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89Johnson outboard motor ....Hard to start


MWJ
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When cold starting, this motor will fire the first flip everytime but will not continue running. No problem when hot. To get it started I have to move manual throtle to 3/4 open and then it revs to high. adjusting fuel did not help. I have run out of ideas. Motor runs and trolls great.

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Clean the carb, and clean up all of the ports. re-do the gaskets on it, check the reeds consider replacing them. 
 

run seafoam heavily through it. 
 

check the cylinder compression, if it’s low you may have a bad ring/gouged wall and are losing compression.

 My assumption is that your carb is just gunked up. But I’m a little concerned that it runs really fine once it’s warm…that can mean that once things are warm and expanded they seal up nice. Aka when it’s cold you don’t have enough compression to keep the motor running.

 

 Don’t ever run gas with ethanol in it ever again.

Edited by AKRISONER
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Ok thks. Was my next plan.  When I mentioned warmed up,I really meant ounce it fired up it does not skip a beat when still cold. Was wondering about linkage adjustment. But I plan on cleaning the carb.

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These old OMC are a little cranky. Trim your motor so it's level . Because the carbs are at front of motor the float bowls aren't  full if trimmed up and they don't start great. Trim level and they start much better.

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Real questio is were to find ethanol free gas?

 

Was just informed last  week shell and canadain tire will not be offering a ethanol  free  selection any more. Premium was last month.

 

As for the "cold start" what i used to do is place into  foward gear squeeze ball 3/4 times back to natural turn key,fired right up.

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13 hours ago, strik said:

Real questio is were to find ethanol free gas?

 

Was just informed last  week shell and canadain tire will not be offering a ethanol  free  selection any more. Premium was last month.

 

source for this? Canadian Tire has always been my go to. The other spot i go is in curve lake, they have marine fuel ethanol free

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Just an experiment. When done for the day, disconnect the fuel line at the motor and let the motor/carb run out of gas. The next day plug fuel line back, pump the bulb until it has fill the carb's bowl, then try your normal stating routine. If it starts and runs better; it's likely that the small amount of fuel in the carb has gone stale (yes even over night) and lost its volatility. The fuel in the carb is exposed to the atmosphere; alcohol fuel loves to give up its essentials to burn and absorbs moisture. The fuel in the tank and hoses at not exposed to the air or shouldn't be with a good self venting cap and or you closing the vent at the end of the day. Just for worst and giggles give it a try?

Dan...     

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On 6/16/2022 at 9:37 PM, CrowMan said:

If you can't find ethanol free...then you definitely want to add a fuel treatment. 

I have been running ethanol blend fuels for years. No problems at all. But I use a stabilizer religiously. And I Use it up every season. Or I run it down low so I can mix fresh in at the new season. Never had fuel or ethanol related problems

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