Yamaha ox66 question
 

This morning I hooked up the muffs and started the motor.It started perfectly but I have no real volume of water coming out of the pee hole , it's merely a slow drip. I shut it down within 20 seconds or so, I stuck a wire in the pee hole just to be sure it wasn't clogged ,and it was free. I restarted it again with the same result. What should I be looking at next ? Stats ?? I can't imagine the lower unit pump just died like that but then again what do I know !!

Try starting it in the water, Them motors need a god supply of water to pump[.

Hi Joe, good to see ya! Last year I had an overheat alarm going off , and I was told by one of the guys as you said that they need mucho water , but I changed the thermostats and along with running the garden hose full open I never had that issue again.. I'm running the garden hose full open. I just know the motor well enough to feel as though I'm running her to long without water !!

it should pee right away even when stats are closed.

not running, Does it pee with hose on the flush port?

I'm new to Ox66s. I've only run mine on the muffs last december during shutdown. they peed pretty good on the muffs.

Some motors need to build up enough water to start pumping. Sometimes you can plug a drain hole with your finger and get it to fill up...if that makes sense to you???

When was the last impeller change?

Impeller was done 12 months ago, I just can't believe it would go from perfect to nothing at all, I'm afraid of running it dry for to long !!

Yamaha's don't like running on muffs. Proper way is to run a muff and a y fitting to the flush fitting on the power head. Hook a hose the the flush fitting and see if anything is blocking the pee hole. Put the engine in a barrel or back it in teh water and see how it pumps

I hooked the garden hose to the flush fitting, it did a lot of intermittent spitting out the tell tale then out came a steady stream of water I let it run for about 10 mins. Then hooked up the muffs started her and she ran as she normally would ! Thanks guys!! I spent my lunch time reading up on how the cooling on an outboard works and amongst other things I foun,d out that just because you have water at the pee hole that doesn't mean your engine is cooling well or properly,

Great!

I'm gonna piggyback this thread...Ox66 225hp
Just took my lower units off for impeller change.
Found that "kits" didn't include enough parts.

There is a small metal sleeve and plastic spacer that really needed to be replaced due to years of wiggling off and on with pliers. Ordered them and 1 new Plastic Housing that was past its prime. The other one had been replaced recently.

Took a peek at the upper seals and the garter springs on both motors were broken and providing no tension. Not leaking and no water in oil but I'm gonna replace. They are doubled so I ordered 4. The diagram also shows an o-ring under the holder so I ordered 2.

Anybody hear that cash register dinging...???

Motor Guys. Is replacing them as straight forward as it looks?

Also there are so slightly leaking seals on 2 of the trim rams due to some slight pitting. smoothed it as best I could with 600 grit. Bought seals but didn't have "the tool". Tried half assed ways to remove.... ordered the tool.....ding!

theres a trick to getting that sleave off without screwing up the plastic collar, apply a little heat to soften the plastic and it will come right off.
drive shaft seals aren't too bad, take the bolts outof the carrier, use a blunt punch and rotate the carrier, once its broken loose it should come out, if not, position one of the holes over open space. a 3/8 16 ta p will theard the hole,, position the hole over part of the lower unit housing, run a bolt in to use as puller to lift the carrier. Remove the seal and replace. Note, both seals face the same direction on a Yamaha, unlike a Merc.
Trim seals can be pulled with a seal puller if they are the ones that dont have to have the end caps removed. A piece of pvc pipe cut square can be used to install the seals

Um, I think Maybe I need to order a service manual for the ox66 !!!