Heads removed for inspection 150 johnson

Chattanooga Fishing Forum

Help Support Chattanooga Fishing Forum:

Jofly

Well-known member
Joined
Feb 1, 2010
Messages
105
I pulled the heads to inspect the cylinders. It has already been rebuilt. All top four pistons have .030 stamped on them. There was traces of oil and water inside the cylinders. I found milky oil in one of the heads when I removed it. The pistons are loose in the cylinders, not a lot just a little maybe .005. They are coated in carbon, the sleeves are smooth but scratched and worn in some places. Take a look and let me know what you think. Also this fuel pump system dosent match my manual, the vro was taken off, can anyone explain it? 2 fuel pumps???
 

Attachments

  • IMG_1258-Optimized.jpg
    IMG_1258-Optimized.jpg
    84.2 KB
  • IMG_1259-Optimized.jpg
    IMG_1259-Optimized.jpg
    69.3 KB
  • IMG_1261-Optimized.jpg
    IMG_1261-Optimized.jpg
    92.8 KB
  • IMG_1262-Optimized.jpg
    IMG_1262-Optimized.jpg
    80.4 KB
  • IMG_1263-Optimized.jpg
    IMG_1263-Optimized.jpg
    78.7 KB
  • IMG_1266-Optimized.jpg
    IMG_1266-Optimized.jpg
    73.4 KB
  • IMG_1268-Optimized.jpg
    IMG_1268-Optimized.jpg
    89.6 KB
  • IMG_1269-Optimized.jpg
    IMG_1269-Optimized.jpg
    84.8 KB
  • IMG_1271-Optimized.jpg
    IMG_1271-Optimized.jpg
    83.3 KB
  • IMG_1277-Optimized.jpg
    IMG_1277-Optimized.jpg
    80.2 KB
Is that rust in the cylinders in some????? Are they scratched??? Can't tell much about the pictures.

You have tooooooo many post! LOL!!!

The duel fuel pumps are off of around a 83- back 90* X-flow. They are also a upgrade kit. They can be rebuilt.

The combustion chambers of the heads don't look correct. What are the part numbers on them??? They will be the same number except the last digit.

Look on the engine for the model number. It will be in a "freeze" plug on top of the block near the heads. The pumps and heads makes me think it may not be a 88 or just a Frankenstein!!!! . The GT heads are rounded in the chambers.

Here is a list of Part numbers for the heads. The part numbers of your heads should be 328324 and 328325
 

Attachments

  • crossflow%20heads.jpg
    crossflow%20heads.jpg
    31.5 KB
OH yeah, Those pistons will have a TON of slop in them.

On the power packs, What are the numbers on them?????
 
I'll check the part #'s on the head themselves tonight, If I use the model # on the mounting bracket which is J150stlcca It shows the heads are part
# 332544, and 332545, I didnt even see them on your list. I saw the Part # you suggested on a model # J150cxcca. I dont know what I have any more except frustation.
And yes there does appear to be rust in the cylinders. I will look on the power packs for a number to night. I will also try to take some bore measurments.
So based on what you are seeing, by pictures only I know, do you suggest a rebuild? I'm thinking a pro needs to put his hands on it and take a close look and see what he has to say.
Are you doing anything May 17th? Maybe you can figure out what I have. I know I have Evinrude foot, I know the mounting bracket is an 88, I check the part number on the block tonight when I get home.
 
It is easy to put a 82 model engine on a 88 mid. That is why I want to know what is on the core "freeze" plug on top of the block. If it is the original, it will have the same model and serial
number as the mid. The later packs have 5800 limiters in them and the early version did not. Post what you have. emoToast
 
DUH!!!!!!!!!!!!!!!!!!!!!!!!!!!! emoBang emoBang emoBang The 332544/545 are th GT/XP heads. I need to update my list!!!! The 328324/325 are the "STANDARD" 150 heads. I
went to storage and pulled a 150 GT head and you can see the part number in the one pic and the "ROUNDED" combustion chambers. I bet you will find the head you have are
off of a late 70's early 80's engine. Still they will fit any 149CI X-flow up to 1990. Still may be just a case of Frankenstein.
 

