out-n-aboat
New Member
I have a 300 hp 454 with a bravo 2. Whats the difference in the blocks of the 350 h.p 454?
300 h.p vs 350 hp 454 mercruiser
- Thread starter out-n-aboat
- Start date
Daniel P Thomas
Member
- Nov 26, 2006
- 755
- Boat Info
- 1992 350 EB
- Engines
- Twin 454 Mercruisers 330 hp each
w/ Bravo II Drives
Good question
Mine says 330HP 7.4 L Bravo II
Mine says 330HP 7.4 L Bravo II
out-n-aboat
New Member
I meant 330 hp not 300. My salesman who sold me the boat called the 300 hp tuned down". Different cam mabey? I dont know.
out-n-aboat
New Member
how many hours on your 330's? What do you do for yearly maintance
sbw1
Well-Known Member
- Oct 10, 2006
- 8,185
- Boat Info
- This is listed in my signature
- Engines
- This is listed in my signature
330 HP Mercs went from 330 HP to 300HP around 1992 to 1993. Both engines were identical but due to a change in how HP was measured the numbers were changed. 7.4s of that era were 330 at the crankshaft and 300 at the prop. It's about that simple.
Daniel P Thomas
Member
- Nov 26, 2006
- 755
- Boat Info
- 1992 350 EB
- Engines
- Twin 454 Mercruisers 330 hp each
w/ Bravo II Drives
Out N About
My 350 EB is only about 30 hours new to me.
Boat was a repo in very good shape, but am taking no chances
I am in the process of going through all of the engine and mechanical systems.
Recently pulled both out drives and replaced exhaust bellows along with all related shifter rubbers and bearings. Not cheap, but preventative.
Also replaced impellers and exhaust backflow preventers.
Boat was a 'river boat' in MO and found a lot of sand.
Put new anodes on last week (thanks CSR for www.boatzincs.com cannot say enough great things about Bob there), Painted bottom and starting to buff and wax this weekend.
New GPS Chartplotter and Bennett Auto Tab Controls on this weekend,
Tuned up in Sept (plugs, wires, cap and rotor) New outdrive lube canisters (Sea Ray changed design so bought 2)
Will be pulling Carbs next weekend to be rebuilt (one seems to be running very rich)
Hoping that all ofmthis work/joy/fun /money will alow me to make an uneventful trip from the Southern End of Lake Michigan to Elk Rapids in MI for Great Lakes Gathering in July!
Dan
Sorry about the run on post
My 350 EB is only about 30 hours new to me.
Boat was a repo in very good shape, but am taking no chances
I am in the process of going through all of the engine and mechanical systems.
Recently pulled both out drives and replaced exhaust bellows along with all related shifter rubbers and bearings. Not cheap, but preventative.
Also replaced impellers and exhaust backflow preventers.
Boat was a 'river boat' in MO and found a lot of sand.
Put new anodes on last week (thanks CSR for www.boatzincs.com cannot say enough great things about Bob there), Painted bottom and starting to buff and wax this weekend.
New GPS Chartplotter and Bennett Auto Tab Controls on this weekend,
Tuned up in Sept (plugs, wires, cap and rotor) New outdrive lube canisters (Sea Ray changed design so bought 2)
Will be pulling Carbs next weekend to be rebuilt (one seems to be running very rich)
Hoping that all ofmthis work/joy/fun /money will alow me to make an uneventful trip from the Southern End of Lake Michigan to Elk Rapids in MI for Great Lakes Gathering in July!
Dan
Sorry about the run on post
Daniel P Thomas
Member
- Nov 26, 2006
- 755
- Boat Info
- 1992 350 EB
- Engines
- Twin 454 Mercruisers 330 hp each
w/ Bravo II Drives
Out N About
Forgot original question
When purchased in mid August engines had 475 hours
Genny 850 hours
Dan
Forgot original question
When purchased in mid August engines had 475 hours
Genny 850 hours
Dan
sbw1
Well-Known Member
- Oct 10, 2006
- 8,185
- Boat Info
- This is listed in my signature
- Engines
- This is listed in my signature
Daniel P Thomas said:
That was the original question? :smt017 Thought it had to do with horsepower difference.
AndersonAcres
Member
Dan, congrats on all the work and the progress. I envy you the heated storage.
