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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    I had them test it with the prop on in forward and reverse in their large tank. I also asked about warranty and was told 90 days so we will see.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Picked the boat up yesterday and I had them start and run the motor for some 30 minutes. It ran just fine with no issues. When I asked what the issue was the mechanic said he wasn't sure but said it was a vacuum issue and he pointed out all the parts he had replaced which included: Mini 10...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Well, I got tired of swapping out parts and took the boat to a Yamaha dealer. They said it would be about 2 weeks and $149 an hour. They called after the 2nd day and said they needed to replace fuel lines, bulb and fittings before they could go any further and of course everything had to be...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Been raining here on and off for the past few days but will get back to checking things. Plan on replacing fuel lines and clamps to begin with.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    I replaced the fuel pump today started the engine. It ran fine, idled down as it should and ran for some 35-40 seconds before some chirping, misfire noises and it died. I pulled the fuel line coming out of the pump and cranked the engine over and observed the amount of fuel it was pumping. It...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Using timing light in the bright Texas sunlight I read 2-4 degrees BTDC is where I can get the motor to run and stay running. This reading was done before changing out the CDI Box. The new box was not exactly plug and play because the metal pointer, needle arrow on the new CDI Box was flat and...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    I will get the new CDI Box on Tuesday and check all the settings again and also check the timing setting needed to run the motor before I install the new CDI Box. Should know if the problem is fixed sometime on Wednesday. Thanks, Tom
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    I am not where my boat is so cannot verify what the timing was when motor was running properly but if you look at the photo of the CDI box and you can see the pointer is somewhat between the 7 degree hashmark and the 25 degree hashmark. A rough estimate would be about 12 degrees.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    I guess I have to bite the bullet and buy a new CDI unit 117-63D-04 which replaces 63D-85540-02-00 . Here is a picture of where the pointer on the CDI Box has to be for the motor to run. I know of no way to make that much of adjustment. Am I correct in thinking the CDI Box needs to be replaced?
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Got to look a little deeper into my engine today. Disconnected the oil sensor plug on oil tank side. Buzzer went away. Pulled all 3 carbs and went through checking and cleaning, no issues noted. Did the link and sync checking specs as per repair manual. I accidentally got the engine to run...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Well 1 step forward and 2 back today. Got the parts I needed and first off noticed the old oil sensor wiring had a modification somebody had done. The harness out of the sensor consists of 4 wires, a black (ground) a pink, a green and a green with red stripe. At the plug end of the harness...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    The oil pump linkage is what I was referring to that will need to be adjusted after new plastic connector is installed. I believe chapter 4 in my repair manual may cover adjustment info I need.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Linkage is located below oil reservoir and is connected to bottom carb and throttle linkage. Part of the autolube system. Boat and motor are kept some 30 miles from home (present location) so pictures are not currently available. will get back out there sometime this week to install new oil...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Unable to find information on adjusting the oil sensor linkage for this 2001 Yamaha 50HP TLRZ 2 stroke in my repair manual. Help appreciated.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Did a little more checking today and decided to check the oil sensor and it failed the test. Also discovered the plastic clip on the oil linkage to the bottom carb was broken. Will get replacement parts and go from there.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Got around to installing the new O ring between rain showers. Made no difference and was not the problem. It gets gas, ball stays hard/firm, have spark on all 3 plugs. It acts as if someone turns the key off when it dies, no coughing or sputtering. Will start right back up immediately and run...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    A friend of mine did the replacement of the center carb. He knows hot rods but boat motors not so much. I do not know if the new center carb that was purchased came with that O ring or not but I know it is missing now. I too hope that is the issue.
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Well I got side tracked a little bit working on some hot rods and got back to my boat motor today. Long story short I believe I solved the issue of not running longer than 30 seconds. After doing a bunch of voltage tests etc. I took off the carbs and discovered the center carb was missing the...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Runs the same no matter what position the prime start lever is in. Starts with first turn of key and idles up for some 8-10 seconds during warm up but then idles down to about 1500 RPM as it should. Has about 30 seconds run time after starting. Plan on doing some voltage/ohm checks tomorrow...
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    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    Well after replacing the center carb and rebuilding the top and bottom carbs the engine fires right up in the normal position, runs for about 30 seconds and dies. No sputter at all it's as if you turn the key off. It will fire right back up again, run for about 30 seconds and die. Have checked...
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