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bigger they are the more power they make "mild" sooo 706's with big chief heads and 14-71's might push moby to 90 and last 60 hours lol
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A 1075 merc is prolly the highest maintenance sub 1100hp motor out there compared to other builders motors with the same hp
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Originally Posted by lil red
(Post 3575621)
bigger they are the more power they make "mild" sooo 706's with big chief heads and 14-71's might push moby to 90 and last 60 hours lol
;) There's a reason Merlin(WP) doesn't make the super-tall decks anymore...:coolcowboy: |
Originally Posted by 302Sport
(Post 3575623)
A 1075 merc is prolly the highest maintenance sub 1100hp motor out there compared to other builders motors with the same hp
The problem is the solid lifters.why they put a race valve setup in that motor is moronic....they shift, they run great, except the maintenance....converting to hydraulic...but that's why the new QOHC make everything obsolete... |
i'd put them in gear and they'd puke off the transom !!lol
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As mentioned Frank, it's the valve train in the 1075's that make them such a maintenance nightmare. While mine have similar components, I have a lighter double spring setup that runs lighter seat pressures, so I can get away with a little longer time between top end tear downs. At the end of the day it's always a crap shoot when you're going to spit a lifter, spring, valve, etc with mechanical lift cams, so you never know. It's a lot cheaped to do preventative top end tear downs to be safe. I'm going to do my top ends before the boat goes back in the water...
The bottom ends can last hundreds of hours, or go 10... It all depends on your parts, how well they were put together, and how they are maintained/treated. Obviously the more power they make (not how much they are cabable of making) can be a huge determining factor of have long the bottom ends will last. A bottom end that's capable of handling 1200 but never sees any boost or high RPMs could last a lot longer than a lower output engine that's constantly at 5000+ RPMs and getting hammered... So there are a lot of factors in how long engines will go between complete rebuilds. Btw, yours were built by a decent builder and babied for a lot of years, so its no suprise they lived to see so many hours. |
Originally Posted by SS930
(Post 3575655)
As mentioned Frank, it's the valve train in the 1075's that make them such a maintenance nightmare. While mine have similar components, I have a lighter double spring setup that runs lighter seat pressures, so I can get away with a little longer time between top end tear downs. At the end of the day it's always a crap shoot when you're going to spit a lifter, spring, valve, etc with mechanical lift cams, so you never know. It's a lot cheaped to do preventative top end tear downs to be safe. I'm going to do my top ends before the boat goes back in the water...
The bottom ends can last hundreds of hours, or go 10... It all depends on your parts, how well they were put together, and how they are maintained/treated. Obviously the more power they make (not how much they are cabable of making) can be a huge determining factor of have long the bottom ends will last. A bottom end that's capable of handling 1200 but never sees any boost or high RPMs could last a lot longer than a lower output engine that's constantly at 5000+ RPMs and getting hammered... So there are a lot of factors in how long engines will go between complete rebuilds. Btw, yours were built by a decent builder and babied for a lot of years, so its no suprise they lived to see so many hours. |
Power doesn't kill motors, revs do...:coolcowboy:
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Lil red, ill trade you my boat for her straight up...
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302: I was offering the avatar guy, and a ride in the Outerlimits for her straight up..I figured red might like it now that he's just the "Cigarette" bandits hahah
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