2007 Yamaha HPDI 225 series 2 vmax gear lock issue

[gordon24_1]

I drive boats, I am no mechanic!

Shifter is in neutral, turn key, engine start and even though the shifter is in neautral, the prop is turning at a pretty good clip. enough so that it would push the boat forward, although as stated, shifter in neutral.

So, putting it in drive it's nice a smooth, assuming due to speed of prop turning gears to match the rpm, but going into reverse, griiiinnnddd! and it goes in, but thought it was high rpm till I seen the prop turning in neutral.

Today, everything was fine all day, then backing off the bank to put it on the truck, I could not get it into reverse, it felt like there is something blocking the cable or it's twisted, have not taken the cowel off yet, will tomorrow, but thought I better ask some advice before screwing up my motor, would rather put in shop if need be for a week or so then forever!!

Also have a hot-foot if that matters.

Thank you in advance!!

 

[cousinabe]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Sounds like your cables are out of whack.
Take the cowling off to see what's going on.
The engine will start regardless as long as the neutral safety switch is engaged in the control box.

 

[rodbolt]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

its actually normal for the prop to spin some in nuetral,especially if its out of the water.
however wrong gearcase oil or contaminated oil makes the issue worse.
most likly the linkage adjustment is ok or your shift cut and shift position switches would be setting codes and possibly making it run quite nasty.
the grind and loss of reverse is typical of a fastener that got loose and is now lodged at the front edge of the block getting jammed between the block,lower cowl and the shift linkage at the front center of the block.
carefully inspect that area.
its also why we learned to use the reccomended gear oil and not the HD thats for the V8 gearcase nor the merc HP lube.
the pinion,fwd and rev gears always turn any time the crankshaft is turning.
wrong viscosity oil allows the surface attraction of the oil to spin the prop shaft.
hot foot has nothing to do with the shifting as long as the engine idle speed remains in the 650 RPM range.

 

[gordon24_1]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Wonderful advice.

I will pull the cowling and do the inspections and let you know what I find.

If I dont see anything special, then just going to put it in the shop. I just got the unit and it had the maintenance done right before I received the boat, so it's very possible they did not put something in right place or whatever.

anyway, thank you for the information about the prop spin and such, very informative. I need to know more just in case.

 

[gordon24_1]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

ok, looking inside, this bolt and piece of plastic were laying next to the link that goes down into the lower unit from the top.

It's a hex style bolt, but do not see where it came from, but needless to say that did not resolve it.

while having another person put in gear, forward, it was still stuck, but I turn the prop just about a 1/2 inch and it goes, but then reverse was tight, but would go, but if I spun the prop, put in forward, it went fine, but then would not go into reverse at all till I spun the prop or moved it a bit, almost like the lower unit is not in line with the linkage??

Now that being said, is it possible for a washer or anything to fall between the upper linkage and the lower unit, down the shaft that goes into the lower unit?

 

[gordon24_1]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Ok, I take that back.

After pulling my arse out of my head and reading more, discovered NOT to put in gear with motor off or prop not spinning.

So, I submerged the motor and started it. I shifted from reverse to neu to forward etc, with no bind or strain, very clean.

Now that being said, it is idling at 1000 to 1200 which is waaaaay off, so going to read on how to adjust the throttle down.

Thanks for everything!!

 

[99yam40]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

I would not start turning any screws, this motor needs to be looked at by someone with the proper tools and equipment to see what is going on.
Did you allow it to warm up properly for the RPM to drop?

 

[cousinabe]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Agree with 99yam40, do not turn any screws.
your rpms could be not dropping due to many things including a tstat, sensors.
If your not that familiar with the Z motors, I would hire a pro to get it resolved.
In the meantime, get a service manual and read up the Z motors in the forum.
They run the ragged edge of lean and can pop a piston very easily if not properly maintained and serviced.

 

[gordon24_1]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Ok, I didn't change anything.

With the idle up, is it going to damage anything in the lower unit when going into reverse with the upper end idle?

 

[cousinabe]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

shouldn't damage anything. It will make a loud grind noise though. Not something you want to run with long term.

i would be guessing that your thermostat is stuck open, not letting the engine get up to proper operating temp. the temp sensor never gets hot enough causing the engine to stay in warm up mode at 1100-1200 rpms. just a guess though. get it checked out.
what is the maint history been?

 

[99yam40]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

Like Rodbolt usually says, if it is sick make it well, take it to the Dr before it gets worse or dies.

You need to find out where those loose parts came from also

 

[gordon24_1]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

10-4 on both of your replies, will get it done, I am curious where it came from as well!!

It has been maintained yearly, I have the paperwork, will look and see if they did anything out of the ordinary. I got the boat from a guy who is sponsored by skeeter down in near Killeen texas and his buddy owns a marine shop and everything else has been fine.

Thanks to all!!

 

[rodbolt]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

dang I am good
but I agree, DO NOT trwist any screws.
that motor has no idle adjustments.
it either idles correctly or its broke.
carefrully inspect the shift and throttle cable holder.
that plastic piece almost looks like the clip that locks them in place.
it could also be a clip that holds down the trim leads or the fuel and oil lines.
DO NOT shift gears above 700 RPM, it can and will lead to gearcase damage.

 

[cousinabe]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

dang I am good

agree. no doubt experience comes with time!

 

[rodbolt]

Re: 2007 Yamaha HPDI 225 series 2 vmax gear lock issue

experience come by making mistakes.
all you can hope for is the education is cheap.