9.9 Johnson

[cholliday81]

Hello I have a 9.9 Johnson outboard, not sure what year got it when my father passed away and he loved spray paint!! The engine runs good but once warm, if you shut it off or it dies it will not start until it cools off. If you have any ideas please let me know. Thanks

 

[bktheking]

Re: 9.9 Johnson

Is it pumping water? What year? 1 of 2 things happen, you get it hot enough it will shutdown and start after it's cooled. Or ignition components get hot and you lose spark.

 

[bktheking]

Re: 9.9 Johnson

Oh ya and "have you checked compression"?

 

[cholliday81]

Re: 9.9 Johnson

Thanks for the reply. No I havent checked the compression. The motor runs great, I have it on a 12 ft john boat and it pushes it really good, doesnt miss or anything. It pumps a straight stream of water. It will run until you cut it off, or out of the blue moon when idling it may stall. When it stalls or you cut it off, It doesnt want to crank until it has cooled for a bit, not all the way cold but will not start completely warmed up. Now I dont have any paperwork for it, no tellin what my father did with it. I did see a picture of a 9.9 Johnson on here that was a 1988 and it looks just like mine, so maybe around that year. With it runningso strong could it really be something with the compression? I guess I need to check that and my spark? Thanks again for your reply, hope to hear from you again.

p.s. It looks just like the picture you have on here!!!! I guess thats the picture I saw.

 

[bktheking]

Re: 9.9 Johnson

Could be, extra long shaft is the bottom Johnson 9.9, it's a 1983 model, a little modified as it started life as a short shaft, now has an 88 powerhead as well, was it a cowl off pic?

 

[bktheking]

Re: 9.9 Johnson

Straight stream of water means squat in terms of overheating. Means the pump is pumping and that's it, the telltale source is before the thermostat, stuck thermostat as in it doesn't open is an overheating motor. If it runs as good as stated doubt compression but I'd check it just to rule it out. May also have a weak fuel pump, A- Overheating, B-Spark,C-Fuel. I did the thermostat on my 15 tonight as it was broken- took temp reading, warmest spot was 138F.

 

[Rick.]

Re: 9.9 Johnson

Post the model number and then we will know what type of ignition etc. it has. Found on the port side of the mounting bracket. Best of luck. Rick.

 

[cholliday81]

Re: 9.9 Johnson

Ok thanks Rick, I will get the numbers and get back with you. I wont get a chance for a day or so, I am working 16 hour days this week but will get them ASAP. Thanks again for helping me figure this thing out.

Oh yeah it does look just like the bottom pic on here.

 

[cholliday81]

Re: 9.9 Johnson

Alright guys I got a chance to go out there and get the numbers, maybe this will help.
MODEL# 10R77A
SERIAL# E4630435

Hope to hear back from you guys. Thanks for the help.

 

[bktheking]

Re: 9.9 Johnson

It's a 77, so it was first year of the CD ignition. How do the coils look, look for cracks. Get yourself a spark tester, when it cuts out, check for spark right then and there. The other issue is temp, you need to know if its cooling properly.

 

[Rick.]

Re: 9.9 Johnson

If you don't have a digital temp. gun try putting your hand on top of the head after it has run for a while. I should be hot but you should be able to hold your hand there for a 5 second duration without suffering. I agree with the test for spark as soon as it shuts down on you. They all look the same more or less so very hard to guesstimate the year from a picture. One thing for sure they are great engines. Let us know. Rick.

 

[cholliday81]

Re: 9.9 Johnson

Ok I will check these things out. Thanks for the info, as soon as I check this I will get back with you. One more question just so I know for sure, what is the gas mixture? I just want to make sure I have it right. Thanks again guys.

 

[bktheking]

Re: 9.9 Johnson

50:1

 

[cholliday81]

Re: 9.9 Johnson

Ok thanks thats what I thought, just wanted to make sure. will be back after I mess with it.

 

[cholliday81]

Re: 9.9 Johnson

Alright guys I got a chance to mess with it. Now this motor has been sitting up for a few years since I lived in another state and my father was sick. Anyway I pulled the carb apart and cleaned it, changed the fuel lines and filters. The coils look good to me no cracks. Now I cranked it up and it ran great, after letting it warm up I cut it off. When I tried to restart it it wouldn't start. I checked my spark and had it. However I put it in gear and pulled on it, it started. ?????? I cant remember if I ever tried that before. As far as the water, I can hold my hand on the engine for more than 5 seconds, its hot but not enough to burn. It spits plenty of water, and the little line coming out just under the rear of the cowl has a strong stream. I am going to buy a digital temp gun to make sure. If you have any ideas why this thing wont crank in neutral please let me know.

 

[Rick.]

Re: 9.9 Johnson

The only thing I can think of is the slow speed needle adjustment. Did you set it correctly? I know mine will start in gear as long as I give them very little throttle. Too much throttle and the recoil locks up as per design. Glad to hear it started in any case (gear). Rick.

 

[cholliday81]

Re: 9.9 Johnson

Yeah I'm glad she fired up too. I'm pretty sure I did it correctly, I am pretty good with carbs. It just puzzled me because when I first cranked it it was in neutral. It started fine in neutral when it was cold, had to choke it of course. Its no big deal I guess I will just have to start it that way when warm. Where can I get one of those digital temp gun? Another question where is the thermostat on this thing? Thanks for your help

 

[Rick.]

Re: 9.9 Johnson

They moved them at one point. Mine are at the back of the head. Never did post your year did you? Let me know what year you have or you can look here. Rick.

http://epc.brp.com/SiteMods/BRP_Public/BRP_Public_Login.aspx?ReturnUrl=/Index.aspx

 

[cholliday81]

Re: 9.9 Johnson

Rick I posted my model and serial #'s on here and I was told it was a 1977. You can scroll through my messages and check it if you want. I think I need to buy a new squeeze bulb from my tank, I cant get it to prime up unless I put the tank above the engine, I guess gravity feed it. I have the motor in a barrel right now and the tank on a shelf. Does that sound like what it could be? Thanks alot for your help.

 

[Rick.]

Re: 9.9 Johnson

There are little check valves in the bulb that only allow the gas to flow in one direction. If you cant get it to pressure up I would guess the valve(s) won't hold. Get a new one. I did see you have a 77 right after I posted. Are you clear on where your stat. is located after looking at that site? Rick.