Volvo AQ130 ring gear

[PiratePast40]

The motor is out of the boat and I finally got it started yesterday. Runs smooth as silk on the engine stand with no rattles, odd sounds, or vibration. I noticed that the ring gear is separating from the flywheel on one side. Called a local machine shop and they say that just pounding it back on won't do much good - it would just start to come off again. They say I should replace it.

I looked at some schematics and discovered that all the 130's use part number 1326333 and also have 419633 in parantheses. The flywheel is 11 1/2inches diameter - 12" with the ring gear. NAPA can't seem to cross reference the number. Any suggestions?

Here's a picture of the gap between the ring gear and flywheel:

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Thanks for any help on where I can find a new ring gear or flywheel / ring gear combination at a decent price.

Here's a picture of my fancy electrical work on building a "starter box:

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The large clip goes to the positive side of the battery, the smaller clip goes to the starter selonoid, and the spade fitting goes to the coil. The rocker switch is for main power and the push switch is to the starter selonoid. Just hook up a battery to the main lug of the starter and negative to the block and it works like a charm. I got lucky - the coil had a built in resister.

 

[PiratePast40]

Re: Volvo AQ130 ring gear

Just found the replacement part number (6842185) on marinepartsexpress.com and they want $661.50 for that danged thing !!!!!

Do you think I might be able to find one that isn't made of gold?

Any ideas?

 

[PiratePast40]

Re: Volvo AQ130 ring gear

I'm trying to narrow this down and found a few things. The B20 automotive motor was used from 68 thru 76 in the 120,140.C202 & 240 models. As far as I know, the flywheel should be the same for the marine engine. I found an automotive part number of W0133-1601240 on Frugalmechanic.com and a price of $50.95.

Anyone else have any better ideas? From the other threads, I haven't seen the flywheel/ring gear discussion for this motor but they indicate that for other engines, the price should be quite a bit lower.

Any second opinions as to replacing the ring gear or just pressing the existing one back in place?

Thanks in advance for any help.

 

[captmello]

Re: Volvo AQ130 ring gear

yea, thats a tough one. I agree the automotive version would be the cheap way to go if you can confirm its the same. I don't know. You said you got a price quote. Can you get the dimensions? There couldn't have been that many different flywheels for that engine.

I'm not a machinist but you may want a second opinion on repairing the one you've got.

EDIT: You have a PM
Don S


Good luck!

 

[PiratePast40]

Re: Volvo AQ130 ring gear

Thanks Don,
Yes - I did get several opinions. The place where I normally take my car said that there must be a reason that the old ring gear has an uneven gap. He was leery of reusing the old one. I'd rather be safe than sorry.

After taking off the flywheel, noticed that ther appeared to be corrosion on both the flywheel and ring gear at the same places. A story of a leaking driveshaft boot is starting to come to mind. When I bought the boat (my first) the guy told me that he bought it from a guy who said it just needed a new boot. When I took the bellhousing to a dealer to see if it was still useable (it had a rough edge on the back of it, he scratched his head for a few seconds and said it was a little shorter than it was supposed to be. Well, we finally determined that the carrier bearing had probably frozen up and when they tried to start the motor, it shattered the bellhousing. The corrosion on both pieces as well as everything else I've seen seems to verify our assumptions. I'll have the shop balance the flywheel/ring gear assembly after the put the new gear on it.

I also noticed oil on the nose of the starter. The motor only ran for about 3 minutes but I think that's telling me that the rear main seal is leaking - maybe dried out. In any case, I don't want to be pulling this motor in and out of the boat so I'm replacing the seal also. NAPA will have the parts tomorrow so that will be one less thing to worry about.

Did I mention that I really wasn't looking for a project but that $500 for a boat was too good to pass up? Oh yea - it needs a new boot !

 

[PiratePast40]

Re: Volvo AQ130 ring gear

Discovered a new problem with the rear main seal. I was having a heck of a time getting the washer and snap ring to seat in the housing with the new felt seal installed. The kit had both the felt ring and the newer style neoprene seal. The problem is that the neoprene seal won't fit the stock housing so you're stuck with the older felt style.

I found a conversion kit with the housing, gasket, and newer type seal for just a little more than the original seal kit itself. Here's the link to one I found if anyone is interested:

Wish I would have known before I started the cussing, pounding, and aggravation of working with the old style seal. If I can't get the retainer and snap ring to seat today, I'll just wait and order the newer style.

It's got me thinking about this motor. It's old technology but simple and easy to work on. People have said over and over that it's very reliable so that's a plus. I'm just wondering about the performance of this 120 hp motor on an 18 foot runabout. The boat from the manufacturer is 1075 lbs. With motor should be around 1450 lbs. It's primary purpose will be fishing and cruising in the reservoirs, lakes, and rivers in the Oregon northwest. I don't have a clue about what to expect performance wise. Anyone have any ideas?