Edelbrock 1409

[1979 Quartermasters]

Got it all installed and ready to go. Will be a while yet till I can run it as spring doesn't come here for a while yet. Just wondering, if I turn the ignition on, with out starting it, will the choke slowly open as though the engine was running? Can I test it this way? Also, should I set it a certain way when its stone cold like one would with the other style choke?

 

[Rick Stephens]

I'd run it on muffs is a second, no matter the temps. Just pull the drain plugs when you're done. And yes, with ignition on the choke will heat up and open.

 

[1979 Quartermasters]

Thanks Rick. My boat is on a stand inside my heated garage. Trailer is currently buried in snow in the back yard. I got lots to do including painting my drive, lube changes, polish and wax plus full tune up. We'll have to wait for spring for fire up.

 

[1979 Quartermasters]

Well guys, spring is finally here. Today, the boat will be getting polished and waxed. Then I will be taking it off the stand and putting on trailer. After I put the drive back on, I would like to fire it and warm up the oil. Anything I should do, in regards to the carb, before I turn the key. It was suggested I remove the + coil wire and spin the motor to fill the bowl in the carb. Is this nessesary?

Ken

 

[Bondo]

After I put the drive back on, I would like to fire it and warm up the oil. Anything I should do, in regards to the carb, before I turn the key. It was suggested I remove the + coil wire and spin the motor to fill the bowl in the carb. Is this nessesary?

Necessary,..?? Naw,.... It just reduces the time the starter is engaged,....

I'd splash a 1/2 oz. of gas down the carb instead,.....

Did ya change the fuel filter,..??

Don't wanta pump crap into yer brand new carb,....

 

[1979 Quartermasters]

OH YA!!!!! you bet. I'm sure there is a thread somewhere on how to set up those 2 Idle mixture screw.
Thanks Bondo.

Ken

 

[FreeBeeTony]

If you have a pipe plug in your intake manifold you can use a vacuum gauge.

 

[1979 Quartermasters]

Well I dragged the boat outside and fired it up on the muffs. A little shot of gas and it fired right up. It idled after a couple minutes of warm up time. I set the idle mixture screws and idle speed and it purrs like a kitten. All the ignition parts are new, but I haven't checked the timing yet. I read that to check spark plugs at different RPMs to see how the mixture is. It said to shut engine off at WOT to get an accurate read on the plugs. Would you guys recommend this testing method?

 

[Scott06]

Yes test out at an rpm range, stop it and immediately pull a couple plugs and read them. If you don't have the eddy manual a link is attached.

 

[Scott06]

http://www.edelbrock.com/automotive/misc/tech-center/dl/carb-owners-manual.pdf

this link is correct one

 

[1979 Quartermasters]

Just to be clear, kill the power at 4600rpm? Seems unhealthy! lol

 

[Scott06]

No not exactly. I typically check after idling, at 2800-3200 rpm cruise, then WOT. Each time run for say five minutes at that speed, cut throttle to idle, turn off then check plugs. There may be others with more experince here and you can look online for plug reading guides.

My 1409 is on a 5.0, I ended up increasing accelerator pump nozzle to .43 went one notch sooner on step up spring (pink7"), one step richer on metering rods and one step richer on secondary jets. Still think my WOT is a Touch lean.

 

[Rick Stephens]

Just to be clear, kill the power at 4600rpm? Seems unhealthy! lol

The 1409 has sections of the carb that are active for different RPM ranges, hence pick one range to run at, run for 5 minutes, then shutdown. It really isn't unhealthy to chop throttle and hit ignition off with a boat motor unless the act causes a surge of water at the stern and your exhaust flappers aren't any good. The boat is under 100% load, so the motor just very quickly stops turning. The idea here being the plugs are left in the condition they were during the 5 minute run and not changed by time spent at idle.

 

[1979 Quartermasters]

Ok, thanks. I'll give that a try. Hopefully its good the way it is. Carbs are a little too finicky for me.

 

[Bondo]

Ayuh,.... Donno if this has been posted in this thread yet,....

Everything you'll ever need to know 'bout the AFB carb,....

 

[Rick Stephens]

Ayuh,.... Donno if this has been posted in this thread yet,....

Everything you'll ever need to know 'bout the AFB carb,....

From past experience, the Edelbrock manual Bondo posted above is the best ever. I absolutely love the clarity where after reading it you can simply go to calibrating your Edelbrock carburetor. The design of this carburetor is brilliant from the standpoint of adjustments. You can take each throttle range as an isolated procedure. Many carburetors, you tweak the midrange and it screws up high range. The Edelbrock is usually much more predictable. Start adjusting at idle, then go to cracked open, say running at 1200-1500 RPM. Then go to quarter to third throttle 2500-3000 RPM and calibrate there. I then like to run up to wide open primaries and completely closed secondaries. For me this is up barely over 4k. I leave WOT to last. I'm also judging engine smoothness when the throttle is quickly advanced, how much and how smooth the power applies. This is tweaked with needle spring strength and throttle pump.

The Edelbrock is anything but finicky. Calibrating properly does take the mechanic being finicky if you want it just right, which is safest for engine life, fuel efficiency and performance.

 

[1979 Quartermasters]

Thanks Bondo and Rick. Is it possible it may be perfect out of the box. It ran awesome at all the RPM ranges you were addressing.