Having trouble starting in cold weather

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Basin_Runner355
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Having trouble starting in cold weather

Postby Basin_Runner355 » Mon Dec 19, 2016 10:12 am

I have a zz4 350 and in the morning it's a bitch to get it started and keep it running when temps are below 40 any tips to get it to pop off and stay running.

My procedure turn key on let fuel pump run for Bout 10 seconds and tap gas couple times. And turn key and hope it stays idling it will idle For few seconds and then die gota do that quite a few times before it'll let me rev it up to keep it running
14ft diamond back zz4 355sbc 2:1 belt drive reduction with a 78 water walker falcons pitched at 5200

swamper2
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Re: Having trouble starting in cold weather

Postby swamper2 » Mon Dec 19, 2016 10:30 am

if you have automatic choke it will need adjusting
16ft alumitech/406sbc/2.38w/3-80in.R's

Basin_Runner355
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Re: Having trouble starting in cold weather

Postby Basin_Runner355 » Mon Dec 19, 2016 10:34 am

I have a demon carb and idk how to adjust it
14ft diamond back zz4 355sbc 2:1 belt drive reduction with a 78 water walker falcons pitched at 5200

Basin_Runner355
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Re: Having trouble starting in cold weather

Postby Basin_Runner355 » Mon Dec 19, 2016 10:46 am

I don't know if it has one or not. I just got this boat a month ago still learning
14ft diamond back zz4 355sbc 2:1 belt drive reduction with a 78 water walker falcons pitched at 5200

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John Fenner
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Re: Having trouble starting in cold weather

Postby John Fenner » Mon Dec 19, 2016 12:00 pm

Get it fired up, then while idling, back the idle mixture screws out equally on both sides 10° at a time till it fattens up, it should start much easier, you will have to reverse this process when it warms up, it may tend to diesel if idle speed too high.
I never finish anyth,,,.

swamper2
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Re: Having trouble starting in cold weather

Postby swamper2 » Mon Dec 19, 2016 3:42 pm

Basin_Runner355 wrote:I have a demon carb and idk how to adjust it

good time to learn. go on line You tube and search demon carb coke adjust or go to demon carb web site.
16ft alumitech/406sbc/2.38w/3-80in.R's

Basin_Runner355
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Re: Having trouble starting in cold weather

Postby Basin_Runner355 » Mon Dec 19, 2016 4:17 pm

I asked my mechanic who just went through the carb he said it don't have a automaic choke
14ft diamond back zz4 355sbc 2:1 belt drive reduction with a 78 water walker falcons pitched at 5200

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pontoon outlaw
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Re: Having trouble starting in cold weather

Postby pontoon outlaw » Mon Dec 19, 2016 7:46 pm

:scratch: I run a Jegs electric pump and I learned that when ya start it don't touch he throttle for a minute till you hear the rpm's going up then pat it and she runs smooth, I got a 507 Cad, with a Roberts box and when it's cold like that it cranks with that process every time :) but, if ya hit it too early then it won't rev up and stalls sometimes///

swamper2
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Re: Having trouble starting in cold weather

Postby swamper2 » Mon Dec 19, 2016 8:05 pm

Basin_Runner355 wrote:I asked my mechanic who just went through the carb he said it don't have a automaic choke
you need a choke . Manual or automatic or sit with it till it stays running
16ft alumitech/406sbc/2.38w/3-80in.R's

Basin_Runner355
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Re: Having trouble starting in cold weather

Postby Basin_Runner355 » Tue Dec 20, 2016 7:13 pm

I took it again this this morning and it was below freezing and I learned that don't hit the gas just keep starting it and let it idle took 3-4 times before it would idle it don't get that cold down here that often
14ft diamond back zz4 355sbc 2:1 belt drive reduction with a 78 water walker falcons pitched at 5200

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harsensmarshrat
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Re: Having trouble starting in cold weather

Postby harsensmarshrat » Wed Dec 21, 2016 8:18 pm

Block heaters work really good up here in the north. I think tractor supply carries universal ones. My diesel truck has one and it makes a huge difference if is use it or not....

lamarineandprop
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Re: Having trouble starting in cold weather

Postby lamarineandprop » Sat Dec 24, 2016 12:15 am

He can't run a blockheater where they hunt. I'd bring it back to nick and get him to mess with the choke that's your problem most likely.

terrible ted
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Re: Having trouble starting in cold weather

Postby terrible ted » Sat Dec 24, 2016 8:43 pm

I have fords that would not start in the cold because the choke was closed would stick a pen in it to start. Now I also had cars with air rams and that no good in the real cold weather. I know on a aircraft your problem means a bad accelerator pump. I never had the problem on any of small blocks.

Dr.Dan
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Re: Having trouble starting in cold weather

Postby Dr.Dan » Sat Dec 24, 2016 10:38 pm

It's very simple. Use a properly adjusted choke to start a carb in cold weather.

The OP has the option of either adding a choke or just tolerating it until the engine warms up.

Whether it's worth adding a choke just depends on how often you run in the cold.

dd

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Rick McC.
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Re: Having trouble starting in cold weather

Postby Rick McC. » Wed Jan 11, 2017 11:13 pm

I have a dual feed 750 Holly with manual choke that I keep locked open with a zip tie on the linkage.

It cranks and runs no matter what.

Engine is a 425 HP 454 Edelbrock crate moror.
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terrible ted
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Re: Having trouble starting in cold weather

Postby terrible ted » Thu Jan 12, 2017 8:34 am

Rick McC. wrote:I have a dual feed 750 Holly with manual choke that I keep locked open with a zip tie on the linkage.

It cranks and runs no matter what.

Engine is a 425 HP 454 Edelbrock crate moror.


I have to say i never ran a choke on any of my hot rods they would fire up with a bump of the key. If it fires up cold with a shot of gas poured in the carb theirs a fuel supply (carb) issue.

Did you figure this out yet

One Eyed Gator
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Re: Having trouble starting in cold weather

Postby One Eyed Gator » Thu Jan 12, 2017 8:56 am

If it is a demon it may have the EZ-idle circuit. There is a screw at the bottom of where the air cleaner stud is installed. Set curb idle, idle mixture screws then use EZ idle circuit to readjust idle.

Get demon website and check out the tuning instructions.

This help keep the transfer slot open where it should be and still allowing for idle adjustment.

BTW if you have stock cam with high vacuum it will difficult to get A/F correct at idle. And I have also never run a choke on make hot rod or any airboat.

SWAMPHUNTER45
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Re: Having trouble starting in cold weather

Postby SWAMPHUNTER45 » Thu Jan 26, 2017 9:11 pm

For the youngsters who may not have grown up in the carburetor generation let me outline the proper method to start a COLD engine with an automatic (electric) choke.

1) Turn on ignition power source / key
2) Turn on fuel supply if electric pump
3) Depress pedal to floor two full pumps. (This sets choke and squirts fuel in to prime a cold engine)
4) With foot off the pedal turn key...engine should start
5) As engine warms it increases rpm, after warm slightly depress pedal increasing rpm to remove choke.
6) Engine should now run at a normal idle


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