Carburetor Rebuild Specialist (1 Viewer)

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fj40cm1980

fj40cm1980

Joined
Feb 21, 2022
Threads
17
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53
Location
Washington State
At one point in time, I saw there was someone highly recommended on this forum who rebuilds original carburetors -- however, I've searched and searched and can't find them. I've got a 1980 fj40 original carb on original 2F motor. Hoping to send it off for a rebuild. Thanks!

IMG_7816-1.jpeg
 
And @FJ40Jim , and @mattressking


One more thought…and yourself following @pinheads 7 videos. Pretty straightforward.
 
mattressking said:
What makes you think the carb is at fault? Did you check vacuum at idle when cold and warm? Anything below 18in will yield hesitation and/or changes in cold and warm start.
Click to expand...
Well, it was sitting for quite a long time before I purchased the truck. I've spent maybe 10 hours trying to tune it using the simple drop lean method to no avail. I had a Toyota tech look at it (who has some experience with 40's) and he said it needs a rebuild. Apparently the accelerator pump isn't engaging...in general I think its just something I ought to have done. Can I ship it off to you?? ;)
 
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there was some discussion a few years ago about the 1979 and 1980 carbs not being the best unit available.
after talking with Mark A, he ended up building me a quasi carb with some bits of my 1980 and other bits from a 1981+ carb. been running good since.
@65swb45
 
3_puppies said:
there was some discussion a few years ago about the 1979 and 1980 carbs not being the best unit available.
after talking with Mark A, he ended up building me a quasi carb with some bits of my 1980 and other bits from a 1981+ carb. been running good since.
@65swb45
Click to expand...
Yeah - I think it was due to the jet size to "save gas" if there were such a concept with Cruisers. And one of a handful of reasons why I am not running a period correct carb in my 1980. (IE desmog, short production run = hard to find, etc).

That said - don't let my reasons stop you from going forward! I watched the Pinhead videos over and over - they are great - learned a lot, and if that fails, there are backup options.
 
3_puppies said:
there was some discussion a few years ago about the 1979 and 1980 carbs not being the best unit available.
after talking with Mark A, he ended up building me a quasi carb with some bits of my 1980 and other bits from a 1981+ carb. been running good since.
@65swb45
Click to expand...
Much appreciated, I'll look into that!!
 
OlYellr said:
Yeah - I think it was due to the jet size to "save gas" if there were such a concept with Cruisers. And one of a handful of reasons why I am not running a period correct carb in my 1980. (IE desmog, short production run = hard to find, etc).

That said - don't let my reasons stop you from going forward! I watched the Pinhead videos over and over - they are great - learned a lot, and if that fails, there are backup options.
Click to expand...
Interesting...I'll try to unearth that thread. Perhaps @mattressking is familiar with that issue??
 
Happy to speak with you tomorrow. I’ve got to spend today getting back on track with my current workload after the holiday weekend. Got a trans/ split case combo to button up, and 3 other carbs on deck.😊
 
Since my rig came from Venezuela a year and a half ago, it has gone through three carbs. All three have failed in that they started flooding the engine. The first carb, with which it came, appears to be a legit Aisin. The second was bought from Cruiser Parts in NH for about 250usd. The third was bought from Amazon (cheapo chinese) for about 100usd. There is a chance that the first one had fifty years of use on it and the second and the third ones were junk. Or, there is a chance that something in my fuel system is killing carbs. I left a voicemail for Mark tonight to see if he can rebuild my Aisin or take it as a core for one he has on the shelf. Of the many wonderful attributes of the 40 series, one of them is helping us appreciate the reliability of the 200 series. (PS - I drive out of my way to buy non ethanol gas, and then tonight I read somewhere that we should NOT put non ethanol gas through these carbs. What?)
 
Hendlerj said:
There is a chance that the first one had fifty years of use on it
Click to expand...
I have 50 years on me... I'm still relevant and your carb may be too.

I am not speaking for @65swb45 (Mark) at all - and if I am effing this up Mark, not intended- no way for him to really know unless he has his hands on it to see if workable, salvageable, candidate to be cannibal. I just sent mine this week to him so he can assess and an informed decision/path can be made.

My opinion - and frankly I am struggling some with my rig. It is exactly what @mattressking is asking in this thread.... what about the engine? Do you have leaks, what is your compression, what does a leak-down test reveal. I've blamed the 2 carbs I have over and over, this week, I really think it is my engine that was just rebuilt. I had it in my head, it can't be that. So I sent one of my carbs to Mark as I trust him (the other remains on so I can start to do engine test now). If/when he say this is a legit carb (I am a noob and I did 2 rebuilds of the Carb on my own as I wanted to learn - got a bit desperate at the end and swapped some oddball diaphragm in the secondary actuator - I'll fess up - I was low - surprise Mark!) I can rule stuff out to get to the real issue at play.

For me it was like when your steering wheel vibrates and you take to to get wheel balance. OK, I think it is better, you say to yourself it must be better, but it isn't. So you take it somewhere else insisting the wheels weren't balanced properly. so they are done again. And you convince yourself it is better, yet it isn't. So you go to a third place. Then they say your rim is bent, and no amount of balancing would fix it. Yet you spent all that time and resources thinking you knew. I tell my staff over and over. It not the things you know or the things you don't know that get you into trouble. It is the things you think you know, that just aint so, that get you into trouble.

I digress.

Maybe it is simply an issue with the float in yours, or debris. Try rebuilding it your self and learn about it if you really want to know the details. And if that doesn't work, send to Mark to assess or @mattressking (we never really met so I don't call you by your name - I am odd that way sir) and fix your honest attempt at learning. Or just send it in and have the carb verified as legit, to point you to other possible issues at play and get on the road sooner or to fix an issue.

Again I was sure the last 2 months it can't be the engine - it must be the carb. Maybe it is maybe it isn't. But I'm humbled again by life's lessons working of a FJ40 can teach.

Apologies about the novel - sheesh - I made a new margarita tonight - jalapeño blackberry margarita, yum - had a few, clearly.

You will get there! 1) don't buy more carbs IMO. 2) Pause. Be deliberate, 3) be open. 4) Have fun with it. 5) If you want something sooner, 5a) wait for a call back, 5b) send in the carb with a Money Order or what the person you choose prefers to get work started after you call. 5c) know what you will do based on the outcome... carb was fine, it is something else, vs carb not fine but is now. 6) If you want to know more about carbs, rebuild it your self and see - if that fails, see #5.

Cheers
 
Opened up @Hendlerj carb yesterday. There was really nowhere else to go but up from where it was.

1. There was a large piece of metal debris in the fuel inlet above the seat, stuck in the screen.
2. Someone replaced the World-market 1.50 primary jet with a 1.12, which is on the small side, even for a F engine.
3. A homemade retainer was forced into the bottom of the accelerator pump accumulation chamber (under the plunger) which did not let the check ball move properly.
4. The spring that helps keep the accel pump discharge chamber primed was missing
5. The secondary diaphragm is dead
6. The ICS has an intermittent grounding issue
7. The two bolts holding the fuel bowl down to the throttle body were ridiculously tight, overcompensating for the fact that the last person who worked on it didn’t have two split washers, while the head of the hollow screw which comes up from the bottom is stripped almost beyond use. :rolleyes:
DA7C53D0-6D1E-4D46-93D5-AFD1018DEDD4.jpeg
 
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8. Forgot to mention: someone glued the carburetor on with RTV😛
IMG_7091.jpeg
 
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