Giving a Bezoat a Second Chance

[ZUL8TR]

Is there any aluminum on the cylinder wall, might be hard to see? If so remove it (not with sand paper) before a deglaze. If cylinder still round that would be amazing considering age and use! If out of round a spring hone not good for that could make bore egg worse. For deglaze I use ball hones for the Mercs (haven't done my Y80 yet), they do zip on the metal removal if not excessive, just get the rpm and stroke right and do CW 1st then CCW to finish and lots of outboard oil. That piston is not that bad the ring lands not folded and look ok per pic. I have reused pistons with light score like that with a light clean up using 1000 or 1200 wet paper in circumference direction. Based on your stated goal for the engine might consider a reuse of that piston since already fits the bore with lots of hot cold cycles, a used one could be a worse fit or not any better? Just get the right rings and end gap on them.

[Albert]

Bill,
I’ve had a night to sleep on it and you know what? This is as good as it could have of gone. I wasn’t able to get out to test a final time last fall. We knew it got hot and I ran it one more heat. Thankfully only one more. The cylinder is fine, new rings and a good used piston and this will be back together with a hone.
I am going to have the cylinders measured to be sure they are still round…but I think it will be ok.

Obviously I’d rather not have to deal with this. When you build a motor from spare parts and leftovers you have to expect things won’t be perfect. This motor needs to be good enough to lend to a local racer later this summer for a weekend. Maybe not win but be reliable. That’s the goal.

[bill hoctor]

[Albert]

Sigh,

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[Albert]

Ok,
Time to come clean. When I put this motor together last year we all knew it wasn’t perfect. I ran all last year with stock sized rings on .015 over pistons. Truth be told every time the motor was out my ring gap that started at 0.08 was growing and growing. Compression was dropping and so was power. There were also some things I’ve learned since that I just plain did wrong. Time to give the basket case 80 some love for getting me through the summer. It will be better and good practice before I tear into my hopefully nicer “new” motor.

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[ZUL8TR]

B4 you rering I would clean out the fog oil with a gas and oil mix wash out in the cylinders. Rope over like a number of times to remove excess gas oil, then do a compression check to see what base you are at. A good Y80 will pull at least 90 at 1st pull and at least 150 in 4 pulls, I do cold to keep temp consistent and compare relative measurements. I always  ground the ignition with wire clips across the electric safety plug, just a habit since I do to the 25ss CD system.

[ZUL8TR]

B4 you rering how about cleaning out the fog oil with a gas and oil mix wash out in the cylinders. Rope over a number of times to remove excess gas oil, then do a compression check to see what base you are at. A good Y80 will pull at least 90 at 1st pull and at least 150 in 4 pulls, I do cold to keep temp consistent and compare relative measurements. I always  ground the ignition with wire clips across the electric safety plug, just a habit since I do to the 25ss CD system.

[DeanFHobart]

Just going to re-ring the motor and have a look and make sure everything is ok. This motor was never really raced from what we can tell, it was a back-up for a lake run boat for the last 20 years. Also yes going to switch to the 9/16 prop shaft. It was heavily fogged based on what we saw with the other motor that came with it and a look down the plug holes.

As for the leak in the boat we're unsure if it's leaking from around the air trap of the transom. The boat will come down off of the storage racks in the next couple weeks and we're going to try and find the leak and make sure the bottom has remained perfectly flat.

Lots to do.

When you take it off the rack it will obviously be dry…. So with the boat right side up, pour some water in it and watch where it drips. Simple…. It works every time.

[Albert]

What parts are you getting for the new stock Y80? Among the parts will you be doing the prop shaft from metric to 9/16"?
Where is the seam leak you note in 12/9/21 post on boat or engine?

Just going to re-ring the motor and have a look and make sure everything is ok. This motor was never really raced from what we can tell, it was a back-up for a lake run boat for the last 20 years. Also yes going to switch to the 9/16 prop shaft. It was heavily fogged based on what we saw with the other motor that came with it and a look down the plug holes.

As for the leak in the boat we're unsure if it's leaking from around the air trap of the transom. The boat will come down off of the storage racks in the next couple weeks and we're going to try and find the leak and make sure the bottom has remained perfectly flat.

Lots to do.

[ZUL8TR]

What parts are you getting for the new stock Y80? Among the parts will you be doing the prop shaft from metric to 9/16"?
Where is the seam leak you note in 12/9/21 post on boat or engine?

[ZUL8TR]

What parts are you getting for the new stock Y80? Among the parts will you be doing the prop shaft from metric to 9/16"?
Where is the seam leak you note in 12/9/21 post, boat or engine?

[ZUL8TR]

What parts are you ordering for that stock #2 Y80 you got?

[Albert]

Well the snow is melting and the order has been placed for some y80 parts.
Time to get to work if I want to try the new motor out in late May.

[Albert]

Quick update for anyone looking for one.
The fall got busy in a hurry with us welcoming a new daughter to my house and my work being very very busy. Time has flown and the Bezoat is tucked away for winter. There is some work due in the spring. A small leak at one of the seams, and a new motor plate in the back with captive slots for the motor mount bolts.
While my basket case motor worked fairly well this year I did pick up another Y80. It's bone stock and had been hoarded away for many many years by a local who kept it for a back up for his lake runner. It's stock down to the prop shaft and early style carb. I will give this motor a once over and re-ring the other motor before spring to hopefully have a good runner and a back up/loaner to help get another local on the water.
I am still on the hunt for some cut sleeves or a cut shirt as I hope to make it to Maine in the spring and put some names to faces.
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[DeanFHobart]

Albert,

Perfect….I have always liked NAPA. Back in the day they had magneto parts for KG4’s and 20H’s…. I bought dozens.

You have a really nice outfit there… Congratulations on the outcome….. Probably one of the best restorations I have seen.

Dean……………………………