OK, I have the following:
1978' - 175hp (Evinrude)
1983' - 175hp (Evinrude)
1990' - 150hp (Johnson GT)
(Don't have the exact model #'s here with me at work, but can edit them in later if you need them).
The 1978'-175HP ran lean and burned 2 pistons. (Block is immaculate, very very clean, no corrosion, all bolts came out easily, etc.)
The 1983'-175hp overheated pretty badly, locked up, but freed up after it cooled down. (Block is so-so... not sure why it overheated, need to delve deeper, but has quite a bit of corrosion).
The 1990'-150hp I never ran on the water, but assume it overheated. It has a cracked block, and the worst corrosion I have ever seen, (completely salt clogged in every single water passage).(Started it up on the stand and it's spewing water from block cracks).
Between all three engines, I have 2 salvageable heads, 1-Left from 1978'-150hp, and 1-right from 1983'-175hp. I have shopped around and If i need to buy a set of heads, the only ones I can find still available in the range here, are 1982'-235hp heads. (#327124/327125).
Sorry for long back information, but relevant to my question(s). I need to try and take all three of these and put them together into one working motor. The block from the 78'-175hp and the pistons from the 90'-150hp, seem to be the best combination. I am not sure about bore sizes and what parts are good to interchange with what, so... here are my question(s):
1. Will the pistons/crank assembly from the 1990'-150hp fit into the block for the 1978'-175hp?
1.a.(if not, will the pistons/crank from the 83'-175hp fit in the 78' block)?
2. If I use the 150HP-pistons and everything else from the 175hp(Carbs, heads, etc.), will I reduce my HP?
3. Will it be ok to use the intermix year heads? and will the 83'-175hp head be ok on the 78'-175hp block?
4. If I need to use the 1982'-235hp heads, will they just bolt on, or would i have to do additional machine work?
Thanks in advance for any and all help you can provide. I dont want to dump 500+ into putting this thing back together only to find it it locks because something doesnt fit.
1978' - 175hp (Evinrude)
1983' - 175hp (Evinrude)
1990' - 150hp (Johnson GT)
(Don't have the exact model #'s here with me at work, but can edit them in later if you need them).
The 1978'-175HP ran lean and burned 2 pistons. (Block is immaculate, very very clean, no corrosion, all bolts came out easily, etc.)
The 1983'-175hp overheated pretty badly, locked up, but freed up after it cooled down. (Block is so-so... not sure why it overheated, need to delve deeper, but has quite a bit of corrosion).
The 1990'-150hp I never ran on the water, but assume it overheated. It has a cracked block, and the worst corrosion I have ever seen, (completely salt clogged in every single water passage).(Started it up on the stand and it's spewing water from block cracks).
Between all three engines, I have 2 salvageable heads, 1-Left from 1978'-150hp, and 1-right from 1983'-175hp. I have shopped around and If i need to buy a set of heads, the only ones I can find still available in the range here, are 1982'-235hp heads. (#327124/327125).
Sorry for long back information, but relevant to my question(s). I need to try and take all three of these and put them together into one working motor. The block from the 78'-175hp and the pistons from the 90'-150hp, seem to be the best combination. I am not sure about bore sizes and what parts are good to interchange with what, so... here are my question(s):
1. Will the pistons/crank assembly from the 1990'-150hp fit into the block for the 1978'-175hp?
1.a.(if not, will the pistons/crank from the 83'-175hp fit in the 78' block)?
2. If I use the 150HP-pistons and everything else from the 175hp(Carbs, heads, etc.), will I reduce my HP?
3. Will it be ok to use the intermix year heads? and will the 83'-175hp head be ok on the 78'-175hp block?
4. If I need to use the 1982'-235hp heads, will they just bolt on, or would i have to do additional machine work?
Thanks in advance for any and all help you can provide. I dont want to dump 500+ into putting this thing back together only to find it it locks because something doesnt fit.
