So this isn't the head gaskets you replaced. It's just the water jacket. If you'd pulled the head off we would be able to see the pistons (not just through the spark plug holes). You should change the title, I just spent 7 minutes watching the wrong thing because the title was misleading....just saying....
I have an earlier model 40hp, same but different basically. My problem is no water. Replacing the pump and at least 3 fins of the impellar are unaccounted for. I just know they are clogging the water jackets passages somewhere but i don't want to deal with the same issues you had. Just have to cross my fingers.
I'm surprised how clean it was in there. I made sure to flush it every time I took it out of the water. Salt here in San Diego. Hey, thanks for watching. I hope your 40 Merc holds up!
@@Sea2SeaAdventures well for one you used an open ended wrench. You used no heat, No impact gun and not any kind of penetrating oil. So yeah. This is what happens. Btw you didnt replace the head gasket and you also didn't need to even replace the water jacket gasket in the first place
Thanks for your video, I'm trying to get the extractor key for the tail of that same engine and I can't find it anywhere and many mechanics don't even have that key. Can you help me know where I can get that key?
When I'm looking for a part number, I use MarineEngine.com. I'll go through their section and it will have an exploded view of all the parts. I hope you find it.
Drilled out the bolt hole, oversized, epoxy, let cure for a couple days. Drilled the new hole, tapped for new insert, put in the insert and bolted it together. Made sure to not over torque. I ended up selling that motor, soon after. Disclosed it of course.
Yeah, I was nervous about stripping out the threads. I took it out one time, then I sold it. The water jacket looked like it didn’t have much buildup. I should have just left it alone. 🤣🤣
I have a problem with water coming in my 1999 25 hp mercury. It looks like the water is shooting out from the bottom of the exhaust cover. Would I likely just replace both gaskets? How would I know how much to torque those bolts?
dude, I have the same motor; this week I took off the head and broke 3 bolts flush with the body; how did your father-in-law get them out? did he drill and then tap the holes? I wish that I never took it off.
As soon as that first bolt turned loose, I thought the same thing. Drilled them out and used Helicoils on two of them. One was drilled out so bad that we used epoxy to fill the large gap, drilled, taped with a Helicoil. I put that motor back together and sold it, making sure I told them about it of course. I went with a Mercury 20 with EFI. Then I sold that boat, unrelated to the motor. Good luck.
@@jacksonjacko8301 J-B Weld. One of them I didn’t remove enough material and when I was tapping it out for the Helicoil, it shifted the alignment of the threads slightly. Still held water afterwards. Good luck with your project.
Were you able to get the bottom bolts of the water jacket cover out without removing any of the cowling.? I have a 2001 25 merc that doesn't look like theres room to get the bolts out.
I managed to get a slight turn on the bolt that was leaking and it stopped for now. I have the gaskets if I ever need them. I do believe that the four bolts inside will loosen the bottom portion of the cowling enough to get it out of the way for those bottom bolts. I just barely got one of the thermostat bolts out without snapping it. It will need a tap run down the hole to clean up the threads for a new bolt
Have you ran it with the top cowling off to see where it's from? This power head did not like being taken apart. I'm in salt water, so I was able to see salt buildup where it was leaking. I ended up replacing the motor with a 20 EFI... Then I sold that boat because I needed/wanted something bigger.
So this isn't the head gaskets you replaced. It's just the water jacket. If you'd pulled the head off we would be able to see the pistons (not just through the spark plug holes). You should change the title, I just spent 7 minutes watching the wrong thing because the title was misleading....just saying....
in this engine there are no "headgasket" :) block will separate from crankshaft
These engines don't have a Cylinder Head.... Therefore no head gasket. You removed the water jacket gasket.
Wow that was a lot of work! But good call on going with the new 20 EFI.
I have an earlier model 40hp, same but different basically. My problem is no water. Replacing the pump and at least 3 fins of the impellar are unaccounted for. I just know they are clogging the water jackets passages somewhere but i don't want to deal with the same issues you had. Just have to cross my fingers.
I'm surprised how clean it was in there. I made sure to flush it every time I took it out of the water. Salt here in San Diego.
Hey, thanks for watching. I hope your 40 Merc holds up!
