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1978 Mercury 70hp - Serial # 4979486 I'm trying to figure out how to remove the water pump base so I can replace the seal around the shaft.

Google Ai tells me the 1978 Mercury 70hp didn't have a Power Trim option. But I'm reading that it came on later models. . Does anyone know if there are newer models that have Power Tilt Trim that can be modified to work with a 1978? I know I can buy a CMC, but I was wondering if there are power...

The line going to it appears to be a small hose line.

1978 Mercury 70hp I've been pulling on it, hitting it with a rubber mallet, and it's stuck good. I sprayed some PB Blaster around the outside to see if that might loosen it. . Any Tips for getting it off without breaking it?

I see people post often to go with Sierra Marine because they have a "Lifetime Warranty". . Has anyone ever had to do a warranty return on their Sierra Marine part? . Sierra Marine says to return it to the seller, and the seller applies for the return authorization. . I can imagine how that...

Just an idea. Maybe others had thought of something similar. In my searching the forums, I hadn't seen this as a suggested fix for a stuck steering shaft - the shaft that the steering rod passes through - properly known as the steering tilt tube. . I wrapped them with clear tubing so the PB...

I have a 1978 Mercury 700. 130+/- compression. I have spark on 1 and 3. I have no spark on cylinder 2. . I'm sure there are several methods of process of elimination. . Here's what I'm thinking. Let me know if this sounds right Test 1 If there is Spark on 1 and No Spark on 2, swap the two...

Assuming it has good compression. Assuming it runs and has a good lower unit. Is it worth keeping? It looks like parts are a little hard to come by than my Johnson.

What does original Styrofoam look like in a 1967 Holiday? . .

It's on FB for over $4000. I won't post a link so I don't break any rules.

I was a little worried that I grabbed the wrong can. I've been using Pennzoil mineral 2-stroke oil, but I figured I'd try full synthetic with my new to me 1994 Johnson. It wasn't much different in color when mixed. So I mixed one gallon of Full Synthetic and one gallon of the Pennzoil mineral. ...

I wanted to make sure I'm going to reinstall the flywheel correctly. . I read some threads about lapping, but I understood that to only be required when trying to pair up a new flywheel to the existing crankshaft. . The OMC Manual just says to clean it with their product. Others suggest acetone...

If I know without a doubt the TDC mark on my 1994 Johnson 90hp v4 Crossflow flywheel is accurate because I checked it to make sure. Can I use the "Joe Reeves" method to verify timing on this motor? . I disconnected the cables. I opened it up to where the carburetors are fully open, the roller in...

I made my own, but my distance between mark A and mark B is 5 inches. My TDC Mark on my flywheel and pointer line up just like they should. . My thinking is my DIY TDC Tool works fine since all we're trying to do is find two reference points in the #1 pistons up travel and down travel. Then...

1994 Johnson 90hp v4 Crossflow. . The throttle Linkage has about 1/4 to 3/8 play. See video. It might be hard to see it, but the plastic outer piece that I'm pushing and pulling allows the inner piece to slide in and out about 1/4 to 3/8. . Is this normal? It makes quite a difference in idle...

When I rev it up, water sprays from behind the exhaust plate. See pictures. It's also coming out around some of the screws, and appears to be a gasket issue. . Is this gasket a big deal to replace? .

Does this look like anything that belongs to a 1994 V4? While I was working on my thermostats on my 1994 Johnson 90hp v4, I came across this on the ground right below the motor where I was working. To me it looks like an electrical connector of some sort. .

I've read threads where ones say the V4's are prone to rings breaking - catching on the cylinder walls where there's openings. . Is there anything I can do to minimize that happening? Like an additive like yamalube or mixing a stronger oil to fuel ratio, or....?

I'm sorry I'm just asking this right out. I did do a Search, and I think I have it. Short and Simple: If I have my Battery Switch on ALL, can I switch to 1 from ALL, or from ALL to 2, and never lose power to all my stuff? Can I switch it from or to 1, 2, or ALL and not lose power to my...