| Title: | Powerboats |
| Notice: | Introductions 2 /Classifieds 3 / '97 Ski Season 1267 |
| Moderator: | KWLITY::SUTER |
| Created: | Thu May 12 1988 |
| Last Modified: | Wed Jun 04 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1275 |
| Total number of notes: | 18109 |
At the Annapolis boat show this year, almost all the deep-V performance
boats had a new engine in them, 500 mercruiser magnums.
Anyone know anything about these??
Are they 500 cubic inch or 500 hp?
Is this a different block or just mods to an existing one?
Hows reliablity?
What sort of lifespan can you expect out of these, it always goes down
as the ponies go up :(
Last but not least, has anyone priced them?
Garrison.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1245.1 | 502 cu inch | BIRDIE::JGREEN | Living beyond my emotional means | Tue Dec 19 1995 12:05 | 6 |
It's probably the 502 cu inch big block that Merc came out with a few
years back. Fuel injected I believe. HP is likely in the high 300's, or
low 400's. You just don't see one hp per cubic inch in any motor that
won't spin above 4500 rpm. Torque is a different matter..... :^)
~jeff
| |||||
| 1245.2 | MY GUESS . ME CETRIFIED MERCRUISER TECH :>) | FABSIX::J_KASPER | Tue Dec 19 1995 21:23 | 38 | |
THE 350 MAG, THE 454 (7.4L) MAG UP TILL THIS YEAR HAVE BEEN CARBURATED A LITTLE HIGHER HP THEN THE REGULAR 5.7 AND 7.4'S APPROXIMATELY 30 HP I WOULD ASSUME THAT THE 500 MAG IS THE SAME WITH RESPECT TO THE 502 AS J_GREEN MENTIONED. GENERALLY THE ONLY AND I MEAN THE ONLY DIFFRENCE IS INTAKE AND CARB CALLIBRATION I KNOW THAT FOR '96 THAT THE 5.7 MAG IS NOW FEUL INJECTED AND RATED AT 300HP AT MOTOR. I AM NOT SHURE ABOUT THE 7.4 MAG ALLTHOUGH IT IS OFFERED IN FEUL INJECTED AND CARBURATED. I WOULD ASSUME THE 500 MAG IS THE 502 AND IS PROBABLY 30 OR SO MORE HP THAN THE STANDARD 502 CU.IN. MOTOR. I HAVE SEEN THE 502 500HP IN A COUPLE OF DIFFERENT BOATS (FOUNTIANS CIGARETE ETC) THEY WERE HOLLY 850 CARBERATED ( THERE ACTUALLY WERE 2 IN ONE 38 FT BOAT :>)======1000HP!!!!!!! 1200 WATT KICKER STEREO &%&$&%@) BASED ON WHAT I REMEMBER ABOUT BIG HP MERC MOTORS THE HIGHER THE HP THE LESS THE WARRENTY. THEY KNOW THAT ANY ONE WHO BUYS ONE OF THESE MOTORS IS NOT USUING IT TO GO BASS HUNTING IN THE LOCAL SWIMMING HOLE. THE 4600-4800 RPM MAX IS THERE TO HELP IN THE LONGEVITY AND RELIABILTY. MOST AUTO PRODUCTION ENGINES RED LINE AT APPROX. 5500RPM BUT THEY ARE NOT RUN AT THAT RPM ALL DAY LIKE BOAT ENGINES ARE. I WILL TRY TO GET AHOLD OF THE MERC ENGINE STAT. BOOK FOR '96 J_KASPER | |||||