I was hoping to get back on the water soon- Guess not now

Late last summer the boat was not producing power (it's a 2001 Mercury 25HP bigfoot) and I discovered the fuel line to the tank was deteriorated. I replaced and cleaned everything the in fuel system but she still wouldn't produce power and now had a noticeable knocking noise. I had a crazy fall, winter and spring and just now had time to start thinking about the boat again. I thought the tick was valve train related but that checked out.



I pulled the head and found the cylinder walls scored.
Attachment 205412Attachment 205413

Dug deeper and found a spun bearing and a scored crank journal

Attachment 205415Attachment 205416Attachment 205417

Now wondering what to do with the pile of parts

Attachment 205418
I can rebuild for about $400 in parts plus machine work (who knows how much that will be)

I can try to find a remanufactured powerhead (scoured the internet and haven't found one yet)

Repower for about $4000 if I stay with the 25 or $5000 if I bump up the the max rated 40hp

I would go for a newer motor if I had the $. You're probably looking at at least $800 to rework your pile of parts (conservative), and no guarantee that you will get many hours out of your investment. Looks like a re-bore job, oversize pistons, and some other new parts considering the wear that I can see in your pics. A long tow rope would be a good idea too, just for insurance.

B-

You have my sympathy... I'd go to eds marine and get a new one.

yep.

Mercury Outboards

Quote:

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Originally Posted by Ranger690

yep.

Mercury Outboards

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Great prices listed there. :ThumbsUp

Get yourself a kayak and you will never have to worry about costly engine repairs,gas, oil, etc again. Only have to worry about how close the hole is to where you can launch it from.:twocents

I went the rebuilt route. New bearings, rings, gasket set and one connecting rod only set me back $300. Again Amazon amazed me with their offerings so I bought the parts via a bookstore


Sent the crankshaft to an old timer in Ohio who only does crankshafts. Welding and grinding plus honing the cylinders ran $200.

Spent Sunday putting everything back together and fired it up last night. Purrs like a kitten. The in water test was today and she ran like a champ. Time to change the oil and continue the break in period.

All in all the rebuilt was very easy and I'm confidant that I'll get my value out of the $$$ spent.

However knowing how machines work I'll report back if something changes.

WTG Jim. Glad to hear you got it going.

Great job.

Did you find what caused the damage?