Jethro should be paying attention because that right there is detonation. I didn't read hardly any of this post but pay attention to possible other internal damage from that piston!
Jethro should be paying attention because that right there is detonation. I didn't read hardly any of this post but pay attention to possible other internal damage from that piston!
If that was me attempting to do any of this, I would already have a bunch of extra parts.....
Good luck and hope it's not too painful.....
2013 Ranger Z520c, 2013 Yamaha 250 SHO
2018 Ranger Z521c, 2018 Yamaha 250 SHO
Good time to change the upper mounts. That's the piston looking things. Especially the way they look!! What them funny things on your hands? Weird color. Drop the lower unit, makes putting the powerhead on easier. Pay attention to your locating pins and where they go, they can magically disappear!! CJ
2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec.
Jethro would agree with you. On all counts. Detonation and check for other damage that might not be readily apparent.Originally Posted by Rich Z
Good stuff man, way to get after it! I always want to take pics of jobs like that but then I forget cause Im just moving along. Looking forward to the rest!
2005 BassCat Pantera / 200 EFI 2.5L
Bullet 21XD / 250 XB (Gone to a great home in LA)
"There is no such thing as a bad day fishing!"
Definitely going to follow this thread closely.....great to see that you jumped in with both feet.
Git r done!!!. Be careful with that crowbar, the bottom surface of the powerhead is aluminum and must seal to the mid leg area, so you can't booger it up. Be careful with all of the aluminum surfaces, particularly the mating surfaces of the block halves when you get around to breaking the block apart. No crowbar! You can use a dead blow hammer or piece of soft wood or something like that to gently tap it, if needed. Time to remove all the goodies on the PH. When you get the flywheel off take good pics of wire routing and bundling, that wire will get into the flywheel later if you don't secure it in the same fashion upon reassembly.
The block will have to go to a machinist obviously, so putting the bolts, nuts, fasteners back on the block isn't a good idea. Bag and tag em. The machinist will want a completely stripped block to work with, and if he pulls any "extras" off of it you will get them back in a handful with no idea where they came from. Just sayin.....way to jump in there.
reminds me of pulling power head on my hpdi. all coming back to me quickly.
not that bad in the end every thing has to go back somewhere. I never had a manual
just hoped for the best.
Multi-quote seems to not work on this forum (bummer!) but thanks for the help everyone!
CJ1, I didn't see any pins on my engine. I just saw the two threaded studs the nuts go on when I put it back together. I'll look into changing those upper mounts though. I need to find a part number and see how expensive they are. The orange things are gloves so I can work as long as possible, toss the gloves, and still get cleaned up "wife acceptable" in time for dinner :D
Charlie, I'll remember the bolt thing and strip everything off before I drop it off to be machined. But...What am I having machined exactly? The hole the piston is in? Can I just run a honer in it or should I pay to have it done? ($$$$)
Everyone else, I'd reply individually but the forum is broken for me. Glad to have so many eyes watching me since I have no idea what I'm doing!
You won't know exactly what machining is needed until you get that piston out, but I don't think a hone is gonna cut it. It's highly likely that hole will be damaged to the point of needing to be bored for an oversized piston. The other 5 holes will need to be honed. Where I live, that's around $125. total, but I guess that can be different around the country.
How about a good close up photo of the damaged piston and cylinder walls?
SkeeterStew, you got a pair man. Ain't no way I would tackle that job unless I had somebody looking over my shoulder that had done it many times. I would like to be your next door neighbor so I could help and learn. Good luck with outcome. It'll be like new when you get done.
Ha, so far he has done the easy part. After a melt down like that don't be surprised to see other internal damage.
There are little locating pins that are into the block and what bolts on to the mating section. They are for alignment and have a nasty habit of vanishing! They could be in the block or mating piece. Like has been asked a pic of the piston bore after a hone has been run through it will tell a huge story on condition of the bore but after one fails that bad the outcome is usually not good like Rich stated. CJ
2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec.
Hey Charlie! I got a surprise look at the cylinder walls today. Pics coming. The surprise is they don't seem scored or scratched at all. Just the piston is destroyed and the head is covered in those little aluminum birdseeds that I'll have to pick out and try to smooth down. I'm hoping I don't need a new head.
Edit: Got a look behind the piston. See below.
Last edited by SkeeterStew; 06-09-2016 at 07:55 PM.
I sure hope so Heethen (that's what I call my kids when they're being crazy. Great name!). This is a heck of an undertaking. I figure I can't mess it up any more, right? May as well give it a shot and try to save some money. It's that or sell the boat and I sure don't wanna do that!
But if you get down this way, stop on by! I'll feed ya and you can turn some wrenches :D
Last edited by SkeeterStew; 06-09-2016 at 05:42 PM.
You jinxed me on that one buddy! I got a fantastic closeup coming up today. Stay tuned!
Fortune favors the bold! -Edna Mode
I sure wish Multi-Quote worked on here! Sorry for
all the replies in a row. Anyway, Cj1 you may be right. I'll check the mating piece in a bit and see if they all stayed put. With my luck they all chased that circlip down the exhaust hole
Ok guys, here's a question for today. On the flywheel, is that top nut all that's holding it on? I'm having a heck of a time getting it off. Tighten puller, tap with hammer, tighten puller, tap, pb blaster, tap some more, doesn't seem to be moving at all. :(
The nut and friction between the flywheel and the crank shaft is all that is holding it on. It can be a sumbitch. Leave the nut loosely in place so that when the flywheel comes loose it does not go flying into outer space. Maybe apply a bit of heat to the flywheel and a bit of dry ice to the top of the crank shaft.I sure wish Multi-Quote worked on here! Sorry for
all the replies in a row. Anyway, Cj1 you may be right. I'll check the mating piece in a bit and see if they all stayed put. With my luck they all chased that circlip down the exhaust hole
Ok guys, here's a question for today. On the flywheel, is that top nut all that's holding it on? I'm having a heck of a time getting it off. Tighten puller, tap with hammer, tighten puller, tap, pb blaster, tap some more, doesn't seem to be moving at all. :(
Regarding the dowel locating pins they sometimes get stuck in the hole in the bottom of the block. Or if the power head was removed once before they might not have been reused. Or, maybe one went down the exhaust.
I have had some luck getting aluminum off the cylinder walls by applying hydrochloric acid with a swab. It will dissolve the aluminum while not harming the steel liner.
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