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Jan 23rd, 2013
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Mercury Blackmax Carbs - pickup tubes #12350879
07/21/17 03:06 AM
07/21/17 03:06 AM
Joined: Jan 2013
Posts: 83
McKinney, Tx
C
CraZyNOTRT Offline OP
Outdoorsman
CraZyNOTRT  Offline OP
Outdoorsman
C

Joined: Jan 2013
Posts: 83
McKinney, Tx
I bought some cheap chinesium rebuild kits off of ebay a few months back due to carb related problems (not a bad kits for the most part). The pickup/emulsion brass tubes were clogged so I replaced them. But the cheap Chinese tubes were poorly machined (all openings on the tubes were ruff/jagged and different sizes) and put them in cause the old ones were too clogged to clean. They fixed the problems I was having, but created a new issue that is starting to annoy me.

Any ways, I have some new OEM rebuild kits coming in next week for My 1984 Mercury Blackmax 150 / WH-29 carbs. The kits come with 2 different sizes pickup/emulsion tubes 0.023 and 0.028? I believe 0.023 is stock.

Should I stick with stock size or put in the bigger sized tubes in?
If the larger tubes are put in, what would happen? IE... running rich/lean/flooding/more power/nothing

Last edited by CraZyNOTRT; 07/21/17 03:08 AM.
Re: Mercury Blackmax Carbs - pickup tubes [Re: CraZyNOTRT] #12351445
07/21/17 03:10 PM
07/21/17 03:10 PM
Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...
gary purdy Offline
TFF Guru
gary purdy  Offline
TFF Guru

Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...
I had the same motor on a 1984 350v Ranger and I put a set of XR6 carbs on it. Worked great with the idle air adjustment. There is a chart showing stock sizes for everything on your carbs. Should be able to find in a search.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Mercury Blackmax Carbs - pickup tubes [Re: CraZyNOTRT] #12351590
07/21/17 04:28 PM
07/21/17 04:28 PM
Joined: Dec 2014
Posts: 1,664
Euless
M
Muzzlebrake Offline
Extreme Angler
Muzzlebrake  Offline
Extreme Angler
M

Joined: Dec 2014
Posts: 1,664
Euless
Don't know if boat motors are same as Motorcycle engines but the bigger hole(s)on emulsion tube gives a richer mixture at idle and just off idle thru midrange.


From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!

Re: Mercury Blackmax Carbs - pickup tubes [Re: CraZyNOTRT] #12351807
07/21/17 06:17 PM
07/21/17 06:17 PM
Joined: Nov 2006
Posts: 2,394
ft worth
T
TLW Offline
Extreme Angler
TLW  Offline
Extreme Angler
T

Joined: Nov 2006
Posts: 2,394
ft worth
stock.....

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