Guys what should I do

[Guest]

Alright, guys the below maybe some gruesome pics however I need advise of what to do. Do I fix it, or do I just get another one. So far I know one piston, and having the head redone and the hole in the motor to fix. Is this salvagable or not? It is such a good engine besides what just happened, and I just bought some new things to get it running great before this happened. Here's the pics so far.

 

[smokinbasser]

A good welder can patch the hole fairly easily. Get your estimates for the parts and repair and weigh it against the outlay of another engine. I would imagine repair will get you back on the water cheaper than a new engine. You mention it was a good engine before disaster, it should be again with quality repairs.

 

[SpurHunter]

Whats the story? Brand, size age of motor?

 

[Guest]

smokin thanks for the encouragement. I've got most of the pieces that I know I'll need priced and that so far I'm around 500, and that includes a new head. Do you all think the head can be machined or redone or is a new one in store. The head is 130.00

 

[captXtreme]

Andy what is the fuel mixture ratio that you used, did you have it under a load or free revving when this happened. just wondering.</p>

James</p>

 

[Guest]

i agree with Smokinbasser about the repairs, welding up the block will be the easy part, I suppose a rod came loose and busted the block? Did it destroy the crank? What caused the damage to the head? did you bust a ring and parts of the ring get on top of the piston? The head looks salvageable if you can clean up and smooth out the rough parts. You will probably need a bore job, new pistons, new rings, new rods, maybe just one rod? Also new bearings, add all this up and see what it will cost, you can build it yourself or you can get someone to do it for you. Get a price on a rebuilt short block or a new one, weigh out the advantages and disadvantages.

 

[Guest]

The Subject: 1979 Johnson 55 HP. Talked to the original owner, and the person before me that had it was easy on it.

Spur, the story is that I bouught the engine i'd say 3 weeks ago. Its been running great and I took it wout on the maiden voyage friday. Everything ran well. Didn't have the tach setup yet. Came back in and started working on the tach on tues. Well got the tach hooked to the appropriate wires pulled the starting lever up and it was running fine. Then all of a sudden I hear air and stop the engine and go look. Don't see anything but then see like smoke coming from behind the fuel pump. Well looked behind the fuel pump and there was the hole. There was little pieces of metal on the outside un the lower cowling and I was like great threw a rod. Well after looking at the diag, saw there are no rods. I decided that something had to of gotten caught between the crankshaft and the block, becasue right at that spot the crankshaft gets really close and would make that exact hole. So hence forth I was like not gogin to runin this thing forwever and proceeded to folow the manual and started to disassemble. Now I'm on getting the flywheel off and getting into the block. Apparently the piston has something to do with it and I'm thinking something broke of the piston becasue the back of the piston looks boogered up. I know that the wall of the piston is going to have to be repaired and don't know how to do that. Is there a sleeve or will it have to be honed out? Also on the head does it look to far gone or where someone can work it out? So this is my sotry on what happened. Also if someone could advise if a outside grip puller will bugger up the flywheel, or if someone has a real flywheel puller if they would graciously help me get it pulled.

 

[Guest]

James mixture was 50:1 brand new gas. NO ree revving just started it up ran for 10 seconds maybe. Doc thanks for the up and up. I'm going to do the work, well besides getting everything bored and so forth. Crank looks good so far, but I still have to get this done, and I guess there are rods. can you bore just one piston, or will I have to do both. I think I can put new pistons and rods for under 500. I've found some kits. I'm going to go ahead and replace the impeller and am goign to try and replce anything that looks worn. I'm goign to try and get as many pics as possible if something is questiable. Hopefully I'll get the crank out this weekend.

 

[jbh3]

I had this engine in the blue (Evinrude) version many moons ago. The engine was only a couple of years old when I had a similar failure. My mechanic at the time determined the cause of failure to be related to the "high ring" piston design OMC utilized on this engine. Seems that the ring grooves actually were cut too high on the pistons. Result was a broken ring, which destroyed the related piston. I would have a hard time putting a bunch of money in that engine unless I had a REALLY good OMC mechanic. Of course, buying another used engine would be a roll of the dice as well. Good luck whichever way you go.

 

[Guest]

JBH3 thanks for the info above. That is my thing, is that thsi is my 3rd engine, and all of them i've taken out maybe 6 times out of all of them. The engine is great and ran fine, until this. Even though I'm no OMC mechanic, I figured it would at least teach me something about outboards. I've got all the literature for a complete breakdown and it seems relitively simple, this is in relative terms when reading. This engine was originally someones on this board, and know its not a user error due to I've taken the time to replace anything worn and checking all wiring and other things before running it on the water. I've had it 3 weeks probably and just took it out fri for 20 minutes. And then this happened on tues. I don't want to roll the dice on another engine in the back of my head due to Ive had nothing but problems. I figured if I figure this out and its not to much to fix, then I've cam out smarter in the long run too and maybe can help someone else. And I don't have another hunk of money to put down on a new engine. As long and the crankshaft is fine I should be able to fix the other things. Just to say it the cranksahft new is 897.00

 

[beetlespin]

It sounds like a total rebuild is in order and that might be more than the engine is worth. Go to www.jacosmarine.com and see if they have any decent priced used motors.

 

[captain kirk]

A puller can be made for the flywheel by using a piece of three-eighth inch flat bar,provided there is a ring of bolts
holding a part of the starter mechanism around the crankshaft. Remove this part and determine the distance from the center of the crank to the center of these holes,make a layout on the bar stock to this dimension,also add the
bolt hole spacings to this circle.Drill these hole on the circle using a slightly larger size bit than the bolt holes in the flywheel.Now, place this plate atop the crank and using bolts long enough to reach the flywheel,bolts should be at least a 1/4 inch longer to prevent stripping out, torque down evenly,don't over torque, tap lightly with hammer on center of plate and the flywheel should pop loose. Hope this helps.

 

[Guest]

Thanks captain worked great got the flywheel off, now I've taken everything off the engine and block, how do I get the block and engine out now? Taken loose the engine mounts and I can't get er to budge. In order to look at everything I'll need to pull the engine out correct?

 

[flip1up]

power head bolts come up fronm underneath, take off the plastic collar under the power head. you will have to disconnect the shift rod too.

 

[Guest]

thanks flip1 the plactic collar I'm figuring is the lower part of the cover.

 

[flip1up]

Not sure on that motor. Should be a couple of screws holding a cover on that will expose your powerhead bolts. The cover will be under the tray that your cowl rests on. The shift rod will be hard to see, use a flashlight. It should be at the bottom of your powerhead, probably on the drivers side.

 

[Guest]

Thanks flip found the sift, its under the carb, working and getting the rest apart.

 

[Guest]

Thanks flip found the shift, its under the carb, working on getting the rest apart.