im finding out more info around every corner,first these are 588c.i,tall deck engines,built in 1990 by ''sonny leonard'' for hawk marine,they built 33 engines
1.,9.6 to 1 comp
2.,dart pro 1 heads 395's[yes they only make 345's,but these have been ported and polished] ,114 cc chambers,2.350in,1.90ex valves
3., crane cams mech roller, .735 lift,262/274 dur,on 107,.022 lash
4.,cola cranks
5.,carillo h-beam rods
6.,je pistons ?
7., sar/dart intakes[ported and polished,to match heads]
8., holley 1250cfm reworked by ''sonny leonard'' to 1350cfm
9., 32 degs of timing

this is all ive found,anybody have anymore info ?

Lot's of better ways to make power. The cylinder heads and carbs are too big for that combo.

im just passing on the info,its taking me a long time to find ,just the little info,for any other hawk owners

I understand... If you ever do any upgrades I can help. There is a easy 100 horsepower to be gained @ the same compression ration.

what do you recomend ?

I would like to know the same for a Hawk 525. I was told it was a 454, but saw online under a SEC filing for the company, they have it listed as 496.

If anyone has the specs i would appreciate it.

I use to do alot of machine work for Hawk if the cranks have a 3-4 digit number in the front of the snout they may have been machined by us for Hawk just before they closed. As far as I knew all engine assembly and dyno tune was done in house or that's what they claimed Bud that was the man in charge was a good friend of mine. Sincerely Laz Mesa
www.mesabalancing.com

If I remeber correctly the Hawk 525 was basically a MERC 420 (454) with a B&M 174 on top, I think the carb was a Holley 850. Higher comp than MERC 525SC. I built 2 out of my old 420īs reliable turnkey motors.

bl

my 588''-750's were built by ''sonny lenard'',,they built 33-588'' engines in 1991 for hawk marine

From what i know about mine, it has a B&M 240 & a single Dominator 1050. This weekend i will be back down at the boat & will take more pics. But have no clue on the internals.