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Old 02-20-2016, 12:35 PM
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1976 280s cold starting problem

howdy,
went to show this the other day (25 degrees) to a potential buyer and it wouldn't fire. cranked like a bastard but no ignition. spark, fuel all present and accounted for.
today (50-ish degrees) and it started.....had to crank it for a few dozen seconds but it fired up pretty well for not being run in awhile and considering whatever was in/on cc and plugs after the other day.

i want to know if there is a cold start valve (or similar part) that could cause this problem.

thanks in advance!
g

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"...let us put aside the blindness of mind of those who can conceive of nothing higher than what is known through the senses"
-Saint Gregory Palamas, ---Discourse on the Holy Transfiguration of Our Lord God and Savior Jesus Christ


Centrally located in North East Central Pa.
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Old 02-20-2016, 02:45 PM
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Join Date: Feb 2011
Location: Modesto CA
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Quote:
Originally Posted by Hogweed View Post
howdy,
went to show this the other day (25 degrees) to a potential buyer and it wouldn't fire. cranked like a bastard but no ignition. spark, fuel all present and accounted for.
today (50-ish degrees) and it started.....had to crank it for a few dozen seconds but it fired up pretty well for not being run in awhile and considering whatever was in/on cc and plugs after the other day.

i want to know if there is a cold start valve (or similar part) that could cause this problem.

thanks in advance!
g
1976 280S = W116, 6-cyl M110, w/Solex 4A1 carb
Correct?

If there was both spark and fuel, but no start, look first to there being less voltage at the plugs than required at the stated temp, and then to the condition of the "fuel". Again, at the temp of 25F, fuel volatility might be so low, due to old fuel, that an ignitable mixture was not formed.

The carb does have a cold starting device (TN), separate from the conventional choke.
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  #3  
Old 02-20-2016, 04:08 PM
Hogweed's Avatar
Watching SB LII every day
 
Join Date: May 2005
Location: in the back of beyond a.k.a. Pa.
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Quote:
Originally Posted by Frank Reiner View Post
1976 280S = W116, 6-cyl M110, w/Solex 4A1 carb
Correct?

If there was both spark and fuel, but no start, look first to there being less voltage at the plugs than required at the stated temp, and then to the condition of the "fuel". Again, at the temp of 25F, fuel volatility might be so low, due to old fuel, that an ignitable mixture was not formed.

The carb does have a cold starting device (TN), separate from the conventional choke.
fuel is definitely old.....thanks

__________________
0o==o0

James 4:8

"...let us put aside the blindness of mind of those who can conceive of nothing higher than what is known through the senses"
-Saint Gregory Palamas, ---Discourse on the Holy Transfiguration of Our Lord God and Savior Jesus Christ


Centrally located in North East Central Pa.
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