Replacing mercruiser 485

[Firsttimer92]

Well the 170 is smooth but the 485 flywheel had balancing grooves near the outer edge. Can I just pull the studs off the 485 crank and swap the coupling that way?

 

[todhunter]

Boating is seriously more expensive than racing (racing you have sponsors to help)

Good sir, where can I get said sponsors to help me with my race car? I'm coming out of pocket for both race car and boat, so I'm doubly stretched financially, lol.

 

[ccoon520]

Good sir, where can I get said sponsors to help me with my race car? I'm coming out of pocket for both race car and boat, so I'm doubly stretched financially, lol.

win more.


lol just kidding

 

[Scott Danforth]

What ^ he said

Good sir, where can I get said sponsors to help me with my race car?

seriously, win more. My buddy spends less than $1000 a year racing, the rest is sponsors

 

[Firsttimer92]

Well everything swapped and now the motor is mounted in the boat. Anyone have a link to which belt I need for power steering and alternator? I believe it was 2 separate belts correct?

 

[Eric 3.7LX Alpha 1]

These engines never came with a belt driven alternator. They used a stator to charge the battery which sat behind what looks like the harmonic balancer. Belt driven alternators were never added by Mercruiser but aftermarket and boat owners when the factory charging system failed (the water cooled voltage regulator) and is expensive to replace. If you need a belt for it, your going to have to use a piece of string and measure it out and take it to a parts store to match it up.

Power steering was part of the engine but I'm not sure all of the 470 versions....

 

[Firsttimer92]

Well on to bigger fish. I just decided to rebuild the alpha one transom assembly and install it on my boat but I ran into this after pulling the old Mc1 assembly? How boned am I?

 

[Scott Danforth]

you have a boat that is over 15 years old. its part of boat ownership.

do some test drills down below. compared to most transoms, that is in good shape. I have repaired transoms with mushrooms growing out of them in the past.

 

[Firsttimer92]

Well this is my first boat that I have actually dug into so I’m not sure how it’s supposed to look. Can you explain test drills down below?

 

[Firsttimer92]

Well I did the old ball ping test and there is rot throughout the middle of my transom. What would be the easiest way to access the transom since I have storage blocking leafy and right sides.

 

[Scott Danforth]

Well I did the old ball ping test and there is rot throughout the middle of my transom. What would be the easiest way to access the transom since I have storage blocking leafy and right sides.

Step 1 remove the drive
Step 2 remove the motor
Step 3, remove all the interior
Step 4, build a cradle
Step 5, pull the cap
Step 6, suit up
Step 7, cut out all rotten stuff
Step 8, grind grind grind
Step 9, rebuild

 

[Firsttimer92]

The boat is an 82 vip. Is it hard pulling the cap? Seen a few videos but none on a 17’ boat

 

[todhunter]

The boat is an 82 vip. Is it hard pulling the cap? Seen a few videos but none on a 17’ boat

It wasn't too bad on my boat. Start by removing the rub rail and seeing how the cap is held on...screws, rivets, etc. Also, look inside the boat and identify what is attached to the cap and what is attached to the hull, and figure out how you're gong to separate those. My rear bench seat is part of the cap and I had to cut some fiberglass tabbing that was holding it to the hull. After getting everything loose, I separated the cap from the hull, slid in some 2x4's, then had some friends help me lift the cap off and set it on a stand I built.

 

[Scott Danforth]

all the information one would need to rebuild a boat is found here: https://forums.iboats.com/threads/how-tos-and-other-great-information.283508/

start by reading links 14, 15, 18, 2, 3, 4a, and 4b in that order in their entirety. watch every video, read every post.