Flywheel or Gear replacement? (update)

[gman90706]

I think I've got some bad/broken flywheel teeth, the starter is starting to slip & not engage occasionally...don't want to get stuck on the water. Starter is fairly new, replaced last year. I can only think we burned off some flywheel teeth after getting stuck on the water going through 2 batteries trying to get it started a couple weeks ago (turned out to be a bad ignition coil).

I'm pulling the engine anyway to do some bilge work so figured I'd fix it while it's out...

My question is, does anybody know if a standard GM flywheel will work? Or has anybody just replaced the ring gear on theirs?

(Mine's a 2000 Volvo Penta 5.0gi - 305 V-8)

I show Volvo Part# 3853958 for the flywheel, and 3855970 for the gear ring...
http://www.volvopentastore.com/CRAN...4251197--**********.247051306--view_id.312631

Quick search for similar GM engine at my local autoparts store I can get the whole flywheel w/gear for like $90. Will it work? Is there anything special about this part I'm missing? Anybody done this, or is there any reason why I need to get the Volvo parts? Many thanks for any insight in this matter........

Tim

 

[dan t.]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

the ring gear should be a stock item ,check with napa ,they are shrunk on, just drive the old one off with a punch,hold the new one with some vicegrips,heat it up,drop it on,yer done

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

the ring gear should be a stock item ,check with napa ,they are shrunk on, just drive the old one off with a punch,hold the new one with some vicegrips,heat it up,drop it on,yer done

Thanks Dan, kinda what I was thinkin' ... will be pulling the motor tomorrow ... I know my flywheel is rusted up to hell from last time lookin' at 'er when replacing the starter (bad bilge pump let a ton of seawater in the bilge a while ago) ... but @ ~$90 for an entire flywheel vs. ~$30? for the ring gear, thinkin' maybe just replace the whole thing, as long as the flywheel ain't drilled anything special for the coupler or anything?

 

[Bondo]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Ayuh,....

I'd just replace the Ring Gear,... No reason to switch the actual flywheel....

They come in 2 sizes,... 12",+ 14"...

Btw,...I use my kitchen Oven to heat the new 1,+ then just drop it on....

 

[chiefalen]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Maybe it's not the flywheel but the teeth on the starter.

Those can be changed also.

Or the bendix on the starter more likely.

 

[captmello]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

going through 2 batteries trying to get it started

I'd pull the starter and have it checked. Sounds like your pulling the motor anyway though.

Let us know the outcome!!

 

[TilliamWe]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

While the engine is out, do me a favor and check to make sure you aren't getting water in the exhaust passages of your exhaust manifolds. I would hate to think you have the beginnings of hydrolocking and hurt your engine after you put it back in.

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Update: Engine pulled, had to rig up a custom engine hoist with lumber, my other engine hoist had barely enough reach and nowhere enough height DOH. Built a nice hoist damn near 12' high with 4x4's & 4x6's, got my drawings if anyone needs plans for one

Anyway, turns out starter gears look OK but starter looks horrible way rusted up all over. Gonna clean it up & try to avoid replacing it.

Getting the flywheel cover off was a chore, lot of corrosion & rust... broke two of the lower cover bolts off with minimal torque - sucks. (just the small lower cover plate ones not the main bolts).... Prob. will be OK w/o 'em but gonna try to extract 'em and fix it.

Flywheel is missing ONE tooth ... all others look fine. Amazing how one tooth gone could cause the frequent starter slipping. Gonna inspect the starter more closely to make sure.

Will see if I can get a new ring gear tomorrow, if not guess it's Monday...

Got a lot of other misc. cleanup to do, rust cleanup, painting, etc.... one thing's for sure, I'm glad I did this one myself...no doubt the $1200+ my boat guy quoted would have covered nowhere near the amount of work I'm doing, not to mention I realized how bad he raped me on the last outdrive service.... (another story) - let's just say it's easy to tell parts "I" put on last I had the drive off a couple years ago are STILL THERE, yet were supposed to be replaced (and were paid for) during the last service at the dealer

Thanks for the tips guys, will keep you posted, these forums rock.

 

[SPOONMAN1]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

I would not be too surprised if you still have starter problems after you reassemble, I just did a ring gear replacement (one broken tooth) still had to have starter rebuilt. (bendix wasn't engaging starter gear properly Hope thats not your case.

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Quick question: local parts shop doesn't have the ring gear in stock, but entire flywheel/gear for $40 (after core charge), sounds like a deal to me, but if I went this route would I need to worry about any balancing issue? Parts store says no, but thought I'd check with y'all.... (14" 168-tooth)...

