10 year old merc 575sci engines with zero run time, concerns?
09-24-2012, 03:05 PM
#31
Registered
I would have a hard time not switching to roller cams while you have the mills apart. Because with my luck at 100 hours I'd lose a lobe or two off of one of the cams and be kicking myself in the a$$ for not making the switch while the motors were out of the boat.
09-24-2012, 03:19 PM
#32
I did head gaskets and the cam broke. Do cams.
.030 over, cleaned head and block surfaces(pistons are .010 below deck at TDC, Crane 16HR00110 cam I .610 298* and E .632 306*, Chillers, 3.5 pulley, stock ECU and ignition, 200 hours, 704HP. No black soot, no melted pistons. Dyno fuel #'s were great and the engine was still making power when the limiter kicked in.
.030 over, cleaned head and block surfaces(pistons are .010 below deck at TDC, Crane 16HR00110 cam I .610 298* and E .632 306*, Chillers, 3.5 pulley, stock ECU and ignition, 200 hours, 704HP. No black soot, no melted pistons. Dyno fuel #'s were great and the engine was still making power when the limiter kicked in.
09-24-2012, 07:09 PM
#33
Registered
09-24-2012, 07:12 PM
#34
Registered
My cam just fricken broke. Fortunately it was in front of the last two lobes so those two valves shut and the rest stayed in time. Of course the engine died because the distributor wasn't turning.
09-25-2012, 07:23 AM
#36
just 104 huh? 
Are you side by side or semi staggered?
What drives? Props? I must know more!
With the changes you made do you feel the drivability issues were resolved keeping the stock ECU? My issues on both are super rich, high idle after runs, long warm up time with loading up.
Thanks
Are you side by side or semi staggered?
What drives? Props? I must know more!
With the changes you made do you feel the drivability issues were resolved keeping the stock ECU? My issues on both are super rich, high idle after runs, long warm up time with loading up.
Thanks
09-25-2012, 07:46 AM
#37
Registered
iTrader: (1)
I did head gaskets and the cam broke. Do cams.
.030 over, cleaned head and block surfaces(pistons are .010 below deck at TDC, Crane 16HR00110 cam I .610 298* and E .632 306*, Chillers, 3.5 pulley, stock ECU and ignition, 200 hours, 704HP. No black soot, no melted pistons. Dyno fuel #'s were great and the engine was still making power when the limiter kicked in.
.030 over, cleaned head and block surfaces(pistons are .010 below deck at TDC, Crane 16HR00110 cam I .610 298* and E .632 306*, Chillers, 3.5 pulley, stock ECU and ignition, 200 hours, 704HP. No black soot, no melted pistons. Dyno fuel #'s were great and the engine was still making power when the limiter kicked in.
09-25-2012, 10:48 AM
#38
Registered
Semi-stagger
Tall windshield
Anchor, 5' chain, 100' line
No porti-potti
2 people, full of fuel
SCX-4
16.8" 5bl 38P 16* Hering 104 @5200
17" 5bl 35P 16* Hering 100 on limiter @5400
w/chillers and 3.5" pulley, 4# boost
stock plugs, wires, ECU, limiter, timing, etc.
Every once in awhile it'll load up a little but clears out easily and never covers the back of the boat in soot. Even before I ever touched the engines.
705 ft lbs @ 3200
745 @ 4400
718 @ 4900
609 HP @ 4300
699 HP @ 5450 as limiter kicked in
BSFC .45 @ 4000RPM-4500
avg .48 to 4800
avg .50 to 5200
.45 @ 5400
Tall windshield
Anchor, 5' chain, 100' line
No porti-potti
2 people, full of fuel
SCX-4
16.8" 5bl 38P 16* Hering 104 @5200
17" 5bl 35P 16* Hering 100 on limiter @5400
w/chillers and 3.5" pulley, 4# boost
stock plugs, wires, ECU, limiter, timing, etc.
Every once in awhile it'll load up a little but clears out easily and never covers the back of the boat in soot. Even before I ever touched the engines.
705 ft lbs @ 3200
745 @ 4400
718 @ 4900
609 HP @ 4300
699 HP @ 5450 as limiter kicked in
BSFC .45 @ 4000RPM-4500
avg .48 to 4800
avg .50 to 5200
.45 @ 5400
09-25-2012, 05:34 PM
#39
4bus glad your enjoying your boat! 38 fountain is on my wish list if I ever get back into big blocks. I'm very happy with my outboards. Post some pics of that bad boy!!!
PS. are you going to paint the engines green this winter? You know I got the paint if you need it Gotta have some fun.
Congrats with the boat bud!
PS. are you going to paint the engines green this winter? You know I got the paint if you need it
Gotta have some fun. Congrats with the boat bud!
09-25-2012, 09:04 PM
#40
Registered
iTrader: (3)
4bus glad your enjoying your boat! 38 fountain is on my wish list if I ever get back into big blocks. I'm very happy with my outboards. Post some pics of that bad boy!!!
PS. are you going to paint the engines green this winter? You know I got the paint if you need it Gotta have some fun.
Congrats with the boat bud!
PS. are you going to paint the engines green this winter? You know I got the paint if you need it
Gotta have some fun. Congrats with the boat bud!
