#1
IP: 70.108.202.201
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Main Jet replacement
Is it possible to install an adjustable main jet on the carburetor without dropping it off the manifold? The electric fuel pump is close to were the jet is installed.
Also, how does one adjust for proper fuel /air mixture once the jet is installed? Is there an instrument for this? Steve |
#2
IP: 38.102.16.123
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Steve,
You could install an adjustable main jet with the carburetor installed if (in the unlikely event) you have space to get a screwdriver in place to remove the fixed main jet and install the new fixed part of the adjustable main jet assembly. Adjustment is the easy part; you simply turn the adjustable needle in until it seats in the fixed jet and then back it out approximately 2 turns. From there you adjust the jet for best RPM with the engine fully warmed up and at your favorite cruising RPM. Don |
#3
IP: 70.108.179.72
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Hi Don,
FYI, I dropped the fuel pump and had access to the jet port. BTW, much less smoke with the fuel leaned out. Thnx -Steve |
#4
IP: 74.65.190.80
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I have an adjustable main jet needle valve that leaks. It appears that the 'stuffing' has been removed. How do I seal it?
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#5
IP: 141.239.218.236
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When you say "stuffing"... do you mean the WASHER?
__________________
-Jerry 'Lone Ranger' 1978 RANGER 30 |
#6
IP: 99.30.185.198
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I have a feeling that he may be talking about the internal shaft seal. Think of it as a seal on a faucet shaft or a really small stuffing box packing. While trying to find a replacement, a good place to start might be a lawnmower shop.
Tom |
The Following User Says Thank You to thatch For This Useful Post: | ||
zanchi (09-01-2018) |
#7
IP: 74.65.190.80
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roadnsky, I wish it were that simple! The needle valve leaks from the stem. When I removed the needle valve and the top nut, I found nothing where I would expect to find packing (stuffing). Maybe this valve does not need packing, and is just worn out?
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#8
IP: 24.152.132.140
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Yeah, it has shaft packing. You'll have to find a replacement somewhere (carburetor shop?) or replace the jet. Some old outboard engines, the Evinrude Fisherman 6 for example, had the same thing on their mixture adjustment.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#9
IP: 99.30.185.198
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"Pixels?"
As a footnote to this thread, Jerry's photos sometime seem to be on almost a "molecular" level. Nice work and keep 'em coming.
Tom |
#10
IP: 141.239.218.236
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Quote:
I know it's not my money but $40 is an easy fix. @ Tom - Thanks
__________________
-Jerry 'Lone Ranger' 1978 RANGER 30 |
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