Johnson 130HP Overhaul Complete

[esiquiolazaro1971]

I just completed the overhaul on my 1997 130HP Johnson. Can someone help me out with the breakin procedure. I just spend some good money and I want to make sure I don't do something stupid.

 

[Solittle]

Re: Johnson 130HP Overhaul Complete

The process takes 10 hours though I'm sure many don't or won't take that long. During this period you want to run an at oil to gas ratio of 24 to one - double the usual. Lots of info on this under the red search at the top of the page. Try using "break in" or simular.<br /><br />The key is not to run at a set rpm for a long period of time. I am at the end of the break in period for one of my two. I ran the first hour at 1500 or less. The second up to 2000 varying constantly. Slowly work your way up in speed as you build time. While some folks will give you set rules, a lot depends on the hull you have & the weight, single or twins etc. You do not want to lug the motor.

 

[Dhadley]

Re: Johnson 130HP Overhaul Complete

Why did it have to be rebuilt?

 

[esiquiolazaro1971]

Re: Johnson 130HP Overhaul Complete

I blew the #4 cylinder. Why this happened, I am not quite sure. I am leaning to carbon build up. I also found some water in the carb for that cylinder.<br /><br />I tried searching for more information but I did find any. Any more help anyone can provide would be helpful.

 

[R.Johnson]

Re: Johnson 130HP Overhaul Complete

These are roller bearing engines, top, to bottom. What do you think you are going to break in? At most, piston rings. Break-in is a term that refuse's to die. Did you change the break-in oil on the new family car after 500 miles? If not! Why not? I'll bet it cost as much as your outboard. Did you keep it below 50 for the first 10 hour's, and constantly change speed. The family car is a sleeve bearing engine. Did it break, after your carefull break-in? Or did you just ignore the break-in?

 

[esiquiolazaro1971]

Re: Johnson 130HP Overhaul Complete

What are you talking about R.Johnson? Family car, etc. You just plain lost me. Maybe you know what you wanted to say, but I sure didn't. Why don't you just slow down a bit. I am asking for some advise because I want to be sure.<br /><br />If in your opinion you don't believe any break-in is necessary, just say so. I will weigh it against in other helpful advise given. Just do it without any type of attitude.

 

[R.Johnson]

Re: Johnson 130HP Overhaul Complete

I'm sorry I came across to hard on my opinion. It's just that I feel there is just to much misinformation put out on the care of these engines. There is so many opinion's as to proper oil, fuel, gear lube, etc, etc. Opinion is what you feel is the right way to do things, Fact is the right way. To say I'm right about anything, I like to have fact's to back it up. As to the proper way to break in an engine! To quote Mark Twain " I'm gratified to answer promply! I don't know"

 

[OBJ]

Re: Johnson 130HP Overhaul Complete

I agree with solittle Red....break it in slow and easy. Make sure "all the cylinders are there". Don't know what all you put into the engine but an easy break don't hurt. Look for leaks and stuff like that during the process and don't forget to retorque the heads after the first time out.<br /><br />Gotta ask....did ya' rebuild the carbs also?

 

[DJ]

Re: Johnson 130HP Overhaul Complete

If the break in period were not important, why would EVERY maker of 2-stroke outboards demand that it be followed? By the way, the break in period for all makers is remarkably similer. Coincedence? I don't think so.<br /><br />Yes, 2-stroke engines, today, are "jeweled" (needle/roller bearings.<br /><br />Those bearing and rings still throw off microscopic metal particles. The extra oil (25:1) helps wash out those particles. 2-stroke engines DO NOT have oil filters or crankcases, thus the automotive analogy is pointless.<br /><br />As Dhadley mentioned, I would be most concerned WHY it failed in the first place. Yes, stuck rings could do it, yet the most common failure is the leaning out of one cylinder. Did the carbs. get rebuilt? If not, I wouldn't start it until they are.<br /><br />Break it in like this.<br /><br />1. Double oil.<br /><br />2. Idle only for first ten minutes.<br /><br />3. Do not exceed 3000 RPM for the next hour. VARY throttle setting often. (this seats the rings).<br /><br />4. Second hour-brief (less than one minute) bursts of wide open are OK. Keep rpms below 4K. Again, vary speed often.<br /><br />5. Third hour, refrain from extended periods of WOT.<br /><br />6. Continue varying speed and short burst only of WOT until tenth hour.

 

[esiquiolazaro1971]

Re: Johnson 130HP Overhaul Complete

Thanks for all the advise. I did have all four carbs rebuilt as well. I will be taking it out this coming weekend and will follow DJ's advise. I will let you know how it goes.<br /><br />Thanks again.

 

[Dhadley]

Re: Johnson 130HP Overhaul Complete

I would keep a very close watch on the number 4 cylinder since were not positive as to why it "blew" (horrible term). We need to determine the cause and fix that to prevent a repeat performance on this motor.<br /><br />What fuel/oil and ratio? What spark plugs? What timing?