@@Sea2SeaAdventures well for one you used an open ended wrench. You used no heat, No impact gun and not any kind of penetrating oil. So yeah. This is what happens. Btw you didnt replace the head gasket and you also didn't need to even replace the water jacket gasket in the first place
Thanks for your video, I'm trying to get the extractor key for the tail of that same engine and I can't find it anywhere and many mechanics don't even have that key. Can you help me know where I can get that key?
When I'm looking for a part number, I use MarineEngine.com.
I'll go through their section and it will have an exploded view of all the parts. I hope you find it.
what sort of epoxy if you remember, and how did you go through the process, thanks in advance have 6 of them to do a Mercury 25
Drilled out the bolt hole, oversized, epoxy, let cure for a couple days. Drilled the new hole, tapped for new insert, put in the insert and bolted it together. Made sure to not over torque.
I ended up selling that motor, soon after. Disclosed it of course.
Do you remember what you torqued the exhaust manifold and water jacket bolts to?
Sorry, no I don't. I was to nervous about stripping out the threads.
I would have heated the broken studs up and took vice grips and took them right out plus your water jacket was still leaking but good try
Yeah, I was nervous about stripping out the threads. I took it out one time, then I sold it. The water jacket looked like it didn’t have much buildup. I should have just left it alone. 🤣🤣
Hi, could you tell me the site where I can buy the gasket kit? Thank you
I got the parts from MarineEngine.com.
I have a problem with water coming in my 1999 25 hp mercury. It looks like the water is shooting out from the bottom of the exhaust cover. Would I likely just replace both gaskets? How would I know how much to torque those bolts?
I don’t have the torque specs, but with the amount of bolts that I broke off, I didn’t trust torquing them over 20 ish flbs. Good luck.
dude, I have the same motor; this week I took off the head and broke 3 bolts flush with the body; how did your father-in-law get them out? did he drill and then tap the holes? I wish that I never took it off.
As soon as that first bolt turned loose, I thought the same thing.
Drilled them out and used Helicoils on two of them. One was drilled out so bad that we used epoxy to fill the large gap, drilled, taped with a Helicoil. I put that motor back together and sold it, making sure I told them about it of course. I went with a Mercury 20 with EFI.
Then I sold that boat, unrelated to the motor.
Good luck.
@@Sea2SeaAdventures what sort of epoxy if you remember, and how did you go through the process, thanks in advance have 6 of them to do a Mercury 25
@@jacksonjacko8301 J-B Weld. One of them I didn’t remove enough material and when I was tapping it out for the Helicoil, it shifted the alignment of the threads slightly. Still held water afterwards. Good luck with your project.
@@Sea2SeaAdventures cheers
Your spark advance rod is at maximum length ?
I’m not sure. I wish I could help you. I sold it and put on the Mercury 20HP EFI.
Were you able to get the bottom bolts of the water jacket cover out without removing any of the cowling.? I have a 2001 25 merc that doesn't look like theres room to get the bolts out.
2 bottom bolts would need to cowling removed if drilling out
I managed to get a slight turn on the bolt that was leaking and it stopped for now. I have the gaskets if I ever need them. I do believe that the four bolts inside will loosen the bottom portion of the cowling enough to get it out of the way for those bottom bolts. I just barely got one of the thermostat bolts out without snapping it. It will need a tap run down the hole to clean up the threads for a new bolt
@@doug7639 lucky I’ve just finished drilling out 6 and 3 easy outs now taking the power head off too be able to drill the bottom one
@@jacksonjacko8301 🤦🏼 that sucks. What saved me was a product from wurth. Their rostoff penetrating spray is amazing.
@@doug7639 will give it a try
My motor has water underneath too but i cant see where the water is coming from
Would’ve been you base gasket
Can you order this online??
I ordered the gaskets from MarineEngine.com.
Use your motors model and serial number to find parts for your outboard.
Looks like you still have a leak
Yeah... Ha Ha, I sold the 2-stroke and put a Merc 20.
My 25 is getting water in motor
Have you ran it with the top cowling off to see where it's from? This power head did not like being taken apart.
I'm in salt water, so I was able to see salt buildup where it was leaking.
I ended up replacing the motor with a 20 EFI... Then I sold that boat because I needed/wanted something bigger.
Any ideas
Did you find out where your water was coming from?