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    Numbers on OX 66 CDI

    Thank You
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    Numbers on OX 66 CDI

    Years of owing this engine could never find the exact year and model , With help of others we determined engine year is around 2000 -2001 2000 250 HP 2 stroke Using SX 250 TRXY Every part ordered worked fine Pulled the CDI too correct wiring issues and noticed a series of numbers on CDI...
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    OX 66 Trim & Tilt

    2000 OX66 250 HP Part # 6 1 A-43800-25-4D Seals were leaking , changed Release valve would not open Should have left alone since it was working , BUTTTTT no anal me had too make everything perfect Now unit not holding pressure , stripped head of release screw , tried drilling out and...
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    Yamaha OX 66 Trim & Tilt motor cylinder

    2 stroke 250 HP Leak in seals , Replaced Was able too move drive up by adding fluid , Release screw Rusted in place , Eventually flat head of screw stripped , Tried screw extractor , Nothing worked Drilled it out, fluid came out , but not gushing Drilling new thread I went further and...
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    2000 OX 66 - trim & tilt release nut and new seal

    Seal on trim & tilt cylinder is leaking ( fill cylinder ) Got the tool and two new seals , ( not just the rubber ) I see there are 3 seals which I did not realize when I ordered Bad seal removed , Cylinder loaded with water , Problem I am having is loosing the release screw , Starting...
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    2 stroke oil reserve tank over filling with fuel ???

    Follow up , Fixed , Fuel got into oil tank cause of two issues , Oil check valve was ng , Needle in vst tank was not sitting correctly causing fuel too over fill , Since check valve was ng fuel had no place too go but back flow into oil system , When reserve tank filled it dumped into bilge ...
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    What is considered correct float height , OX 66

    2000 OX 66 250 HP 2 stroke Posted few weeks ago , this is a follow up I had a crazy thing happen , Fuel was back flowing into oil tank , reserve oil tank , reserve tank was overfilling dumping oil & gas into bilge . Many said this is impossible , but this is what happened , float was...
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    Check valve not available , alternative options

    Thank You , never thought about ebay , Prior Contacted all major suppliers , Yamaha had it on BO , Engine is old , parts getting hard , Really did not want too use auto valve , or by pass , will fabricate when I must but prefer oem parts Seller on ebay had new one still in package ...
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    Check valve not available , alternative options

    2000 Yamaha OX 66 2 stroke 250 hp SX250TXRY PART # 65L13183-00-00 This part is the check valve in the oil line going too VST tank Had back flow of fuel into oil reservoir. float not stuck can blow air thru both sides of check valve , plus cleaner when spayed in comes out both sides ...
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    2 stroke oil reserve tank over filling with fuel ???

    Just noticed a few responded from my last post , sorry I reposted , going too swap out check valves and make sure float is not stuck ,
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    2 stroke oil reserve tank over filling with fuel ???

    2000 OX 66 2 stroke 250 HP After a day on water removed drain plug , Smelt gas Puddle of oil * gas, bilge ? Axillary tank over filled with gas and traveled into bilge , ? Opening reserve oil tank had a gas smell Same with oil tank on engine Months prior new Carter fuel pump in VST...
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    2 stroke oil reserve tank over filling with fuel ???

    I agree with you , I have a retired marine mechanic buddy , he looked at it yesterday , He said this is a first , He feels its the check valve causing back flow ??? He said if you cant fix it , just by pass and run 50:1 directly , as a last resort but want it running as it should
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    2 stroke oil reserve tank over filling with fuel ???

    2000 OX 66 =250 hp - 2 stroke yesterday , pulled boat , pulled drain plug water coming out was clear , then oil was mixing with the water with a smell of gas coming out ? Never had a problem with 2 stroke oil system gas is returning & over filling 2 stroke external reservoir . ( reason...
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    Options too move up trim & tilt

    2000 OX 66 250 hp 2 stroke My trim tilt works but Curious what too do Drive boat onto trailer , find out my trim tilt stops working , I see one option is too open bolt releasing hydraulic pressure on trim tilt pistons , Can one person move it up or more required , ( ratchet...
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    Drive held pressure but still leaks out , water in

    Yes oil was milky but not as bad as when I dropped it before I changed seals Did soap spray , no bubbles top & bottom
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    Drive held pressure but still leaks out , water in

    What do you mean by not doing me any favors ? Thermal Expansion Never indicated, it was 20 or so minutes over two days, Just a moment ago I pumped 12 PSI into vent whole Holding , Understand most water intrusion is the prop shaft , I changed all 3 oil seals & screws with washers, If any of...
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    Drive held pressure but still leaks out , water in

    2000 OX 66 2 stroke 250 Hp SX 250 TXRY Had water in drive Purchased OEM Yamaha prop shaft seals , top seal , shift shaft seal Never considered doing a pressure test too determine which seal is bad , jut changed them all New screws and gaskets vent & drain Pumped 12 PSI , did soapy water test...
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    self leveling or motorized trim tabs

    22 ft grady white , seaferer 250 yamaha boat never had any trim tabs when i open up leans too starboard leaning towards self leveling , your thoughts self or motor leveling , what size plate ?
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    2 flat & wavy washers along with plastic washer not under impeller cover ?

    2000 OX 66 250 hp SX250TXRY shifting was ok prior too oil seals upyper & lower, plus shift selector seals , impeller , gear lube , OBs was new too me coming from IOs According to diagram 2 washers and 1 wavy washer along with plastic ring go under metal cover There was none on my shaft ...
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    Gears grinding after re- install drive

    2000 ox 66 2 stroke 250 hp pulled drive too change impeller top seals , bottom seals shift seal gear oil change ( water intrusion ) throttle in N did not move shifter while changing seal , shifter not easy too move without vice grips Installed drive gears grinding , forward slight grind...
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