Where to start?

whitetailhntr · Nov 22, 2015

I have a 15hp Johnson that runs great once its warmed up but takes 10 pulls to get it started when cold. Most of the time i have to put it in gear and turn the throttle jus enough to not engage the stop ear on the flywheel to make it start. Any suggestions on where to start to make this a little friendlier to start? Thanks

richg99 · Nov 22, 2015

There are way smarter people than I that will soon pipe in....but most engines have a way to increase the fuel flow without putting it into gear.

The choke system does that. Have you looked at that setting?

richg99

whitetailhntr · Nov 22, 2015

Setting for the choke?

richg99 · Nov 22, 2015

Remember that I know less than many on here, but..

.I normally put full choke on until the engine starts... Then slowly back the choke off...

whitetailhntr · Nov 22, 2015

richg99 said:
Remember that I know less than many on here, but..

.I normally put full choke on until the engine starts... Then slowly back the choke off...

Even with doing that still issues

Pappy · Nov 22, 2015

First thing to do is visually check and see that the choke blade is fully closing. If someone has been into the carburetor there is a chance the black plastic choke knob/shaft is upside down. If it is then there is a chance it is not closing.

Gamefisherjon · Nov 22, 2015

^ ive seen it happen as well, i would search for pictures of your engine models carb assembly on the internet and look for something obvious or put on backwards or wrong, if you verify that the carb is correct try pumping the inline primer ball more before you try and start the engine

94 xlt 5speed 3.0v6

richg99 · Nov 23, 2015

I've always has good luck by putting in new, gapped, plugs.

richg99

RandysJav · Nov 23, 2015

92 OCTANE fuel. Made my 1988 Evinrude 2-stroke 9.9 go from a ten pull to a three pull. Will never use low octane ever again. Randy

whitetailhntr · Nov 24, 2015

RandysJav said:
92 OCTANE fuel. Made my 1988 Evinrude 2-stroke 9.9 go from a ten pull to a three pull. Will never use low octane ever again. Randy

Ill try that

whitetailhntr · Dec 1, 2015

Recoil rope broke now....uhhhh the issues

onthewater102 · Dec 2, 2015

Octane rating shouldn't matter for startup.

bonz_d · Dec 2, 2015

I'm thinking it has a fuel issue and may need the carb cleaned. Primarily the low speed idle circuit. We have a 1960 18hp Johnson and a 1969 9.5hp Johnson and both of those normally start on the 1st pull after they've been run for the 1st time each season.

Also check the spark with an open air gap spark tester. A good spark will be bright blue and jump a 1/2" open gap. These testers can be found at any auto parts store for about $10.00

whitetailhntr · Feb 29, 2016

Is there a certain size pull rope i need? Thickness wise? Or will any work?

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Pappy · Feb 29, 2016

Am thinking it is 5/32" but don't shoot me if I am wrong! Going off of memory only.

whitetailhntr · Feb 29, 2016

Pappy said:
Am thinking it is 5/32" but don't shoot me if I am wrong! Going off of memory only.

That is correct I found it on another forum. It's the same as number five lawn mower rope

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whitetailhntr · Feb 29, 2016

Will need 68.5 inches

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