How much would it cost to rebuild my inline 6?

[ZmOz]

As some of you know...I did a little experiment to see how long my '74 150hp inline 6 runs without oil - not long. Someone is offering me a 140hp for cheap, I thought I would be able to meet him somewhere to pick it up, but now I'm going to have to ship it...and that's going to be VERY expensive. (anybody ship an outboard before?) <br /><br />Anyway - How much do you think it would cost me to get my block bored out and replace the pistons? Is it possible to just bore 1 or two of the cylinders?

 

[The Marine Doctor]

Re: How much would it cost to rebuild my inline 6?

Have you torn down your engine yet? If you ran without oil...you might need more than just pistons.<br /><br />TMD

 

[ZmOz]

Re: How much would it cost to rebuild my inline 6?

No, I haven't torn it down yet, but I removed the covers on the side of the engine, don't remember what they are called, but everything looked to be in perfect condition except the #3 piston...which is definately seriously damaged. Turns over fine, although slower because of the piston, and ran for a few hours after I put oil in it...then just wouldn't turn over fast enough to start. For now...let's just assume all I need is boring and new pistons.

 

[The Marine Doctor]

Re: How much would it cost to rebuild my inline 6?

You will have to find someone who has an American parts list. Mine is Canadian.<br /><br />TMD

 

[briannh1234]

Re: How much would it cost to rebuild my inline 6?

Oz -<br /><br />Sorry to hear about your motor. I did read your other post. Your picture looked just like my motor after it died - except mine ate the number 2 piston. At least you have a definite cause - operator error. I am still not exactly positive what caused mine to fail, but I know that I added oil to the gas.<br /><br />That 140 sounds nice. You may want to rethink it. Give it a compression test etc and find a cheap way to get it home. Then rebuild the carbs - water pump - change lower unit oil - grease the thing - and give it a try.<br /><br />Rebuilding is a lot more work than I was prepared for - but I have no experence with this stuff at all. Once you get it apart you will want #3 cylinder bored, and probably #4. So those two cylinders will need new oversized pistons - I found them for about $70 each. Each bore cost me $60 bucks each. And the other 4 cylinders - you are gunna want new rings right? Well - you can't get rings for those pistons so guess what - you will need another 4 regular sized pistons and you will need all your cylinders honed so the new rings seat right. On top of that you will need all new gaskets, some new nut's and bolt's, etc... If you break any bolts during disassembly the machine shop can get them out - $18 each. There's probably some more that I forgot.<br /><br />TMD had it right - you need to take it apart to see what else went bad. Fried bearings? bend any rods?<br /><br />All added up it is less that the rebuilt head's they offer on this site - but not by much. If I had any extra money over this summer I would have considered that option a little more.<br /><br />Good luck on whatever you decide.

 

[shelbydriver]

Re: How much would it cost to rebuild my inline 6?

I priced a do it your self rebuild kit and it was 750 alone. Not sure if it included pistons even or not.<br />Tim <br />94 merc liter