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Starting procedure #1338628 Sat Dec 21 2019 09:57 PM
Joined: Jan 2018
Posts: 309
B
Bill Trotter Offline OP
Shop Shark
Just about done with my first resto of a 37 1/2 ton. Have a 1957 235 with Rochester BC. When starting should the accelerate be pumped before engaging the starter? Since I have been driving new trucks with fuel injection have not driven a older vehicle since the 70's. If my memory serves me right that's what was done with a carberated engine. Any tips will help a new guy to these old trucks. Thank you Bill

Re: Starting procedure [Re: Bill Trotter] #1338629 Sat Dec 21 2019 10:11 PM
Joined: Sep 2001
Posts: 29,267
tclederman Offline
Boltergeist
I think that I pumped it once (slowly, to the floor - then, release) - but, my memory is a little dim because I have not started it in over 3 years.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Starting procedure [Re: Bill Trotter] #1338631 Sat Dec 21 2019 10:16 PM
Joined: Mar 2017
Posts: 206
L
LeeD Offline
Shop Shark
Bill,
My best advice is to try starting it with different procedures and see what works best. When I had a Rochester carb on my 235, all I did when the engine was cold was to pull the choke out most of the way and it fired right up without any pumping on the gas pedal. As soon as it started I would ease the choke most of the way in and drive off; opening the choke completely in the first mile. My Carter takes a little different procedure.
Lee.


1956 Chevy 3200, 235 w/3 speed
Re: Starting procedure [Re: Bill Trotter] #1338633 Sat Dec 21 2019 10:30 PM
Joined: Jan 2018
Posts: 175
4
4100 Fire Truck Offline
Shop Shark
It depends on how cold it is too. I give it a pump or two, and choke pulls a little easier if you hold the throttle partway down. It starts right now, and runs like it's fuel injected, with the heat riser working. If it doesn't start in less than 5 seconds I did something wrong. This is on an original 1950 216 with only 2500 miles on it.

Last edited by 4100 Fire Truck; Sat Dec 21 2019 10:36 PM.
Re: Starting procedure [Re: Bill Trotter] #1338635 Sat Dec 21 2019 10:33 PM
Joined: Sep 2001
Posts: 29,267
tclederman Offline
Boltergeist
Yes, hold the throttle partway down, as described by 4100 Fire Truck (thanks for the correction/addition).


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Starting procedure [Re: Bill Trotter] #1338637 Sat Dec 21 2019 11:22 PM
Joined: Apr 2007
Posts: 682
L
Lightholder's Dad Offline
Shop Shark
If my memory serves me correctly, the reason to pump the accelerator first is to set an automatic choke. Unless you have a carburetor with an automatic choke there is no need to pump first. Just pull the choke if cold, which will also cam the throttle up slightly. You can also use the throttle cable to up the throttle. Another point is that once hot, and the truck sets for 10-15 minutes, you may have difficulty getting the engine to start. This is especially true in AZ summertime in the low deserts. I give credit to Carbking and his website for informing us that you must depress the throttle open (don't pump) to start a hot engine that has set awhile, causing perculation of gas down the carb. You need more air, thus the open throttle, to get the engine to fire.
Kent

Last edited by Lightholder's Dad; Sat Dec 21 2019 11:24 PM. Reason: typo

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: Starting procedure [Re: Bill Trotter] #1338638 Sat Dec 21 2019 11:26 PM
Joined: Sep 2001
Posts: 29,267
tclederman Offline
Boltergeist
Yes, hold the throttle-pedal part way down, as described by 4100 Fire Truck (thanks for the correction/addition).


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
Re: Starting procedure [Re: Bill Trotter] #1338640 Sat Dec 21 2019 11:44 PM
Joined: Jul 2000
Posts: 829
G
Gord&Fran Offline
Shop Wrasse
Bill said it's a model BC. The C means automatic choke.

For automatic choke, you should have to press the pedal once to allow the spring on the carb to close the choke and set the fast idle cam.


Gord
----
1954 1/2 ton 235 4 speed
Re: Starting procedure [Re: Bill Trotter] #1338641 Sat Dec 21 2019 11:51 PM
Joined: Jan 2018
Posts: 309
B
Bill Trotter Offline OP
Shop Shark
Thanks to everyone who replyed. Temps are supposed to be in the 40's here in the U.P. of Michigan so going to pull out of garage and do some starting tests. Bill

Re: Starting procedure [Re: Bill Trotter] #1338642 Sat Dec 21 2019 11:54 PM
Joined: May 2001
Posts: 1,347
W
Wally / Montana Offline
Shop Shark
I give mine 2 or 3 taps but not to the floor. No taps at all for the rest of the day.


1948 3/4-Ton 5-Window Flatbed Chevrolet

28 Years of Daily Driving. Now with a '61 261, 848 head, Rochester Monojet carb, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.

Moderated by  Justhorsenround 

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