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  1. #1
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    hard starting yamaha 2001 90 hp 2 stroke

    This motor has the auto priming system no choke at all. It has always been hard to start after it sets for a week or longer.The only way to get started is to give it a shot of starting fluid in the air intake the first time in the morning. Has anyone have any idea about getting this motor started for the first time or why it won't start. Thanks in advance, Mike

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  3. AB
    AB is offline
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    #2

    Re: hard starting yamaha 2001 90 hp 2 stroke (mkspw)

    Ok, I'll be honest, I haven't heard of an "auto priming system" on a Yamaha before. If you are pumping the bulb up tight, and the motor refuses to fire first thing in the am then it has to be something in the choke circuit preventing it from getting the nessecary amount of fuel when it is cold. Does the auto prime inject fuel into the intake or does it take control of some sort of choke plates?

    Can you post your model number, I'd like to take a look at some schematics for it on the Yamaha site....




  4. Member
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    #3

    Re: hard starting yamaha 2001 90 hp 2 stroke (mkspw)

    Mike Yamaha carbed motors don't like to sit for more than a week or so without being run. The evaporating fuel in the carbs gums up the fuel passages and jets and makes starting difficult at best. You have a fuel enrichment solenoid on the port side of the lower carb along with the "prime start" little mechanical fuel pump mechanism. It's probably gummed up and needs to be removed and cleaned out with some carb cleaner (Berryman's Chemtool spray - Walmart). In the future use a fuel stabilizer in your fuel tank, like Sta-Bil (Walmart) or Sea Foam (Advance Auto stores...). This will help keep the fuel from gumming up the carbs. You can bypass the electric "prime start" solenoid by opening the "emergency start" valve that's also located down there behind the port side of the air cover. Try opening it and starting the motor cold, if it fires right up then yes your electric solenoid is gummed up.


    Mike


    Hold My Beer And Watch This !

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    #4

    Re: hard starting yamaha 2001 90 hp 2 stroke (AwesomeBullet)

    this a model 90 tlra primary id 6h1l 0513508 Thanks, Mike

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