Yamaha OX66 225s- Tell me everything

[SkunkBoat]

Originally Posted by spareparts

its not supposed to run without a battery

I don't want to seem like I am doubting you, just asking for a little more info...

We figured since it has an emergency pull start rope, that it should run without a battery...so we tried it and it shut off...
Then we turned off the battery to the running Stbd engine and it kept running...

after that we read the warning on the switches "Don't shut off while engines running"

did I mention I don't have battery switches on the V20 and was just winging it. Had been running them on BOTH which caused the uncharged battery to drain the charged ones when I left the switch on Both overnight....new boats!!!

I think the PO had some inkling as to a charging problem because all 3 batteries were brand new and he had both Stbd and Port Aux charging wires to the port battery.

[SkunkBoat]

So new stator and regulator gives us 14.5 volts DC unloaded, which is nice.

[randlemanboater]

Did that fix your uneven power problem?

[SkunkBoat]

Originally Posted by randlemanboater

Did that fix your uneven power problem?

no, actually the charging problem was on the port motor that gets above 5000.

We did loosen up the controls...snapped off 2 of the 4 allen screws holding the binnacle cover. Lubed the linkage at the motors. Smoother and easier to push and shift.

Suppose we could run with cover off and try to work throttle from there, if we get to 5k then linkage needs adjusting?

Bought a Seloc manual on eBay $25...great if work on every motor from 2 hp to 250 and you already know what you are doing. Should have bought a Yamaha manual for SX225/LX225...$90 from Yamaha.

I think the prop is definitely a contributing factor, I can see a difference..

Funny thing, if I read fuel meters separately, the stbd motor actually burns a hair less fuel when they are both running at 4200

[spareparts]

if you can "see" a difference in props, then there is definitely an issue. I had props that look perfect were way off. What props are on the boat?

[SkunkBoat]

Originally Posted by spareparts

if you can "see" a difference in props, then there is definitely an issue. I had props that look perfect were way off. What props are on the boat?

haven't had the chance to get a good hands-on look at the props. Guess thats my next project...after fishing tomorrow morning...

Assuming they are marked the same size....PO said he had the stbd one repaired.

Edges look different, not cupped like the port one.
I'll get the size off both and maybe get another to match the port side...throw money at it...see what sticks....

By the way, we found some poor connections and green copper on some cables from the house battery and now that side is also measuring 14V when we are running. So we are making progress. Installed 4 more new rod holders also...

[THEFERMANATOR]

When having a prop rebuilt, I always reccomend doing them in pairs. Many shops use universal dies to shape the blades which can be good or bad. Many times a certain size of prop can comein 20 different blade types, or more. You really need to have a prop rebuilt on a die made for just that specific prop, but that can mean a prop shop must buy 20 different dies in every pitch size. This can add up to thousands of dies, so they use universal dies to use to rebuild, shape, and contour the blade. It only takes the slightest of differences in prop design to completely change how a prop works or even how the boat rides. Having both props done at the same time means they can at least make them both similiar. You may even benefit from a prop swap. For a big boat like that with big v-6 2 strokes, it would do well with a set of mirage plus large diameter props. It would help out with prop hookup down low, and they lift the stern pretty well to help plant the bow down which helps in thechop to keep the sharp part of the v bow doing it's job instead of running bow high and slamming the flatter hull bottom.