How many hours are to many on a 496?
09-02-2015, 03:18 PM
#31
Registered
I have a 2000 7.4 MPI (non-MAG) and I would like to get every hour out of the engine as possible. I don't beat the snot out of it -- but it does get used (fresh water). I'm anal about the maintenance -- for example the flame arrestor gets washed out every two tank fills.
Your experience would be greatly appreciated.
Thanks
3pointstar
09-02-2015, 04:50 PM
#32
VIP Member
I bought the boat new in O1. I changed the oil every 25 hours and drive oil every 50 hours. I ran it pretty hard the first few years for sure.
I haven't had the boat for several years since I got the Gun but is went to a very good friend and then his brother that still has it.
As you can imagine when Rog got it he used the hell out of it also. Always fresh water. Always in my warehouse in winters so no need to winterize.
I am pretty sure it was Merc oil and filters all the time.
The Mags are different internals then MPIs I think.
Gimbals about every 300 hours.
Great motors
I haven't had the boat for several years since I got the Gun but is went to a very good friend and then his brother that still has it.
As you can imagine when Rog got it he used the hell out of it also. Always fresh water. Always in my warehouse in winters so no need to winterize.
I am pretty sure it was Merc oil and filters all the time.
The Mags are different internals then MPIs I think.
Gimbals about every 300 hours.
Great motors
09-02-2015, 06:20 PM
#34
Registered
iTrader: (8)
My VR had 378 hrs scanned on the stock 496 HO. 162 hrs at idle to 1499, 73 hrs 1499-2499, can't remember the rest but only .8 hrs at anything over 4500rpms. 155psi cold compression on all cylinders. Other than a bad IAC last year, it has been a very reliable turn key setup.
09-02-2015, 08:41 PM
#35
Registered
When I was looking for a twin black motor boat...3 of them had 496's with reversion issues. Not sure if it's the cam, exhaust design, etc...but all of them need to be rebuilt.
09-03-2015, 02:31 PM
#37
Registered
My guess would be tailpipe angle. Some hulls required the riser extensions. With any engine, if you don't get the exhaust right they can revert.
09-03-2015, 03:12 PM
#38
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Join Date: May 2006
Location: Huntsville, AL
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278 / 279 hours Hours on my twin 2002 496 Mags. over 85 was at idle before I got the boat.
Plugs where fouled, changed them and runs great. it does sut up my ass end though. way to rich.
we had a boat with a single carbed 454 Mag in a 260 over nighter searay , with over 1200 hours and still ran great.
Plugs where fouled, changed them and runs great. it does sut up my ass end though. way to rich.
we had a boat with a single carbed 454 Mag in a 260 over nighter searay , with over 1200 hours and still ran great.
