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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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    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

    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 ???

    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

    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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    oil injection fittings , tip broke

    2000 TXRY yamaha OX 66 2 stroke ( obviously ) 250 hp oil injection hose on starboard side had crack leaking oil I should have known better but when I put a little force too remove and replace the tip of of fitting broke off into hose Of coarse location is very bottom bit tight but i can...
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    Starts then no start

    2000 ox 66 2 stroke 250 hp I had two issues same time , believe I corrected one , No spark starboard side all 3 cylinders , Found yellow wire into CDI crud and tips making no contact , New connection and now have spark OR A WEAK STATOR ( will explain ) Starting issue cold start ...
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    Water Separator , larger filter verses smaller filter

    Motor is a 2000 - 250 hp - 2 stroke - fuel injected SX -250 TXRY , Question regarding fuel - water separator 3232 Racor - presently installed on boat , larger filter with plastic base verses 3214 - smaller in size - clear base both 10 micron wanted too install 3214 - since there is a...
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    Low Pressure Pumps - Yamaha

    2000 OX 66 250 hp 2 stroke fuel injected fuel priming issue , Difficult cold starting , once started , can shut and start over & over sit 1/2 hr , difficult starting again , Ball gets hard then soft What I did find out , one of 3 low pressure pumps leaks from back , TESTING LOW...
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    Yamaha ignition coils

    OX 66 1999 2 stroke 250 Hp fuel injected compression all 6 cylinders 120 Dont know model # ran fine , week later ran like crap , symptoms - not able too idle , not able too throttle up stalling before I could get into gear , - backfiring , - running like i was on 3 cylinders...
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    interment spark no spark

    2000 yamaha OX 66 2 stroke 250 hp fuel injection no engine model number Interment spark issue starboard side on all 3 coils ????? Port side OK work , dont work , work , dont work HUH ? leaning too computer issue , Plan is go thru each connection , check all grounds, maybe a...
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    Explain how fuel system works OX 66

    Cranking will not start 2000 OX 66 2 stroke 250 hp fuel injected Getting spark on all 6 coils , ( tested with spark tool at night ) got it too fire up briefly - shut Back too start will not , , ONLY CRANKS -away Leaning towards fuel pump , will check wiring getting familiar...
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    COIL INFO

    yamaha ox 66 2002 2 stroke 250 HP dont know model number number on spark plug wire boot , TD -T -132 was testing spark off coil , with spark tester , ( another person turning key ) got a shock # 5 is plug wire with coil sold one unit ? boot unscrews , end going into coil...
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