How much horsepower does a Mercruiser 454 have?
Mercruiser Big Block 7.4L V8 Marine Engine Product Specifications
| Models | 7.4L MPI | 454 Mag MPI |
|---|---|---|
| Propshaft Horsepower (SAV1 Rating) | 3101 (2752) | 3851 |
| Propshaft Kilowatts (SAV1 Rating) | 2311 (2052) | 2871 |
| Displacement | 454 cid (7.4 l) | |
| Maximum rpm @ WOT3 | 4200-4600 rpm | 4600-5000 rpm |
How many liters is a 454 Mercruiser?
Performance Specs
It is a large engine with 454 cubic inches (7.4 liters) of displacement.
How many horsepower is a 7.4 Mercruiser?
7.4L (454ci) Base Marine Engine, 385 HP.
How much oil does a 454 MerCruiser hold?
I’ve owned a number of boats with 7.4/454 engines, and the owner’s manuals say 7 quarts which is also the case with Chevy trucks I’ve owned. The Chevy’s always came to the full mark on the stick after adding 7 quarts. Problem is, 5 quarts is what it takes to bring the oil level to full on a MerCruiser.
How much torque does a 454 MerCruiser have?
Mercruiser Big V8 Marine Engine Fastener Torque Spec’s
| DESCRIPTION | Lb. Ft. | N.m |
|---|---|---|
| Remote Oil Connector (1/2 in x 13) | 25 | 34 |
| Rocker Arm Cover | 10 | |
| Rocker Arm Bolts 7.4L/454 454 Magnum/502 | 40 | 54 |
| 45 | 61 |
How much oil does a 454 marine engine take?
Most stock 454’s hold 5 qts.
What does MPI stand for MerCruiser?
Multi-Port Fuel Injection
Multi-Point Fuel Injection or Multi-Port Fuel Injection (MPI) – This refers to a fuel system that uses a fuel injector at every intake port of the engine.
How do you change the oil on a 454 MerCruiser?
HOW TO: change the engine oil and filter in your Mercruiser 7.4 454
What oil does a MerCruiser engine take?
MerCruiser Oil Specs
The manufacturer recommends that its own MerCruiser SAE 20W-40 Full Synthetic Engine Oil be used.
Are 454 engines reliable?
Both the 350 or 454 are great reliable engines and going with either one of them would be great for a classic American sports car.
How many hours is a Marine 454?
You should be able to get 1500 plus out of those engines if maintained properly.
What oil should I put in my 454?
If you can’t find the owner’s manual, General Motors highly recommends 10W-30 oil for the 454. You can choose either a synthetic blend of fully synthetic oil as long as the SAE rating is 10W-30.
How many quarts of oil does a 454 engine hold?
Original manual says 12 quarts + 1 for filter
My original manual says the 454 takes 12 quarts plus another for the filter. A total of 13 quarts!
How many hours does a MerCruiser last?
Re: typical engine life on mercruiser
Assuming regular maintenance done by a reputable professional, and assuming the boat gets used regularly and doesn’t sit around for long periods of time, and you don’t run all day at WOT, 1200-1500 hours should be easy to achieve.
Does GM make MerCruiser engines?
They primarily design manufacture and produce marine specific motors, the largest sector being outboard engines. It also produces the MerCruiser line of sterndrives and inboard motors.
…
Mercury Marine.
| Type | Division |
|---|---|
| Website | https://www.mercurymarine.com/ |
What oil should I use in my 454?
What is the difference between Mercury and Quicksilver oil?
Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement parts and accessories. The two brands share the same DNA and same brand promise. The main differences between the two brands is where they are sold and the larger breadth of products available under the Quicksilver brand.
What year is the best 454?
1970
The 1970 versions of the Chevrolet 454 were the most powerful, with the LS5 putting out around 360 horsepower and the LS6 delivering about 450 horses.
What engine is better 350 or 454?
When it comes to the battle of 454 vs 350 engines, both are classic engines from Chevrolet and are great for high power production that is a great fit in so many classic cars and trucks. The 454 is better in terms of horsepower, but the 350 provides superior fuel economy and is considered the better engine overall.
Is 900 hours a lot for a boat motor?
How many hours do boat engines last? Well-maintained inboard engines, inboard outboard engines (unless diesel), and outboards have a serviceable, average life of about 1500 – 2000 hours. If you are looking at a gas-fueled marine engine close to or exceeding 1000 hours, inboard or outboard, proceed with caution.
Why do boat engines not last long?
Many marine engines sit very low in the bilge and water is consistently in contact with the oil pan. Over the years this can corrode and cause pinhole leaks in the pan. Whenever there is a large deviation from normal, take that as an urgent warning.
How many miles can a 454 engine go?
454 will run 200k with the right oil.
What type of oil does a 454 take?
What is the recommended oil viscosity or SAE rating for Chevy 454 big-block engines? If you can’t find the owner’s manual, General Motors highly recommends 10W-30 oil for the 454. You can choose either a synthetic blend of fully synthetic oil as long as the SAE rating is 10W-30.
How much oil does a 1970 454 take?
| Engine lubricant oil capacity: | 3.8 liter / 4 U.S. qt / 3.3 imp. qt |
|---|---|
| plus 0.9 liter / 1 qt for filter change | |
| Engine coolant capacity: | 20.5 liter / 21.7 U.S. qt / 18 imp. qt |
| Fuel tank capacity: | 76 liter / 20.1 U.S. gal / 16.7 imp. gal |
| Battery capacity (Ah): | 61 |
How much does it cost to rebuild a marine engine?
Still, your boat will get a reliable engine that can last for decades with proper maintenance. Rebuilding costs start at $3,000, but they can sometimes reach $10,000.