Mercarb TKS Replacement Carburetor Identification

[DangerMouse1]

Hi all,
I've got a 5.7L Mercruiser V8 (2006) with a TKS 2 barrel Carburetor. Had problems all summer long despite a rebuild on the carb. So I am looking to replace with a standard electric choke 2 barrel carb, but having issues with identification of the correct replacement.

I've attached a picture of the serial number, and the number is 8661 32 5216. Has anyone replaced a similar carb, I am thinking the Sierra Marine 18-7376N will replace as it states in the documentation "For use on 5.7L Mercruiser V8, 1998 or newer".

Not wishing for performance gains etc, just to replace and get on the water without the issues I had last summer.

Thanks.

 

[Scott06]

If it is for that application it should work just fine. You need to wire up a 12 v supply off the purple ignition circut . I thin this is the same one that supplies 12 v power to the fuel pump and ignition when the key is in run position . Double check where the fuel inlet is some are on the left side some in front of fuel bowl. This can be worked around just need to plan for it.

 

[alldodge]

To change you will need a Merc 2bbl, Choke tube and connector with 1/2 inverted flare fitting. The Merc carb doesn't use an electric choke, it uses a heat tube

Merc carb
https://www.mercruiserparts.com/bam/subassembly/31873/8182/80

Heat tube item 4 and fitting item 5 (check intake for plug where fitting goes
https://www.mercruiserparts.com/bam/subassembly/31873/8182/90
Also pull the 20 amp fuse near the carb

Or if you want to change the intake to take a 4bbl can use a Edelbrock 1409

 

[DangerMouse1]

Thanks for the replies. That is what I was thinking of doing @Scott06. I am happy to part ways with the TKS choke and hook directly to 12v with a return.

@alldodge Is there a reason you are stating to replace with OEM other than to keep the current choke system?

The Sierra Marine 18-7376N is a lot more economical route for me, so just wondering if there is something I am missing?

 

[alldodge]

@alldodge Is there a reason you are stating to replace with OEM other than to keep the current choke system?

The Sierra Marine 18-7376N is a lot more economical route for me, so just wondering if there is something I am missing?

I do my best to not buy Sierra, and don't recommend
Did find out that the Merc carb with electric choke is 864942A01 but only in rebuilt and about same price. Its a Rochester 2GC so culd go that route also

 

[Kubaat3lover]

Hi Ive got 4.3 with swapped TKS for Mercarb by previous owner, im happy with that if You will need any pics let me know!

 

[Scott06]

To change you will need a Merc 2bbl, Choke tube and connector with 1/2 inverted flare fitting. The Merc carb doesn't use an electric choke, it uses a heat tube

Both the mercarbs I’ve had had an electric choke - 1990 and 2003 they were oem mercarbs not messed with.

 

[Scott Danforth]

I would go new 4 barrel myself

 

[Kubaat3lover]

But You have to change the intake manifold for 4bbl right?

 

[Scott06]

But You have to change the intake manifold for 4bbl right?

Yes throttle cable bracket and fuel are also different

 

[Scott Danforth]

But You have to change the intake manifold for 4bbl right?

yes, however the reward is better fuel economy, better throttle response and better power.