Hard starting when the engine is warm

Hey guys,I finally put a phenolic carb spacer to help keep the carb cool.It really does a great job keeping it cool,but I still get the white smoke out of the front two barrels of the carb when I shut the engine off.Its not as bad as it use to be and the engine does start better maybe the 6th.crank or so when the engine is hot.So does the white smoke out of the front two barrels mean.

check what the timing is at 2500 rpm to verfy that the mechanical it advance is working correctly. and that it doesn't need tweaked a little.

Well I've got it at 10BTDC on my boat.Seems to be the sweet spot for my boat.

So if the timing nedds to be tweaked a little which way do you go? Advance it or retard it.

Glad to see progress has been made. You have the right carb for your engine don't worry about the 450 cfm vs 600. My engine starts warm pretty much instantly and when the choke is attached and wired it starts cold pretty much the same way. If you have to give it gas to get it started warm then I would suggest pulling her out for a rebuild or at least pull off the plates over the float bowls and look for any evidence of crud. Starting will not be effected by rod and jet changes and in general the rods and jets that ship with the 1409 I found to be about right for my 302 last year. I left it maybe two steps richer at the end of the year but we were doing a lot of pulling multiple skiers (got up to 6 before running out of ropes). I have new heads, rockers, exhaust, and ignition on the motor this year and am going to need to re prop to get the rpm back down reasonable those changes will be enough that I will get the strip kit back and make some changes... possibly with an eye to more fuel economy...

Hey guys,I got it last night.I really leaned the carb down.Got the vacuum where I wanted it,kept screwing the mixture screws in till I heard the slight rpm drop.I can run the boat,get it hot,shut it off and wait 5,10,or 15 minutes and all I have to do barely crack the thottle and it the key,third crank of the motor and it starts every time.Also had to set the ckoke 3 notches lean.Thanks for the help guys,I've been beating my head against a wall for weeks now.

Not to hijack the thread but, 77stang, you asked whether the starter spins the motor as hard hot as it does cold...I used to have that problem frequently. After it cooled a bit, it would crank normally and eventually start. What are the main causes of that? Thanks.

His comment about a 450 being on it before worries me a little too and I'm just curious if it was a two barrel before and now it's a four.

JoeinNY did you have to change any rods or jets when you installed your edelbrock on your 302? And if you did what did you use? I assume you don't have this hard starting problem when your engine is warm.

I'll try again tonight and see what happens.I'll let you know how it goes.Just to let you know if anyone live close to Cincinnati,I live 10 minutes south of the ohio river in kentucky.If anyone has a helping hand,that would be great.

JoeinNY,I assume you have the edelbrock 1409,so how did you set yours up?

I never thought my Dad was as good as he is, until I made him hook-up my first car to a 4 gas analyser to dial in the carb that he rebuilt and adjusted on the 65 belair a month ot two earlier. He tryed and let me try to get it better than it was already set at but we couldn't, that's the day I learned why all of the other mechanics in town came to my dad with carb problems they couldn't fix asking for help.

79,

I have to use the manuals, i'm a CPA not a mechanic although my father was a factory mechanic for forty years and always stressed the importance of manuals. I've been burned enough by shade trees and winging it if you will (certainly not assuming you are a shade tree or anything even close to such)

I might add however, that a small percetage of GM truck rearends howled and it was caused by an issue never addressed in the manuals. hence GM sent some engineers here to tulsa to see what dad did to solve the problem. thus, your comments on experience and not complete reliance on manuals is well understood

79nautique wrote: Jerry calling you an a?? would be insulting, making a comment about chasing it is sarcasm

i guess i'm just being a bit sensitive - no harm, no foul - ill just fall back into obsecurity

Jerry calling you an a?? would be insulting,

making a comment about chasing it is sarcasm