1980 johnson outboard have to keep choke open

I got a 1980 johnson outboard runs and starts good but after a while i gatta keep the choke open or it stalls, Any one have an idea as to whats wrong?

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

It might help to know which 1980 Johnson. They made quite a few.

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

It says seahorse on it, I'm new to boating

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

You need to post the model number, it will tell exactly what engine you have.

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

I wrote it down somwere but can't find it, boat is at the lake. an i'm in the city.

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

what hp is it?

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

25 hp

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

Same thing when I first got my 25hp Johnson. Choke had to be partially out.

The jets were partially clogged. I added a pretty good dose of SeaFoam. Every time out the choke needed to be open less and less. Now, no choke after start, let it warm up a minute, and go!

SeaFoam Is Not a fix all. Carbs may need to be disassembled and cleaned for it to run right. Just saying it work well in this case. Can't hurt to try.

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

Like the last post said. The idle jets are clogged. This is a medium to major issue for any motor. If the jets have varnish restriction then you are running lean. Which over time will ruin you motor. Time for a can of carb cleaner and a carb kit. Total cost anywhere from $25 to 75$.

After you are done it will run like a new motor.

Hint. Before playing with any idle screws. Mark the position on the carb body to the flat on the screw. Then screw them in and count the turns. That way when you put everything back together you can set it back to where it was. The reason for the mark is the varnish will give you a false reading when going in. But when youcome out you can set it back to the factory settings. Just a hint.

Re: help 1980 johnson outboard

Re: help 1980 johnson outboard

thnx to every one that replyed well try carb kit. Thnx again