Aisan carb question (1 Viewer)
- Thread starter Bluegrass40
- Start date
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It is barely in there. Don't force anything, but I'd try.
This is the worst part of my Aisan. Gasoline gets all over the venturi, the wall of the carb, then gets hung up on the shelf where the screws for the venturi mount. The fuel might actually make it past the throttle plate if it doesn't find its way into the EGR inlet abyss. The accelerator pump must work its best, because it barely works at all; stumble on a mildly warm 2F, high-elevation, hard throttle.
- Thread starter
- #5
Thx. Will do.
Someone has def rebuilt the carb. There were several indications along the way during disassembly
- missing gasket between vacuum secondary and carb
- several missing washers and lock washers
- slots on end of jets damaged with screw driver.
Leather plunger, or rubbery? Is the motor burning any oil?
- Thread starter
- #7
The carb is new to me. Don’t know the history.
- Thread starter
- #8
Tried to free it up with a razor blade. No luck. Leave it or do I need to find a solution? I have a carb from an ‘84 if I need to build two into 1...
I don't know if the equivalent part off of a '75 would work, but I'll send you mine if it gets hairy.
TCEd
SILVER Star
I'm guessing someone staked it to make assembly easier. Once you free it be very careful to not damage the spring, it's not in the rebuild kit. I accidentally stretched it and use a Bic ink pen spring as a replacement. Ed
I'd bet that most of the junk in there is either small or soluable. If the plunger works, why fix it? If you get metal flakes in the internal passage, will they rinse or blow out?
- Thread starter
- #15
The stakes are deeper than they appear in the picture. I think that since the clearance between the plug in the carb body is so small, I am pushing/deforming more material when I try to use a razor blade to release the stakes. If I reassemble it as is, is there anyway to tell if that plunger or check valve is not working properly? What would I noticed in operation. It stumbling with hard acceleration?
If you finish the rebuild and get gas in the bowl, you can watch the plunger squirt gas onto the side of the venturi, with the action of the throttle. You should have good squirt of gas. An acceleration stumble would be the symptom.
- Thread starter
- #17
Thx for all the help everyone!
So that part of the accelerator pump system is basically check valve to only allow flow one direction (into the barrel). So I can just put a fluid in the piston side and manually cycle the piston and make sure I have flow out of the preface into the barrel (prior to reassembly). I’ll give that a go. If I don’t have good flow I’ll get it opened up.
