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Author Topic: Idle Screws on a Jiffy Model 30  (Read 5007 times)

Jrod0582

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Idle Screws on a Jiffy Model 30
« on: Feb 01, 2010, 11:50 AM »
anyone have any advice for adjusting the idle screws on a jiffy model 30 (about 10 years old)? I made some adjustments to the screws because I wanted it to idle a little smoother but now when I am drilling a hole my auger will bog itself all the way down and die very quickly. it will idle and rotate at normal speed as long as I am not drilling into the ice so it is almost as if I lost nearly all of the power that used to tear right through the ice. Any and all suggestions would be greatly appreciated!

bighof

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Re: Idle Screws on a Jiffy Model 30
« Reply #1 on: Feb 01, 2010, 11:56 AM »
Doesn't sound like an idle adjustment problem... check your air filter first if this doesnt help you may have to adjust your air/fuel adjustment.

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Keith Walters

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Re: Idle Screws on a Jiffy Model 30
« Reply #2 on: Feb 01, 2010, 12:09 PM »
You probably have two adjustment screws.  One for idle and one for high speed.  You may have turned the wrong one. 

Keith

toothfish

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Re: Idle Screws on a Jiffy Model 30
« Reply #3 on: Feb 01, 2010, 12:18 PM »
I wish I had a nickel for every time I was asked about carburetor adjustments .

Here are the facts :
1 Why would the carb become out of adjustment ? Jets DON"T turn with vibration .
2 Someone with a screwdriver can screw things up royally .
3 99.9 % of the time a carb adjustments are not at fault.
4 The problem can range from ice plugging the air filter - carb diaphragm gummed or stiff - plugged exhaust ports - scored or damaged piston/cylinder - fuel contamination /quality - leaky engine seals to ...................... ...................
5 Take to a qualified technician /shop .

    "Central Iowa Anglers"

ice dawg

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Re: Idle Screws on a Jiffy Model 30
« Reply #4 on: Feb 01, 2010, 12:18 PM »
ADJUSTING TECUMSEH 3 HP CARBURETOR
pop the red caps off.

Close both jets GENTLY

Open the Low speed 1/4 turn

Open High speed jet 1 1/4 turn

Start engine.

Adjust low speed until idling smoothly.

Open her up wide open.

Adjust High speed until engine transitions smoothly from idle to high speed without bogging.

Shut engine off. Let it cool.

Once engine is cold. Fire it up and let it idle for 30 secs. Open it up wide open again. Adjust if necassary.

The trick with the Jiffy's is to tune them during cold (ice fishing) weather.

Low speed screw,the one on the left.

High speed on the right.
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Rebelss

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Re: Idle Screws on a Jiffy Model 30
« Reply #5 on: Feb 01, 2010, 01:02 PM »
ADJUSTING TECUMSEH 3 HP CARBURETOR
pop the red caps off.

Close both jets GENTLY

Open the Low speed 1/4 turn

Open High speed jet 1 1/4 turn

Start engine.

Adjust low speed until idling smoothly.

Open her up wide open.

Adjust High speed until engine transitions smoothly from idle to high speed without bogging.

Shut engine off. Let it cool.

Once engine is cold. Fire it up and let it idle for 30 secs. Open it up wide open again. Adjust if necassary.

The trick with the Jiffy's is to tune them during cold (ice fishing) weather.

Low speed screw,the one on the left.

High speed on the right.
______________________ ___

Dawg is totally correct. Sounds like you leaned out your high speed. Leave it outside before you tune it. You may have to open it up even a bit more when you get it under load. Always use good, clean, fuel, (Non-oxy if you can find it), and a fuel stabilizer like Stabil or Sea Foam. Good maintenance prevents 99% of problems.

                                   

"You can't please everyone, so you've got to please yourself"...Rick Nelson/SCB '72

Jrod0582

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Re: Idle Screws on a Jiffy Model 30
« Reply #6 on: Feb 01, 2010, 01:27 PM »
you guys were completely correct! my high speed idle screw was turned way down, I opened her up and can tell that the power was restored, I really appreciate the help gentlemen!

eriksat1

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Re: Idle Screws on a Jiffy Model 30
« Reply #7 on: Feb 01, 2010, 07:10 PM »
I am having the exact same problem with mine, I just keep playing with the choke and pumping the primer once in a while when it starts to die out, I wasn't sure how to adjust the carb so I have just been playing with it till I get my holes drilled. I will try this adjustment tomorrow and report back.
"Give a man a fish and he will eat for a day. Teach him how to fish, and he will sit in a boat and drink beer all day."

eriksat1

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Re: Idle Screws on a Jiffy Model 30
« Reply #8 on: Feb 05, 2010, 07:20 AM »
I have to give "ice dawg" a big THANKS. I did what you said and my 15 year old Jiffy hasn't run this good since it was new. I know over the years I have played around with those carb screws but never did it right. Now I only have to use the choke the very first start up, after that it starts right up with no choke and has no more hesitation from low speed to high, and I don't have to keep playing with the choke to keep it running at times. Thanks again.
"Give a man a fish and he will eat for a day. Teach him how to fish, and he will sit in a boat and drink beer all day."

JJK

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Re: Idle Screws on a Jiffy Model 30
« Reply #9 on: Feb 05, 2010, 08:58 AM »
I have beeb also having the same problems, like everyone else I am also going to try this ,thanks Cheers JODY
As long as I breathe I will fish as long as I can

mcdee

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Re: Idle Screws on a Jiffy Model 30
« Reply #10 on: Feb 05, 2010, 09:19 AM »
Those jiffys need two adjustments one for warm days and one for cold .Maybe someday Jiffy will add that adjustment so you can just turn a knob for cold or warm days  ;)

ice dawg

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Re: Idle Screws on a Jiffy Model 30
« Reply #11 on: Feb 05, 2010, 10:01 AM »
Those jiffys need two adjustments one for warm days and one for cold .Maybe someday Jiffy will add that adjustment so you can just turn a knob for cold or warm days  ;)
Good idea. You may want to include Strikemaster and others that use Tecumseh engines also. lol Mine is a 2 hp and doesn't give me any problems.
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icefishindaddy

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Re: Idle Screws on a Jiffy Model 30
« Reply #13 on: Feb 05, 2010, 02:11 PM »
Heres a link to Tecumseh engines.  It helped me alot on rebuilding my older jiffy and it works great now.
http://www.cpdonline.com/692508.pdf

You can look up the page you need and then print it out to take into the shop with you.
Good luck

 

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