Attachments

  • P1080381(1).JPG
    P1080381(1).JPG
    78.3 KB
  • P1080383(1).JPG
    P1080383(1).JPG
    84.2 KB
Ok looks like a mad scientest project, I'll post the numbers you asked for tonight when I get home. My heads DO NOT look like that. I bet your right. If you are how do I make it a true GT, Do i just get the right heads? I'll post my #'s and we will go from there..... I think I will be meeting you if you are availabe in the near future.
Thanks
 
Heads and carbs would be needed to make a GT. Porting is the same. Real interested in what numbers are in the plug on the top of the engine.
 
Ok, #'s on freeze plug: J150TLCDC, below that, J7153655 This tells me the block is a rebuilt 86I havent researched it further. The power pack # is :CD6/58L, then 582651Oa11T9.
the heads are the standard 328324-5. So What have I got, Most likely a non gt 86???? I know what to look for next time I buy a boat............
 
The block is a 86 standard 150. The power packs are used only on 1985 OMC engines according to my list with a 5800 limiter. It looks like a Frankenstein. There is nothing wrong with it.
There is things that can be done to it. If it has 1 3/8 carbs on it, they are more than likely the GT series or the old 235 carbs. Hard lesson learned. emoBang emoBang emoBang
Don't get any thoughts....... emoEnforce emoEnforce emoEnforce
 
The carb part # is 330164 couldnt find them on an 86 model or the 88 model. If I buy the right carbs, the right heads, and right power packs will i be close to where I need to be or is there more I'm not thinking about?
 
You say 1 3/8 is that the throat diameter? I must not have found the right # on the carbs. Should I just start with that block and totalty rebuild with GT parts? Will the crankshaft and all be the same? I'd like to make it right some how......
 
On the carbs,, You will need to remove the air silencer to look at the number on the front. it will read 1 5/16, 1 1/4, 1 3/8, ect. The part number you got off the top is not
going to be listed in the parts catalog. There will be a tag attached to the fuel bowl that will have the number in the catalog. Most of the time they are missing.

Packs are not going to make a difference. Both are limited to 5800. If you replace them, I would go with the earlier version that will not have a rev limiter. JMO emoToast
 
Crank is same. Pistons are different arent they? Guess I'll Keep cross referencing parts.......
 
There are 3 V4/V6 X-flows.....the 3 1/2 and the 3 5/8 bore don't remember the very small X-flow of the the early 70's . The 150 and 150 GT are the same. If
you have any more questions, feel free to call me. emoThumbsup
 
Still researching, carbs will have to be replaced. 1 1/4 stamped on them. The wiring harness is different , coils, stator, and a bunch of other stuff. I dont know enough about the electrical side(and I work at a power plant) to know if all that stuff will swap out. You did a 150 ported to a 200 intrested in doing it again? I'll give you a call on friday, it's my next day off. I want to make my motor right and my boat right. It will take time and $$$$ I can do alot myself but I cant do any machining.
 
The MAJOR differences are a GT 150 has 1 3/8" carbs and heads with a different combustion chamber. The chamber shape can actually effect flow. The reason for the difference in stator numbers is the GT has a 35 amp charging system where the standard 150 has a 10 amp. The 10 amp has a lighter flywheel and is easier on the engine to spin higer rpm's. The coils are actually the same. The late comes as a kit with the plug wire and primary wire. All it takes is one connector to make the harness a different number. Don't look too deep into this. You have a good foundation to start with. On the X-flow the compression can not be raised to gain back bottom end. You have to trade bottom end for top end. Run a over the hub prop to allow it to spool up to get out of the hole. If you port to a 200, you will need to find a set of 200hp 1 5/16 carbs. The 1 3/8 carbs will hurt bottom end. Changing the shape of the port (along with other tricks) can make it have good bottom and top. JMO....
 
Back
Top