 

[SPOONMAN1]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

I bought the ring gear only at a local auto parts chain store for $15, I would be suspicious of the whole flywheel for $40. You know your fly wheel is balanced. It isn't a big deal to put the ring on.

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

I bought the ring gear only at a local auto parts chain store for $15, I would be suspicious of the whole flywheel for $40. You know your fly wheel is balanced. It isn't a big deal to put the ring on.

good point. made a few calls found the gear for $17...heading to pick it up.

 

[chiefalen]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

One tooth missing on a flywheel won't make the starter slip.

The starter needs replacing, or rebuilt to marine standards.

Me personally i would get a new starter.

Just not worth the work to pull the motor on some of these beasts to get to the starter.

Good luck.

 

[chiefalen]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Hows the coupler look if you had that mush rust on the flywheel cover?

And the oil pan?

Pay attention to the lip of the oil pan.

When i pull a motor i go over that pan with a magnifying glass.

One little pinhole is all it takes.

Than clean the pan real good and paint the hell outta it.

3-4 coats i put on mine.

Timing cover lower lip?

Hows that look?

 

[Gary H NC]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Chiefalen has good points for sure.
Look the oil pan and timing cover...clean and paint..
That lower lip on the timing cover loves to rust out and sling oil.

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Hows the coupler look if you had that mush rust on the flywheel cover? And the oil pan? Timing cover lower lip?Hows that look?.............

Coupler looks fine. Oil pan - plenty of rust/corrosion around the bolts & retaining bar (or whatever it's called) around the lip... Anyway, pics are better than words ...., notice how nice of my boat mechanic to not even paint the starter when he replaced it last

Starter & Flywheel - the more I look at it the more I think I'm just gonna have to bite it and replace the starter now:

Oil Pan? Doesn't look the greatest, but no leaks or anything....

Bunch of other pics of the work in progress here... http://s530.photobucket.com/albums/dd341/gman90706/Boat%20Repairs/

No oil leaks, but looking close at the oil pan now, thinnking might as well pull it and clean everything up, replace gasket, etc... although I've been told that if it isn't leaking leave it alone?....

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Comment.
That is a LOT of water damage to the starter if you had it replaced only a short time ago. It appears there is even rust on the bendix shaft (where the gear slides) which tells me you have a current issue with water intrusion.

Yeah... that's what I'm working to fix on the side. My bait tank loves to overflow and half the water that don't make it out the side drains ends up draining into the engine compartment ... not to mention the bilge pump, although currently technically located at the "lowest" point in the boat, is definitely not the lowest point when underway (5+ gallons splashing around b4 the pump even kicks in). Also, I installed a raw water washdown last season that everybody loves to use but I think I created a monster because a lot of that washdown is ending up in the engine compartment....

I'm going to add a 2nd bilge pump further aft, seal the engine compartment cover better, and work on sealing the bait tank so it quits overflowing to the deck.... this has really become an expensive learning lesson so far

 

[gman90706]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

Update: ... well, starter is being rebuilt through a local shop that does only starters & alternators ... along with my old one I had lyin' around (I figure 2 rebuilds for the price of one new so I have a backup). I emphasized heavily that it is marine, please make sure they're rebuilt marine!, and the head tech said kept nodding yes, yes, no problem, 'they do 'em all the time'. Just didn't get any warm & fuzzies though... should I be worried?

Next stop, manifolds & riser inspection - initial draining didn't look good. Time for another thread

 

[Bondo]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

I emphasized heavily that it is marine, please make sure they're rebuilt marine!, and the head tech said kept nodding yes, yes, no problem, 'they do 'em all the time'. Just didn't get any warm & fuzzies though...

Ayuh,....

I can't say that I've ever gotten "any warm & fuzzies" from buying Parts before,....
Well,....
Maybe when I bought a complete Bravo outdrive,+ transom assembley for less than 1/4 of it's Value....
But,...
I blame that Feeling on Not spending the Other couple of Grand...

I don't think you need to be Worried,...
Rebuilding a starter to Marine Specs is pretty much the same as rebuilding Any starter,...
Just a couple of extra pieces....

 

[chiefalen]

Re: Flywheel or Gear replacement?

Re: Flywheel or Gear replacement?

I don't know about that oil pan.

Looks to be ready to sprout pinhole leaks.

Every dollar counts now a days, but if that was my pan i would be pricing a new one.

And the screws on the lip, the lip itself, i don't want to really say it.

That pan should be replaced.

I am truly sorry.

Did i miss the pics of the lower lip of the timing cover?