Cylinder Ridge Hone or have bored

[lcu1646]

:facepalm: Hello guys first post like everyone who post I have a question I just bought a 1977 185 A ranger boat with a Johnson 110 hp motor year 1988. The person I got it from told me he had a problem with the motor and shut it down once he heard a ticking noise I pulled the head and I found that the ring pretty much rolled over itself and to me cause very minor cylinder wall damaged but I am not expert. I have attached pictures to this post to show damage area. I purchased a cylinder bore dial indicator which will come in a few days. My plans are to get the motor running and use it this summer and find a place this coming winter to really do a restore on the boat which I plan on posting later. I have seen many video on deglassing a cylinder wall and one on using a ridged hone I am sure that is what I need but I wanted to make sure, I know you would like measurement but I don't have them right now I thought of snap gages but I rather knock it out with the cylinder bore gage. Now I am a person who rather buy a tool learn how to use it and have it then to take the head to a machine shop to repair, color me crazy but that is just how I am! I like to learn one of the reason I bought the boat and motor. I enjoy researching reading and asking question my wife tells me its part of my ADD I think its just me having to have a project to work on! Anyway please take a look at the pictures and let me know want you think there isn't any really deep groves or gouges. Do you guys think ridged hone would do the trick or should I just take it in to the shop and have the cylinder bored out? the other 3 cylinder I have 130 psi on compression test so I am only worried out changing out this cylinder. Also the head has some good size dings I don't think they will bother anything what do you guys think?

Thank for the help

 

[kodibass]

Re: Cylinder Ridge Hone or have bored

I'V had a few old clunkers come my way that looked about as yours does, I used flex hones first medium then fine, replaced piston & rings most often from a donor motor, glue it back together & they most often surprise me at how well they will run. Run it a bit on the rich side until you do the complete tear down & full monty. Heck I would even use the old head gasket if it came off clean, go a bit heavy on the gasket sealer.. life's short take risk. "-)

 

[gm280]

Re: Cylinder Ridge Hone or have bored

With what I've seen it does look like a deglazing hone may work. After you get your cylinder sized using your newest tool, then you can determine if you want to bore or not. I am doing an old 1976 Johnson 40 HP myself and how I determined to just deglaze and rering was I took the old ring(s) and checked the ring end gap and compared those readings to the specific year, model, HP shop manual’s ring end-gap specs. The end gaps were reading .025 reading. Then I ordered a ring set and remeasured the ring end gap and now they read around .015 end gap. So since the spec calls for .007 to .017, I'm good and will not bore... You could do that yourself and see what the end gap is too. Just a suggestion and my opinion for what it’s worth... As far as the head dings, I’d feather those nicks and smooth them out and run it myself. They don’t seem that bad or deep to me...

 

[daselbee]

Re: Cylinder Ridge Hone or have bored

Now you see, Kodibass and I think exactly alike. These motors will run and run and run even if they are not perfectly, "by the book", repaired. I have honed the cyl, thrown in new rings, used piston, used head, and the owners are still using their engines.
I have advised others on this board with "broken ring crossflows" that they could do the repair this way, and they are still running (as far as I know). WATCH your rod cap alignment!!!!

Just keep it clean on re-assembly, check compression immediately after rebuild, before first start, and monitor regularly.

It ain't gonna be perfect, but it will be very economical and it'll run.

 

[lcu1646]

Re: Cylinder Ridge Hone or have bored

Thanks guys seems like sound advise! I am going to pull the motor off the boat today I pick-up a engine hoist/cherry picker assembled it last night. I will post some pictures of the cylinder after I de-glaze it with a flex hone or nickname ding al berry style an go from there I’ll get a medium and a fine. I should be able to remove the carbs and head undo the bad cylinder arm and slide it up and out the cylinder and then assemble new piston and install the new piston and rings with out having to pull the fly wheel?