Cold starting issue

[Redrig]

Hello all,

on my 77 OMC 302 with a Holley 2 bbl carb on it.

I have an issue with cold starting, basically it wont start unless I pump the throttle, then it fires right up.

after its warm it will restart with no problems, and the engine idles great once it running. Choke is fully opened after about 5 minutes, its an electric choke model.

Is this a choke issue ? I have the choke set to where it is barely closed when cold. Should I tighten that down a little further ? or could there be other issues.

I would love to be able to start it without priming it from the throttle everytime (less wear & tear on my shift switch)

any ideas?

Thanks in advance

 

[Black as]

Re: Cold starting issue

Do another cold start and adjust the choke to when you feel the engine can run on its own and that should fix your issue

 

[Redrig]

Re: Cold starting issue

Roger, I will try that.

 

[Don S]

Re: Cold starting issue

Hello all,

on my 77 OMC 302 with a Holley 2 bbl carb on it.

I have an issue with cold starting, basically it wont start unless I pump the throttle, then it fires right up.

after its warm it will restart with no problems, and the engine idles great once it running. Choke is fully opened after about 5 minutes, its an electric choke model.

Is this a choke issue ? I have the choke set to where it is barely closed when cold. Should I tighten that down a little further ? or could there be other issues.

I would love to be able to start it without priming it from the throttle everytime (less wear & tear on my shift switch)

any ideas?

Thanks in advance

Basically, that's how carbed engines work. The pumping 1 or 2 strokes and opening the throttle 1/8 to 1/4 then starting is absolutely normal.
If you want to leave it in neutral to start without using the lever, you need EFI.
In the grand scheme of things, that bit of throttle pumping on a cold engine is not a big deal on the cable.

 

[Silvertip]

Re: Cold starting issue

Do another cold start and adjust the choke to when you feel the engine can run on its own and that should fix your issue

That is NOT the way to adjust an automatic choke.

1) Stone cold engine (do not start the engine)
2) Move throttle forward and back to ensure choke sets
3) If choke butterfly is not closed, adjust it so it just barely closes. If it is closed, push gently on the back side of the butterfly. The choke should open with just slight finger pressure. If not, it is set too tight.
4) On a properly warmed engine the butterfly should stand fully vertical.

 

[Redrig]

Re: Cold starting issue

Basically, that's how carbed engines work. The pumping 1 or 2 strokes and opening the throttle 1/8 to 1/4 then starting is absolutely normal.
If you want to leave it in neutral to start without using the lever, you need EFI.
In the grand scheme of things, that bit of throttle pumping on a cold engine is not a big deal on the cable.

Sounds good Don, Like I said the carb runs the engine just fine expect onthis issue, but doesnt sound like its a problem at all. Thanks for the response.

1) Stone cold engine (do not start the engine)
2) Move throttle forward and back to ensure choke sets
3) If choke butterfly is not closed, adjust it so it just barely closes. If it is closed, push gently on the back side of the butterfly. The choke should open with just slight finger pressure. If not, it is set too tight.
4) On a properly warmed engine the butterfly should stand fully vertical.

That is exactly how I have it set right now, just barely closed when engine is stone cold.

Appreciate the help fellas.

 

[Black as]

Re: Cold starting issue

That is NOT the way to adjust an automatic choke.

1) Stone cold engine (do not start the engine)
2) Move throttle forward and back to ensure choke sets
3) If choke butterfly is not closed, adjust it so it just barely closes. If it is closed, push gently on the back side of the butterfly. The choke should open with just slight finger pressure. If not, it is set too tight.
4) On a properly warmed engine the butterfly should stand fully vertical.

It works for me my friend and how do you know if it's set right if you dont start it cold

 

[Silvertip]

Re: Cold starting issue

It works for me my friend and how do you know if it's set right if you dont start it cold

You check it first to see if it is closed. If not you know before you start the engine that it needs adjusting. If the choke is closed, the next check is to see how "tightly" it's closed. Adjusting it after the engine begins to warm (or the electric heater begins to warm it) is not when to adjust it as it will then be too tight when the engine is stone cold. But do what works for you. Because it does does not make it right. People do things all the times that is counter to the manuals and get away with it. Most of the time the positive result is due to "luck" rather than following recommendations. Besides, if the carb has a choke pull-off (either internal or external) the choke is already open a bit immediately upon starting.

 

[Black as]

Re: Cold starting issue

You check it first to see if it is closed. If not you know before you start the engine that it needs adjusting. If the choke is closed, the next check is to see how "tightly" it's closed. Adjusting it after the engine begins to warm (or the electric heater begins to warm it) is not when to adjust it as it will then be too tight when the engine is stone cold. But do what works for you. Because it does does not make it right. People do things all the times that is counter to the manuals and get away with it. Most of the time the positive result is due to "luck" rather than following recommendations. Besides, if the carb has a choke pull-off (either internal or external) the choke is already open a bit immediately upon starting.

the choke is already open a bit immediately upon starting.[/QUOTE] then adjust it !!!!!!!

Thats like saying lets look at the manual to see how you change spark plugs ?