Fuel issue please help !!

Luke84

Cadet
Joined
Aug 14, 2022
Messages
7
Hello I’m new to this forum .

I have a J130tledm johnson 130
.
Basically what’s happening now is the engine runs with a misfire and not in low rpm or idle. - rebuilt carbs and set to specs as per manual
- cleaned and flushed all jets and passages
- clean fresh gas
-Confirmed spark
- good compression
Main symptom and clue is that it runs and almost idles well when primer solenoid is In Open position. (Manually)
I removed the carbs and and watch the jets from primer solenoid operate correctly so I know it’s not stuck open or closed. Works in manual and with key.
With the primer closed, If I stiffle 2 carb throats partially with my hand the engine improves .
So I’ve deducted with my little experience with this engine that I have a fuel blockage in carbs or throttle body.
I cleaned all passages thoroughly.
Except the slow speed / idle needle valve, I was afraid to adjust it since my boat ran so well before this issue.
So BASICALLY my question is, is there some hidden passage or place that the fuel may be getting clogged and restricting that I’m not aware of, PLEASE HELP,
*Also note while engine running with solenoid closed, oil warning light sporadically coming. On. As if no gas/oil getting to one or more cylinders,
*also the fuel restriction seems to be only on one side of engine.
When I stiffle the 2 carb throat on the right. Engine bogs and dies like normal,
On left, engine speeds up and runs better temporarily.
Thanks in advance for your help
 

tphoyt

Lieutenant
Joined
Jun 10, 2010
Messages
1,327
Are you saying you didn’t remove the slow speed/idle needles when you cleaned the carbs?
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,963
The idle circuit is in the throttle bodies. There are usually side plates that cover the idle needle. You can remove them and spray the passages, and install a new gasket and plate.

Make sure the spaghetti seals between throttle body and intake manifold, and carb and throttle bodies are seated in their grooves. I dab of silicone can hold them in place.

Check the plastic carb bowls for warpage. If warped, replace them. Don't forget that main jet is in bowl.
 
Joined
Jun 5, 2010
Messages
7
The idle circuit is in the throttle bodies. There are usually side plates that cover the idle needle. You can remove them and spray the passages, and install a new gasket and plate.



Check the plastic carb bowls for warpage. If warped, replace them. Don't forget that main jet is in bowl.

x2 for the above. 30 year old plastic bowls are problematic. On the 2 barrel crossflows and the looper carbs.
 
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