My motor puked all over it's self!

shicks007 · #1 06-17-2006, 07:45 PM

Had a great day on the river with my two boys, my sister and my niece and nephew. We were tubing and just running around for a couple of hours. Well on the way back towards the boat ramp my motor picked up a bad knock, I slowed down and eventually it stalled. I pulled the heads off today to see if I could see anything, I did not see anything that caught my eye.

Somethings going on inside though, I can't rotate the flywheel all the way around, My buddy and I are thinking maybe a rod bearing or something. Whatcha think?

macojoe · #2 06-17-2006, 09:28 PM

That sucks!!

I know all to well that sound of that!! Mine had the ring fail and its all over the cylinder wall! >:(

Skools Out · #3 06-19-2006, 02:37 AM

shouldn't be a rod bearing they are all roller bearings. in an outboard that is.

bootster · #4 06-19-2006, 03:05 AM

I thought you were going to describe what happened to me the first year I had my V20. I have an I/O and having not been familiar with them,didn't winterize it correctly :o. My neighbor and I went to winterize it in Jan. I started it up and Ovaltine shot up about a foot in the center of the engine!

As it turned out,the block had a footlong crack in it,and the rockers had completely separated from the head.

On the way home from work,my neighbor showed me an auto rag with a Chevy straight 6 250 for sale. By the next weekend I had it up and running again.

Paid $650 for the boat and trailer,around $300 to fix the block,and I was back in buisness.

76GMC1500 · #5 06-19-2006, 04:18 AM

I/O's are a wonderful thing for many reasons. Primarily, YOU can fix them. Screw the dealer. Secondly, parts is cheap. You can buy a brand new 260hp Chevy 350 for $1200 and spend about $70 to marinize it.

76GMC1500 · #6 06-19-2006, 04:22 AM

Quote:

Originally Posted by Skools Out

shouldn't be a rod bearing they are all roller bearings. in an outboard that is.

So are the mains and wrist pin bearings.

The rule of thumb for us 4-stroke guys is that if it frees up as it cools down, it's a cylinder seizure. If it freezes up solid as it cools, it's a spun bearing. Since you don't have babbit bearings, this doesn't really apply to you. It is possible to seize a cylinder and lock it up permantently. But from the sounds of it, you're getting some movement? A rod bearing is possible and likely.

shicks007 · #7 06-19-2006, 08:02 AM

Sorry guys, forgot to say what kind of motor it is. It's a 1985 140 hp Evinrude.

I would say it's not in the cylinders, the walls look pretty good and all the pistons move when I rotate the flywheel.

Another thing........now that I have rotated it around a little bit( probably 180 deg.), I can only move it about 45 deg (either way).

pikfish · #8 06-19-2006, 06:06 PM

My question would be, does it move almost normal between solid stops? If so I would quess a broken rod. Anyway from here the powerhead needs to be disassembled. Sorry for your bad luck. Were you using premix fuel?

Skools Out · #9 06-20-2006, 01:44 AM

is yours a late 85 140 or early? late were looper small bore early were cross-flow. Will it rotate a complete circle and will all 4 pistons move with the crank? it could have a broken main crank ring. *

GMC no the only mains that are rollers are the 2 end caps. the mid area between the cylinders are crank rings.glad someone likes an I/O. O/B all the way. Hate the one I/O i have in my 250 Sea Ray.

shicks007 · #10 06-20-2006, 07:57 AM

Well, the power head is sitting on my workbench. I'll start pulling it down to see what the problem is and keep you informed. Iv'e never had one apart so if you guys with experience have any tips or pointers, I would apreciate hearing them.

Skools, From the research I did on the motor when I first got it, I came to the conclusion it was a looper. I caould post the numbers if that would help.

Sorry, I should have started this thread under repairs.