Below is a pic of them.

frickstyle

That would be the same exact setup that came with my TG. I would say that is correct as far as I can tell from the picture.

lvnspeed

525 = 420 with a 174 B&M blower single carb
575 = 420 with a 250 B&M blower Dual carb sometimes called 600's too.

There were tons of 525 set ups built. There were a few of 502 set ups with 174 setups but they were hit or miss if they stayed together (502 setups).

bolth were built on stock Merc Motor that were Brand NEW!

FYI I used to work at Hawk and I built a ton of these motors. I was there when the splatter paint of the motors was just getting started and the 1000 NA MOUNTAIN motors were built. I was there in 1991 -1997.

Unlimited jd

iTrader: (5)

Chris good talking to you yesterday, thanks for yet another history lesson! See ya soon!

caseyh

How can you tell a 420 from a 502?

caseyh

Roca marine said they were 502s (hawks) in that boat! And had issues but new blower fixed them. Or is it what was stated above the 502 the issue?

4bus

iTrader: (4)

The 420 is 454 based. On the back of the block below the head you will see a rather larger 7.4l casting mark on a 454

Keytime

Yep, I believe you're right. I'd definitely want to investigate that further to determine if the issues were taken care of. Hmmm.