Home › Forum › Ask A Member › 1921 Elto Lightwin Model F
- This topic has 32 replies, 9 voices, and was last updated 1 month, 2 weeks ago by
Aidan Smith.
-
AuthorPosts
-
January 12, 2026 at 11:58 am #303295
Tubs,
I had deep cleaned the entire motor piece by piece, and unfortunately, very little of the original copper plating was still intact. It had mostly worn down to the steel, and was dirty. I figured that roughly scuffing the surface then painting was the best course of action. My next step is to disassemble again to replace all gaskets, and polish the whole motor.
"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin F
1950 Mercury KF-7
1951 Mercury KG-7
1959 Mercury Mark 6AJanuary 12, 2026 at 10:37 pm #303329.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
1 user thanked author for this post.
January 18, 2026 at 12:10 am #303531All Model F’s deserve to be restored. More photos would be helpful so we can see exactly what you have and what needs to be replaced. The 1921 and 1922 ELTO’s share most parts so returning your motor back to service isn’t an impossible task. If you can separate the cylinders from the crank then you stand a good chance of getting the seized pistons out. I have also had some luck with lightly stuck motors freeing up after some days or weeks in Evaporust. However, heat and oil is always the best place to start.
Wayne
Upper Canada Chapteruccaomci.com
1 user thanked author for this post.
January 18, 2026 at 12:11 pm #303537

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
1 user thanked author for this post.
January 18, 2026 at 8:08 pm #303555Tubs,
I have a complete serial number tag, as mine is F1745 right on the tank. I believe I will go with a donor powerhead from another motor, I cannot seem to find any sort of serial number anywhere on the body of the motor, just on the tank itself. Would you know where to find one if it had another?
"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin F
1950 Mercury KF-7
1951 Mercury KG-7
1959 Mercury Mark 6AJanuary 18, 2026 at 9:45 pm #303565The only location for the serial number is the tag on the tank. As already mentioned, your tag doesn’t match the tank or vice versa. This is why more photos are necessary. Motors this old often have parts interchanged. 1921-22 have very few differences. The 1923 model A shares most parts, but differs in some key ways from the model F. I’d like to see the carb, timer, transom bracket, transom pads and exhaust cut out. Those are the key parts to identifying what you have and what you need to make the motor correct.
Wayne
Upper Canada Chapteruccaomci.com
1 user thanked author for this post.
January 18, 2026 at 10:24 pm #303576
I miss understood the issue with your tag. After reading Wbaton response, he seems to be very knowledgeable when it comes to your motor. Its important to provide him with all the information he is requesting. Then he can tell you what you actually have so you can make the best decision on how proceed.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
January 19, 2026 at 7:44 pm #303595As you folks have mentioned… here are some more photos. Best I could get for right now, there are 4 green top Mercs that have been wedged in, blocking my full access to it.
"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin F
1950 Mercury KF-7
1951 Mercury KG-7
1959 Mercury Mark 6AJanuary 19, 2026 at 7:45 pm #303597Not sure what happened to the other 2 photos, but here are all of them.
"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin F
1950 Mercury KF-7
1951 Mercury KG-7
1959 Mercury Mark 6AJanuary 20, 2026 at 8:35 am #303610I only see one photo. There should be an option to “insert into content” yhid will insert the photo into the body of the post. That’s the option I choose.
Everything in the photo you posted is correct for the F. It has the model F specific carb so I’m convinced this is likely an F wearing a 1922-23 fuel tank. The exhaust cut off on the side of the motor should look like a “peanut”. The timer should have wires out the front, but they were often changed to the newer style with the plug capped and the wires routed out the back. Photos below show examples.
So in short, you need a powerhead from a 1921 model F, 1922 (no letter designation) or 1923 model A. Lots of options. However, I would still try to free up the powerhead. You would be surprised how often they can be saved. It’s also easier to find a few parts than an entire powerhead. Good luck with your project.
Wayne
Upper Canada Chapteruccaomci.com
1 user thanked author for this post.
-
AuthorPosts
- You must be logged in to reply to this topic.


