Mercruiser 3.0L Mercarb Choke Rebuild
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- čas přidán 28. 09. 2020
- Here is a video of the interior setup of the Mercarb, not Rochester, 2BBL for the Mercruiser Inline 4 cylinder 3.0 Liter engine. This one is on a 1987 Sea Ray 200 Bowrider. Checked around slightly for a replacement and its expensive so I'm going to epoxy this one and make a video of the result if all goes well!
If you shut your boat off the choke does not automatically close. It’s not an “inconvenience to wait 2 minutes for the choke to open”. Because the choke does not actuate until you set it manually. If you want to set the choke you move the throttle in neutral to wide open throttle and then back to neutral. That is what closes the choke (along with a properly adjusted electric choke spring). If you set the choke manually - then you do have to wait a bit 1.5-2 minutes for the choke to fully open on its own. Although once the electric choke spring starts to heat up and vacuum is being pulled the the carb it can open sooner than that once it fires. Nice video on the internals of the electric choke though. If anyone is confused about his explanation on how the choke works - watch a video on how the choke linkage actually works with the “fast idle cam” that is what actually sets the choke when you move the throttle to the wide open position in neutral with the key off before you attempt to start the motor.
There is a lot wrong with your explanation of how the choke works, but at the end of the day you fixed it, nice! The coil spring inside the choke heater is a bimetallic strip.. It doesn't get soft... it uncoils as it heats up because there are two different metals with different thermal expansion rates.. The airflow through the carb is not what makes it open more... Not criticizing your video, just adding this comment for informative purposes
On my 2007 Mercrisuer 3.0L I replaced it with this style carb but since it used to have an enrichment solenoid, I didn't have an easy 12v lead to hook up to the new electronic choke, so I just zip tied the choke arm so it's always wide open and everything works fine.
Thanks for making this video, this is what is wrong with my choke-for sure!
have to thank you - mine wasn't working and I took it apart. Wet n dried the alloy disc to get the crud off, one of the contacts had broken but I prised the other one up and hey presto it works!
What kind of adhesive did you used if you ever did and did that fixed it?
I bought 1996 3.0L same setting boat that has sat 10 years probably broken. Did replace this carb part with Mercury OEM for something like 60$ online, but it would still operate finiky. I got 12 V to it but it opens way later. But on summer days my upper valve remains open even without turning key/supplying 12v to it. Is it normal?
For the record. Still working on boat. Figured fuel supply issue. Wont maintain engine RPM. its bad. Going to rebuild carb to have that desired sound as on last 5 second in video. Sounds very good Sir. Happy 4th!
Question is the choke is not adjusted make the carb dripping????? When you turn off ?????
Choke is only an air restrictive device, it will not control fuel. Dripping carb sounds more like a jet problem or bad gasket
Did you figure out what adhesive is there?
might just be a heat transferring paste like they use on cpu's to transfer heat to the fan.
Am driving crazy whit my boat NEW KIT everything inside is new and keep dripping gas when is hot and turn off 😢
Sounds like your fuel line is bad or the bowl is over tightened. I would reassemble the carb and make sure everything is clean. A grain of sand can cause a gap in a gasket
Am not a expert here 😂 what or where is the bowl jejeje thanks brother for your time and help !!!!
@@sinewavespecialties2373 I did that 3 times look clean go out again and same keep doing same I put the old needle same and new carb is 300$ 😢
@@gherickb8181 so if you’ve done it several times then it’s time for a new set of eyes. Either a buddy, watch a video on a full mercarb rebuild, or find a very flat surface and make sure all mating surfaces are indeed flat. You may have a bent surface or a gasket is split.
This basrard, hahaha