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lower unit question
Posted on 6/19/16 at 8:54 am
Posted on 6/19/16 at 8:54 am
anyone ever replace a lower unit themself?
4
Posted on 6/19/16 at 9:33 am to mack the knife
Yep. Lots of times. It's easy.
Posted on 6/19/16 at 9:35 am to dragboatscott
it dosent look too difficult but ive been known to bite off more than i can chew sometimes.
any tips or secrets that i should know?
any tips or secrets that i should know?
Posted on 6/19/16 at 9:36 am to mack the knife
What size engine is it on?
Posted on 6/19/16 at 9:42 am to dragboatscott
200 hp mercury saltwater, 2004
Posted on 6/19/16 at 9:47 am to mack the knife
Do you have to swap over any parts from the old lower unit? Or is a straight swap?
Also, why are you replacing it in stead of fixing it? Is the case split?
Also, why are you replacing it in stead of fixing it? Is the case split?
This post was edited on 6/19/16 at 9:48 am
Posted on 6/19/16 at 10:11 am to mack the knife
Make sure ALL of the bolts are out of it before you try to pry on anything. Some models have "hidden" bolts. Some Mercury's have a bolt that come from the top and threads into the anode on the cavitation plate. Make sure the shift shafts is undone as well, again some models are different in how they attach. When you put it back on you'll probably need to rotate the flywheel to get the driveshaft splines to line up. Don't force anything
Posted on 6/19/16 at 10:18 am to mack the knife
has the lower unit every been dropped before?
if not and its 12 yrs old you are going to have a struggle
there will cussing and possible busted knuckles
if not and its 12 yrs old you are going to have a struggle
there will cussing and possible busted knuckles
Posted on 6/19/16 at 10:32 am to cgrand
Yeah if it's spent of life in the saltwater,I retract my easy statement, there's a good chance the mating surfaces are welded together from oxidation. Soak them in some penetrating oil for awhile, that helps sometimes. I have a good friend that ownes a dealership in D'Ibervillle and they have an anchor point in the floor of the shop and have had to pull them off with chain hoist!!
This post was edited on 6/19/16 at 10:36 am
Posted on 6/19/16 at 10:34 am to dragboatscott
what's your buddy's place?
I have pontoon boat in Gulfport getting re-trailered that needs an outboard
I have pontoon boat in Gulfport getting re-trailered that needs an outboard
Posted on 6/19/16 at 10:37 am to cgrand
Crown Leisure Marine, I highly recommend them. They know their stuff and Mr. Phillip and Chris are great people.
Posted on 6/19/16 at 11:41 am to dragboatscott
That's who I just bought my frontier from...that's all I got haha good luck with the replacement
Posted on 6/19/16 at 12:03 pm to Barf
the case/housing is fine. i didnt hit anything. one of the gaskets on the drain/vent plugs failed at some point. salt water dosent lube moving parts too well
Posted on 6/19/16 at 12:15 pm to mack the knife
quote:
one of the gaskets on the drain/vent plugs failed at some point. salt water dosent lube moving parts too well
I kind of think that is NOT your problem. Shaft seal most likely. Those Merc's are know for that. Had twins and both had to be done.
Best to take it to a shop if you need a new seal. There are shims in the lower unit and also you need the right tools. Sometimes a torch is needed. Before breaking it down, it needs to be pressure tested to find out were it is leaking into the unit.
Posted on 6/19/16 at 12:19 pm to fishfighter
nope, trust me the gaskets on the drain and vent plugs failed. i pulled both out when i got back yesterday: one gasket was nothing but light blue mush and the other was only a blue coloring on both the inside face of the plug head and on the vent hole mating surface
Posted on 6/19/16 at 12:23 pm to mack the knife
Did water get in it?
Posted on 6/19/16 at 12:55 pm to mack the knife
It's not that difficult. Getting it off is easy. Just make sure you find all the bolts. Getting it back on isn't so bad just take your time and make sure you have a friend or two to help. Not a one man job.
Posted on 6/19/16 at 1:19 pm to tilco
Did I on my V6 Yamaha. Easy to get off and replace the water pump but it needed seals so I took it off again and took it to a dealer for the seal job. They changed them all out and pressure tested for $200. Back on in Ten min no sweat.
Posted on 6/19/16 at 1:36 pm to fishfighter
yep
Posted on 6/19/16 at 1:39 pm to mack the knife
Yes, I have a 1993 evinrude 70 hp vro that I rebuilt 8 yrs ago the lower unit no problems.
Two specialty tools you will need are the guage to measure to see if you need shims and long reach needle nose pliers with groove. I made my own Pliers with grooves to take out the rings out.
I also bought a used 2010 evinrude etec for $1,500 that had a bad bearing in the lower and cracked oil tank. I rebuilt the lower unit since it is very similar to the old 70 hp evinrude no issues. I could not beat the price and it is great on gas.
If memory serve me right the pressure to check on the evinrude lower unit is 12 lbs.
Two specialty tools you will need are the guage to measure to see if you need shims and long reach needle nose pliers with groove. I made my own Pliers with grooves to take out the rings out.
I also bought a used 2010 evinrude etec for $1,500 that had a bad bearing in the lower and cracked oil tank. I rebuilt the lower unit since it is very similar to the old 70 hp evinrude no issues. I could not beat the price and it is great on gas.
If memory serve me right the pressure to check on the evinrude lower unit is 12 lbs.
This post was edited on 6/19/16 at 1:44 pm
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