Check parts diagrams for both. Reeds and exhaust may differ.

If this just worked on all johnsons.

Very informative video. Keep up the good work!

what fuel mixture for this engine is 1:100 or 1:50

I had a late 70's 9.9 that I changed to a 15 and in addition to a different carb, there was also a spacer that allowed the reed valves to open more. It was a great running motor until I let a friend drive the boat. He made a sharp turn at high speed and the motor tore off of the transom and went to the bottom of the creek. It's still there if anybody wants it!

What does the knob on the handle , I try to play with mine but don't see waht it does?? Thanks, and good video

This is really relaxing to watch. Looking forward to the next video ❤

Really like the pace of the video, great description of the issues too

Enjoyed this 1st episode of the Generator revival and looking to next episode when you rebuild the motor.

I have the same but slilghty smaller gen set 7500 starting and 6500 running eleectric start great little unit 👊

Great video. I have subbed to the Giant Crescent Wrench channel :P

i have a 1998 johnson 9.9 and 15hp models. Both vary low hour motors. they both will idle down to almost nothing. the 15 screams top end but seems to stumble mid range were the 9.9 remains smooth. i think the cylinder porting are different between the two. maybe thats why i only see 9.9's on sailboats

Did you swap out the prop as well to account for the extra horsepower? I’m thinking that a 33% increase in horsepower would require more pitch at the same RPM.

You have also change to the turned exhaust tube that 15hp has. If you put more gas in you have to gas more exhaust out also to be 15hp

👍🏾👍🏾👍🏾👍🏾👍🏾

That's about right. My Evenrude went from 9.9 hp 30 kph 15 hp 35 kph. My 15hp Nissan goes 40 kph

Easiest way to take off the carb is to take off the fuel tank and covers. Easiest way I've found. I had the same trouble with my 2005 vinson. It wouldn't idle and mine turned out to be the o-ring on the air fuel screw. It had dried out and wasn't sealing. Be careful not to lose the washer behind it as the screw will tear the hell out of the o-ring. For my vinson the magic number for the air fuel screw is about 2.5 turns out from bottom. Pretty simple little carb, but can make you mad as hell too.

Where did you find a carb I have same year motor I’d love to do the swap but can’t find a carb

what type alternator bracket and alternator did you ues

Best tear down video I've seen...thanks...slow and methodical and named every part.

i was told you can do the same with a mercury .

It aint got no gas in it ?

Is the river deep enough at any spot for a 16' aluminum bass boat?

My 2008 90 does the same thing. Checked everything. Going to try to fit this in. Great idea. Thanks for the video.

Shame you didn't show the rebuild. Ie float adjustment. Idle. Etc.

Well done sir. Seriously

Kinda surprised me how well that thing moves for such a small motor

Ill it troll as nice with the larger carburetor?

That's one way to make your johnson bigger😊

What's next? Cut the cylinder to set squish and some porting? 😂

I would love to have this motor. These gems are tough to come by.

Thanks so much. This video inspired me to pull the carb. Took it to a friend who has a carb bath. Runs like new!

Please help /. Where does the long hose go. About min 3:04. You can see it clearly.

Yeah!! A build video

That bottom screw you turned out 1 or 1 & half. Is that the fuel mixture ?

I got a sonic cleaner & boy do they work good

Good video

At least give credit to sixtyfiveford for giving you the idea. He did it two years ago, and did it better.

Hope it won't go BUZZZZZZZZZ when the timer runs out

❤so nice and useful video ❤

Looks to me like that little red knob is in the "enricher OFF" position. Which will make cold start difficult.

That's very cool!

So basically the video could’ve ended at one minute

the wiring diagram is a relic from a time when manufacturers answered to consumers, not the other way around.

BTUtiful!

Thanks for the video. Perhaps use something like napa sil-glyde or vaseline on the o-rings instead.

Good video helped me with my idle issue.. Only suggestion is to not use WD-40 on o-rings i. It dries them out- use Ballistol or hydraulic fliud.

Just what I have been looking for. Thanks

Sweet. Great idea.

After watching a bunch of 4L80e builds, there is some disagreement as to the 'right' way to do things. There is ONE thing that EVERY builder and parts manufacturers agree on and that is that the 4L80e is sensitive to END CLEARANCE and that this is what kills many of them. Either I missed it, or on this build, NONE of the 3 critical end clearances were set or even checked. If that is the case, then this is an example of how to build for a short life.