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you may have lost fire spark on one bank of cly that motor has 2 charge coils on the sator one for each bank of cly it will start and run on 3 cly but will not turn up rpms I am a cert yamaha tech from 1985 to date I am head tech at grady white yamaha dealer in south fl I have been a tech for...

Call 1-877-310-2628 or go to web site NWFL OUTBOARD. Look at motors for sale on site and call them 2 they have more motors that r not on website and a great machine shop 2. they can help u. they have a lot of rebuilt motors.

I WOULD MOVE IT TO.WE HAVE ONE SMALL GUY AT OUR SHOP JUST FOR THAT KIND OF JOB. IT IS HARD TO GET TO AFT PUMP IN THAT MODEL NO EASY FIX. JUST MOVE IT.

Re: why respace engines when repowering from 2 stroke to 4 s I HAVE BEEN ON 28 GRADYS THAT GOT REPOWERD WITH 4 STROKE AND DID NOT MOVE MOTORS TO 32 1 /2 SPEC PER GRADY.THE BOATS DO NOT TRACK WELL AND THE BOW IS DOWN. I SPENT A HOLE DAY RIDING THE BOAT AND NO MATTER HOW U RUN TABS OR MOTORS...

THE ANTI SIPHON IS UNDER ROUND COVER ON DECK OF BOAT IT WILL BE THE REAR ONE IS THE ACSESS TO IT AND THE FUEL SENDER. PULL THE PICKUP OUT AND CHECK THE SCREEN 2 .ALL GRADYS HAVE A ANTI SIPHON WHEN IT IS NEW. SOME ONE MIGHT HAVE REMOVED IT BEING A 1988 .THAT MOTOR RUNS 3/8 FUEL LINE U CAN...

THAT BOAT WAS NOT MADE FOR TWINS. A SINGLE STRENDRIVE. OR ONE OUTBOARD IT ONLY HAS A 7 FOOT 10 INCH BEAM. NOT SAYING SOME ONE COULD NOT DO IT. TWIN BRACKETS COST A LOT OF MONEY TO TRY TESTING. THAT BOAT IS RATED FOR 280 HP SO TWO 135 R NOT TO MUCH HP BUT MY BE TO MANY POUNDS.

YES THAT IS THE SPEC PER GRADY. I JUST REPOWERD A 28 GRADY AT OR GRADY DEALERSHIP IN SOUTH FL WITH F250 .IT HAD 2 STROKE 250 ON IT AT 28 1/2 . HAD 2 PATCH OLD HOLES DRILL NEW HOLES AND NEW TIE BAR .THE SPEC IS THE SAME FOR F225. 32 1/2 INCHS AND NUMBER 2 BOLT HOLE. MAKE SURE U HAVE YAMAHA SALT...

IF YOUR MOTOR RAN FINE AND DID NOT STALL AT SLOW SPEED YOUR FUEL PUMPS MIGHT NOT BE BAD. BUT R FINE TO CHANGE SO U KNOW THEY R GOOD. U MIGHT HAVE ATRIM LEAK IT MIGHT BE OIL ON WATER WHEN U FLUSH MOTOR.

IF YOU STILL NEED HELP WITH MOTOR I AM A OMC TECH AND YAMAHA AND MERC.

THAT MOTOR RUNS ON 4 CLY UNTIL U PUT IT IN GEAR THEN RUNS ON ALL 6 . SOUNDS LIKE MOTOR NEEDS TO BE SETUP.(SYNC @ LINK) WILL MAKE MOTOR PURR WHEN SETUP IS DONE.

OK LET ME NO WHERE TO SEND 2.

THE GEAR CASE U GOT IS NOT A 2 PIECE DRIVESHAFT THAT IS WHY IT IS A LITTLE SHORTER. THE OCEAN RUNNERS USED A 2 PIECE . OMC CHANGED TO A 2 PIECE SHAFT SO TO CHANGE A GEAR CASE ALL V/6 CASE ARE THE SAME AND TO MAKE IT FIT MORE MOTORS ALL U HAD TO DO WAS POP SHIFT OUT IN POP IN NEW CASE YOU JUST...

ABOUT 42.00 BUCKS U HAVE TWO ON THAT MOTOR

THAT IS A GOOD WAY TO KEEP ALL BATTS UP ONLY USE BOTH IF ONE BATT GOES LOW THEN START ON BOTH RUN FOR SOME TIME THEN SWITCH BACK TO BATT THAT WAS LOW AND SEE IF MOTOR WILL START IF IT WILL START THEN JUST RUN ON THAT BATT TO CHARGE SOME MORE. U SHOULD NEVER SWITCH BATT SWITCH WITH MOTOR...

I HAVE INSTALLED A LOT OF AP PUMPS WITH POWER ASSIST STEERING ON GRADYS.BUT IT IS BETTER IF INSTALLED BUY SOMEONE WITH POWER PURGE SYSTEM FOR BLEEDING . I HAVE ALL THE DATA AND DRAWINGS FROM TELEFLEX. THAT U NEED.FOR INSTALL.

ON THAT MOTOR HAS A 3 PHASE CHARGING SYSTEM IT CAN HAVE AUX CHARGE LEAD IT CAN BE HOOKED UP RIGHT TO BATTERY AND NOT AT BATTERY SWITCH . AND IF REGULITOR HAS A PROBLEM IN THE TIRO INSIDE THE REGUITOR IT CAN DISCHARGE BATTERY AFTER SITTING.

OK JUST LET ME NO .

no that is a downfall to yamaha daul waterpickup gearcase. unlike the black motor has us beat on high tilt out of water.

those motors like too sneeze on cold startup most of the time it it is center fuel pump that goes change all three pumps. u can test them by losening them up a little with a 10mm socket and wreanch pull pump away from block a little pump primer blub see if gas comes out pluse hole in back of...

well nuts send me your address and I will send u some and the screws. tell me how many u need we have them at r dealership