Hydraulic lifters 7.4 1992 Mercruisers

[Aquacasa]

Hi, I have a pair of 7.4 1992 OD723544 Mercruiser Bravo1 sterndrives and need to replace a failed valve lifter, I have two part numbers, 811584 and 811583, what is the difference and which is the correct one. Thanks Ray Scott.

 

[jimmbo]

Welcome to iboats

Failed? In what way?
How did you attain 2 slightly different Part #s?
Did you speak with a Mercruiser Dealer as to what Part is needed?

 

[Scott Danforth]

Your motor is a GM truck motor. Look up a lifter for a 1992 GM 3500

 

[Aquacasa]

Welcome to iboats

Failed? In what way?
How did you attain 2 slightly different Part #s?
Did you speak with a Mercruiser Dealer as to what Part is needed?

lost 5mm off the bottom of the lifter, found the part numbers off the Perfprotech.com website

 

[jimmbo]

5mm? I would be pulling the Cam and replacing it, and all the lifters too

 

[Aquacasa]

Your motor is a GM truck motor. Look up a lifter for a 1992 GM 3500

Im in Australia, a bit hard to find parts for this model.

 

[Scott Danforth]

Agree with above. If you lost 5mm, you lost the cam lobe

Pull the cam and get a cam set

 

[Aquacasa]

5mm? I would be pulling the Cam and replacing it, and all the lifters too

other valves seem ok, cam seems a bit worn on the edges of that lobe.

 

[Scott Danforth]

Im in Australia, a bit hard to find parts for this model.

I know many folks down under building big blocks. Order from rockauto.com or summit racing.com Parts will be there in a week

 

[jimmbo]

Contact a Mercruiser Dealer for the Cam, they can get it. Once the New cam is in, it will need a Break In

 

[Aquacasa]

Contact a Mercruiser Dealer for the Cam, they can get it. Once the New cam is in, it will need a Break In

Contacted dealer, not one lifter in Oz

 

[jimmbo]

Get the Cam from a Dealer. Lifters can be bought from several sources

 

[Fun Times]

Hi, I have a pair of 7.4 1992 OD723544 Mercruiser Bravo1 sterndrives and need to replace a failed valve lifter, I have two part numbers, 811584 and 811583, what is the difference and which is the correct one. Thanks Ray Scott.

Your serial number 0D723544 shows your engine to be a true MERCRUISER W/ PS 7.4L Gen V BRAVO set up Model number 474B110ES...Not the 454 Mag so you'd need part number 811584 which shows available here in the US websites for the 7.4L version.

CYLINDER BLOCK AND CAMSHAFT - 1992 Stern Drive 7.4L [BRAVO] 474B110ES | Crowley Marine

View parts diagrams and shop online for CYLINDER BLOCK AND CAMSHAFT parts, 1992 Stern Drive 7.4L [BRAVO] 474B110ES. Offering discount prices on OEM parts for over 50 years. FAST $4.95 shipping available.

www.crowleymarine.com

Mercury-Mercruiser 811583 LIFTER

Mercury-Mercruiser 811583 LIFTER genuine factory part not aftermarket. Fast shipping - Click here to see live inventory status

www.mercruiserparts.com

CYLINDER BLOCK AND CAMSHAFT

CYLINDER BLOCK AND CAMSHAFT

www.mercruiserparts.com

1992 Stern Drive 7.4L [BRAVO] [474B110ES] - Parts Lookup | Crowley Marine

View parts diagrams and shop online for 474B110ES : 1992 Stern Drive 7.4L [BRAVO]. Offering discount prices on OEM parts for over 50 years. FAST $4.95 shipping available.

www.crowleymarine.com

 

[stresspoint]

call up Precision. https://www.precisionintl.com/ .
your cam is battered , replace it ,
the Precision people are knowledgeable and will set you up with a suitable marine camshaft. while you have it in bits replace the push rods. get a full set of lifters and check the rocker arms for ware where they contact the valve stem (common ware point on BBC).

might even pay to do the timing chain and gears while you are at it , as they are other ware points.

where in Australia are you ?.

 

[04fxdwgi25]

If lifter face is worn and the cam lobe is worn, then the cam is junk. Put in a "new" lifter and it will fail again, soon after.

 

[jimmbo]

If lifter face is work and the cam lobe is worn, then the cam is junk. Put in a "new" lifter and it will fail again, soon after.

Replacing a Lifter on a Flat Tappet Cam, almost always results in the Cam being replaced, not too long after. Roller Cams have a much better Survival Rate

 

[04fxdwgi25]

Replacing a Lifter on a Flat Tappet Cam, almost always results in the Cam being replaced, not too long after. Roller Cams have a much better Survival Rate

Another point, the lifters and cam break in / seat in together. Should never mix them up after break in or failure is usually imminent.