Help me set up my new edelbrock 1409

Rugglesworth

Petty Officer 2nd Class
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Jul 6, 2023
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I set mine on the trailer but it behaved the same in the water. The service manual for TBV says to set in the water.
So fire it up, jumper wire on, take throttle connection off, adjust idle screw and then adjust throttle cable and reattach? Anything im missing and have I done it right so far?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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you adjust the idle mixture screws to the point where the engine gives you the most vacuum at idle. each engine and carb are unique and need to be tuned in-situ
 

Rugglesworth

Petty Officer 2nd Class
Joined
Jul 6, 2023
Messages
159
you adjust the idle mixture screws to the point where the engine gives you the most vacuum at idle. each engine and carb are unique and need to be tuned in-situ
ok so I need a vacuum gauge for this procedure. I read on here 8 btdc was the right number but I guess 10 can't hurt. Is that a number from a factory manual or a number that's worked well for people? Thanks for your help
 

Rugglesworth

Petty Officer 2nd Class
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Jul 6, 2023
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159
ok so I need a vacuum gauge for this procedure. I read on here 8 btdc was the right number but I guess 10 can't hurt. Is that a number from a factory manual or a number that's worked well for people? Thanks for your help
I should also mention while I was adjusting the timing by moving the distributor (grabbing it by the top over the wires) I was shocked. I was wearing a leather glove but definitely felt it a couple of times. Does this mean my wires are toast as well?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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ok so I need a vacuum gauge for this procedure. I read on here 8 btdc was the right number but I guess 10 can't hurt. Is that a number from a factory manual or a number that's worked well for people? Thanks for your help
8 degrees keeps the motor dummy proof from someone using 85 octane fuel with water in it (detonation) and keeps reversion at bay when when the motor is installed in a sterndrive application with a lot of tail load (extended swim platform). the distributor advance of 24 degrees makes the motor happiest to pull load with a static base timing of 12 degrees. 12 + 24 = 36.

I should also mention while I was adjusting the timing by moving the distributor (grabbing it by the top over the wires) I was shocked. I was wearing a leather glove but definitely felt it a couple of times. Does this mean my wires are toast as well?
yes, or at least the boots need dielectric grease
 

Rugglesworth

Petty Officer 2nd Class
Joined
Jul 6, 2023
Messages
159
8 degrees keeps the motor dummy proof from someone using 85 octane fuel with water in it (detonation) and keeps reversion at bay when when the motor is installed in a sterndrive application with a lot of tail load (extended swim platform). the distributor advance of 24 degrees makes the motor happiest to pull load with a static base timing of 12 degrees. 12 + 24 = 36.


yes, or at least the boots need dielectric grease
ok thanks that makes a lot of sense. This boat does have a large built in platform but is an inboard. I have some diaelectic grease so I'll try that first
 

Rugglesworth

Petty Officer 2nd Class
Joined
Jul 6, 2023
Messages
159
ok thanks that makes a lot of sense. This boat does have a large built in platform but is an inboard. I have some diaelectic grease so I'll try that first
alright, she's purring at 12 degrees idling at 800 rpm cold. Put on the dielectric grease. She starts up immediately with hardly any throttle will almost start cold with no throttle. I'm going to try to dip her in the ocean this weekend to do the idle adjustment as that's what is closest to me. I don't have a vacuum gauge right now but I will get one and check the mixture again when I get it.
 

Scott06

Admiral
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Apr 20, 2014
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alright, she's purring at 12 degrees idling at 800 rpm cold. Put on the dielectric grease. She starts up immediately with hardly any throttle will almost start cold with no throttle. I'm going to try to dip her in the ocean this weekend to do the idle adjustment as that's what is closest to me. I don't have a vacuum gauge right now but I will get one and check the mixture again when I get it.
I've never hooked a vacuum gauge to my boat, car for sure) I do it mostly by ear. On my 5.0 w a 1409 I find it likes it about 1.75 turns out
 
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