Life expectancy of Mercury 1075’s
#2
Registered
93 octane. There is a computer program to run 89 but it really limits the horsepower. If you take care of them the bottom ends go 300hrs and the valve train 150hrs(springs, rockers, lifters, guides, valves). oil change every 20-25hrs. and check the valve lash. Have the fuel injectors cleaned/tested every winter. they are an excellent engine
Last edited by 47EXCALIBUR; 10-04-2018 at 09:22 AM.
#4
Registered
#6
Registered
93 octane. There is a computer program to run 89 but it really limits the horsepower. If you take care of them the bottom ends go 300hrs and the valve train 150hrs(springs, rockers, lifters, guides, valves). oil change every 20-25hrs. and check the valve lash. Have the fuel injectors cleaned/tested every winter. they are an excellent engine
#7
Registered
They "mercury" call it a 1025 hp tune for 89 but its closer to the 850-900 range. Uses more fuel. As far as longer lasting? everything is cycle time, how many rpm for how many hours regardless. My friends OL w 1075 has two computers on the engine. one for 89 the other for 93 just in case he cant get premium. There is a big difference in acceleration and top end mph.
#10
A service manager of a platinum Mercury service center once told me: "these are basically race motors, guys who buy them don't realize that most race motors need to be serviced frequently"