Logo
FULL SITE MENU

F200 2014 Connecting Rod Big End Diameter

E

EricPedersen

New member
Does anyone know how to read the numbers on the connecting rod shaft? Especially to match the color coded bearings. Maybe someone could post the page in the shop manual that shows how to read those numbers? Manual states "Example: if the connecting rod big end inside diameter is "05" and the crankshaft...". The question is where do I find the 05 (or whatever my number is) on the shaft (if the connecting rod big end inside diameter is "05")? Thank You, Eric
 
If you are doing major work on your motor why do you not have the service manual available?

What is the complete model of the motor? I4 or V6? They are not all the same.
 
I will guess that you have an I4 F200XX of some kind.

You measure the ID of the con rod big end. Say it is 55.993 mm.

You look at the stampings on the crank shaft that corresponds with the journal to which you will attach the connecting rod. Say it is 81.

You take the last two digits of 55.993 (93) and use that number together with the number 81 from the stamping, to derive the bearing colour(s) from the table that is in the service manual.
 
Thanks so much boscoe, I have a manual on order, the parts are coming first though. Anyway, you are exactly correct on model, 4 cyl, LF200XCA. I bought it used, first time out spun #2 connecting rod bearing. After disassembly, you can obviously see that he powerhead is a fresh rebuilt, everything looks brand new. Before I took it out, fresh oil and filter, it never lost oil pressure or overheated, I don't get it...
 
What about this, I don't see any table entry that has "blue-blue", but the bearings appear to all be coded blue. Does the math say "blue-blue=spun bearing"?
 
Could green be mistaken for blue?

I am wondering if someone ahead of you used two blue bearings instead of one blue and one green?

Or perhaps there are two greens that look blue?

Bearing colours are

 
Last edited:
Hmmm... See pic, they look like same color
1747858243771.jpg
 
It took me quite a while to get used to Yamaha's way of doing bearing selections. I am still not all that comfortable with it still.

What is the engine ID? Some Yams use pink bearings and some don't.

Those look pink to me. Am I going colour blind?
 
Last edited:
I ordered the parts form boats.net, they only list Blue, Green, and Yellow Conn rod bearings for a 2014 LF200XCA, yeh the color is off, but I think they must have been blue. Unless they are completely wrong. Is it normal for the bearing width to be significantly be narrower than rod? like 1/64 in on both sides?

0521251742a.jpg
0521251742a.jpg
 
I think I see what happened.

The 6CB prefix bearings (blue, green and yellow) were superceded by 6JD prefix bearings which are red, pink and black.
 
I ordered the 6CB, but looks like it's what you say, superseded by 6JD, but I hope the color hasn't changed, then they wouldn't match the chart in the manual... below pic is from the actual invoice

Capture.PNG
 
So like I said, the powerhead looked like new, fresh rebuild (new oil pump). In an abundance of caution, I'm replacing the Rod that spun. In your opinion, what do you thing caused the bearing to spin?
 
Give me some time to check with Yamaha. Something is not adding up.

With the change in bearing colours the connecting rod was changed. Old connecting rods still available but old bearings are not.

Hmmm!
 
Connecting Rod change? Oh no, hope not, p/n does not show superseded. I bought a new one to replace the one that spun. The new bearing colors and P/N's seem to directly relate to the old, the only difference seems to be 6CB to 6JD, maybe a material diff? 20-00 goes from Blue to Red, 10-00 goes from Green to Pink, and 00-00 goes from Yellow to Black.
 
Hopefully this completes this thread, believe the root cause was out of limit Rods, don't understand this, but the Rod that spun was out of limits on the low side, under limit? Two others were over, one was in limit "A" dimension, but not round. Replacing all Rods.
 
Back
Top