Merc trim pump

RidgeRunner · #1 04-20-2011, 02:43 PM

250 Merc EFI Outboard - Is there any way to R&R the integrated style power trim motor without removing the starbd side clamp bracket? The one allen head bolt is buried in the corner. I don't think it possible to get to but it was worth asking the experts. This is one corroded mutha. Previous owner let her sit in the drink long enough for barnacles to grow upon barnacles.

captpete13 · #2 04-20-2011, 07:41 PM

hey Vic,
it is possible with some. I'm not sure about yours. Is your motor held in with 2 allen bolts? I use a long t handle allen wrench or allen sockets with a swivel. Either way it requires a lot of patience.

RidgeRunner · #3 04-21-2011, 06:11 AM

Thanks, that is what I was hoping for. Looks like 3/8" crawlspace, I will try it. Found a later model mid and purchased it Tuesday. I am going to try and fix this one for now, with all the corrosion I know it isn't coming apart without a struggle.

Destroyer · #4 04-21-2011, 09:36 AM

You probably know about it already, but for those that don't, you can buy a great tool at Sears called a hand impact driver. Basically it holds a socket, or a screwdriver bit, and when you hit the head with a hammer if provides a turning force in the direction you want to go and at the same time the force of the impact keeps the bit seated deeply in the bolt so it doesn't round it out. I've found it invaluable to use on phillips head and allen head bolts on motorcycles. It's great for breaking corroded bolts free and it saves a ton of cussing and time. You can buy cheaper units at Harbor Freight and other places, but the Sears one seems to be made exceptionally well. I have several, and the Sears unit I have is well over 30 years old and still works like the day it was bought. You can buy adaptors to hold 1/2" drive allen wrench bits.

http://www.sears.com/shc/s/p_10153_1...1&blockType=G1

RidgeRunner · #5 04-21-2011, 10:33 AM

Thanks Destroyer, bought one in 1985 when dealing with the all the phillips head bolts on Jap cars/trucks. How did they get them so tight without messing up the head anyway? Freeze them first? Definitely one of my favorite tools but don't fit where I need it most. IF I need to dismantle the clamp, that is a winner, followed by the blue wrench, a set of easy outs, drilling, swearing and finally heli-coils. Spraying it all with Blaster every day for a week before I begin. I need to muster some patience before I even start. Considering taking the lower and powerhead loose right off the bat and doing what NYMACk did to his 140, blast and repaint all my corroded parts and pieces to make them look better. But then I want to use the boat ASAP. I am torn.

Destroyer · #6 04-21-2011, 01:55 PM

Quote:

Originally Posted by RidgeRunner

Thanks Destroyer, bought one in 1985 when dealing with the all the phillips head bolts on Jap cars/trucks. How did they get them so tight without messing up the head anyway? Freeze them first? Definitely one of my favorite tools but don't fit where I need it most. IF I need to dismantle the clamp, that is a winner, followed by the blue wrench, a set of easy outs, drilling, swearing and finally heli-coils. Spraying it all with Blaster every day for a week before I begin. I need to muster some patience before I even start. Considering taking the lower and powerhead loose right off the bat and doing what NYMACk did to his 140, blast and repaint all my corroded parts and pieces to make them look better. But then I want to use the boat ASAP. I am torn.

That's a delimina for sure. I think if it was me I'd opt for the repair now and fish, and then file this under "winter project" for the remove/blast/paint/reassemble part of it... but that's just me.

And as to your question about how they got them so tight... I don't know... maybe they used Sears impact drivers? All I know is that when I was riding I was always working on Kaws and Yammies and that tool was the ONLY thing I would use to take out the polished Phillips head machine screws they seem so fond of using on the engine cases... Anything else was just asking for trouble.

spareparts · #7 04-21-2011, 09:19 PM

with your motor on hte bracket, loosen up the motor mounting bolts(top ones more than the bottom) and let the motor tilt back a bit, you can access it from the front side then

reelapeelin · #8 04-21-2011, 10:04 PM

Quote:

Originally Posted by RidgeRunner

But then I want to use the boat ASAP. I am torn.

Go ahead and use it now...wait til the 1st snow and then...oh yeah...ya'll don't even HAVE winter, much less freakin SNOW...LOL!!

I just read about how long you spent on your beautiful CC...after spending a couple of days on it, I'd say 5 yrs WELL SPENT!!...

RidgeRunner · #9 04-22-2011, 09:20 AM

Appreciate the kind words Ozzie, if I was waiting on winter that may take a while. The tip trick on the trim motor might be tried Spare. I will dive in tomorrow and take a few pictures...

RidgeRunner · #10 04-24-2011, 10:20 AM

Snapped off the easy to get to bolt securing the trim motor to the pump housing. It was the second bolt I touched on Sat. The job just got a lot more complicated, I was expecting it. Spent 4 hours on the stb side clamp. She didn't want to move at first. Finally got it loose so I could get the power trim unit out and on the bench. Woke up this morning and noticed a few more gray hairs. Pictures in the am.