trying to start motor on floor no spark

[badbowtie]

I am trying to start a chevy 350 on the floor in the garage to make sure everything is okay before I reinstall in boat saturday morning. It is a 85 mercruiser and with thunderbolt ignition I have positive from started running to battery and another wire from postive coil to battery. I am running a wire from block to neg on battery and running a wire from the ground wire eyelet on thunderbolt box to negative on coil and negative coil down to neg on battery. Trying to use a screwdriver to jump the soloniod it cranks but I have no spark. I have the two wires that come from the dist that both go to the thunderbolt box then two from thunder volt box run to coil. I must have something not wired up correct somewere please help.

 

[Bondo]

Re: trying to start motor on floor no spark

and running a wire from the ground wire eyelet on thunderbolt box to negative on coil and negative coil down to neg on battery.

Ayuh,... Yer groundin' out the coil,.... it Can't fire.....

ground the eyelet to the manifold, 'n get the wire Off the coil's (-) post to the battery...

 

[badbowtie]

Re: trying to start motor on floor no spark

thanks, went out and unhooked the negative off the coil and it fired up. Will not idle, quadrajet seems like it's flooding the motor out, have another one that is rebuilt, may try that tomorrow, have never rebuilt a quadrajet, only done holley and edelbrock.

 

[achris]

Re: trying to start motor on floor no spark

thanks, went out and unhooked the negative off the coil and it fired up. Will not idle, quadrajet seems like it's flooding the motor out, have another one that is rebuilt, may try that tomorrow, have never rebuilt a quadrajet, only done holley and edelbrock.

Follow the genuine service manual to the letter, make sure everything is spotlessly clean, soak it in cleaner for 24 hours, use dry compressed air to blow out all the passages, use all new gaskets and diaphragms and you should be good to go...

 

[tpenfield]

Re: trying to start motor on floor no spark

I am trying to start a chevy 350 on the floor in the garage to make sure everything is okay before I reinstall in boat saturday morning. It is a 85 mercruiser and with thunderbolt ignition I have positive from started running to battery and another wire from postive coil to battery. I am running a wire from block to neg on battery and running a wire from the ground wire eyelet on thunderbolt box to negative on coil and negative coil down to neg on battery. Trying to use a screwdriver to jump the soloniod it cranks but I have no spark. I have the two wires that come from the dist that both go to the thunderbolt box then two from thunder volt box run to coil. I must have something not wired up correct somewere please help.

You mean like this . . .

I think that you are over complicating the wiring. When I test ran my 454, I just tapped into the wiring harness connector for ignition and starter. Then I hooked the battery leads to where they normally connect, i.e. the starter and the engine block.

 

[achris]

Re: trying to start motor on floor no spark

Thanks Ted! I just had a 'crisis'...

Chris...........

 

[badbowtie]

Re: trying to start motor on floor no spark

I ended up switching to the other carb I had hear this mornig and was able to fire it up so all is good.
achris is there a genuine manual online somewere to follow perfectly to rebuild these carbs, Also is there a certain brand rebuild kit you recomend that includes everything.

 

[achris]

Re: trying to start motor on floor no spark

... genuine manual ....

http://www.4shared.com/document/LXsFg1do/Service_Manual_09.html

Sorry it took so long to find...

 

[badbowtie]

Re: trying to start motor on floor no spark

I guess I should of figured to check that manual Thanks.