Identify this part

[trita306]

72 Johnson 9.5 Model: 9R-72M
This piece is currently being held together with a paper clip.. Can someone identify the replacement pin and provide a part number for me please. Ive looked at every diagram and cant seem to find it.

This is where the throttle adjustment comes into the upper unit.

 

[racerone]

Re: Identify this part

Do not see a pin listed either.----Use a suitable ( loose ftting ) small bolt and nut.-----Before you start spending money on this motor you should do some checks.-----Suggest you do a compression test.-Follow that with a test to see if spark will jump a gap of 5/16" or more.-----Reporting that you have " good spark " is not good enuff to make sure motor will run properly.

 

[HighTrim]

Re: Identify this part

Also ensure there are no exhaust leaks, and the mounts are sound. When they go, they rattle the ignition off.

I think I still have a 9.5hp on the test stand, I can take a pic of the setup.

 

[oldboat1]

Re: Identify this part

trita306 -- welcome back. I'm recalling you had the motor running, but had a cooling/water circulation issue or question. If the motor is up and running, is it overheating (e.g., can't hold the side of your hand on the top of the head for a few seconds)? What's the operation like -- seems to run smoothly? (may be forgetting where you were on the 9.9 thread)

 

[the machinist]

Re: Identify this part

I just went out & looked at one that I am doing some gearbox work on for a neighbor. His has just a roll-pin there.

 

[trita306]

Re: Identify this part

I cleaned out the lines and tank and put fresh gas/oil and it started right up. It had good exhaust and impeller seemed to be working well.

However, it did seem to not hold and idle and have missing issues in idle. With a little gas it worked great, the issue is only in idle. I am not experienced in marine motors but I am quite handy and can do most things myself. I can post a video if that helps. I tried to let it warm up and work out anything old but it didnt seem to change.

 

[HighTrim]

Re: Identify this part

I would like to say that this can be an easy problem to chase but I would be lying.

We did one where swapping the top half of the carb was the only solution. They can intake air, causing them to run lean from a number of locations. Hopefully your casting is not to blame, good luck tracking that down!

Fuel lines, throttle shaft, welch plugs, etc are all examples of typical air intrusion locations. I would assume you cleaned the carb and rebuilt to start. Was the cup behind the large welch plug? Is the plug sealed? Will partially choking or holding your hand over the intake smooth out the sneezing?

 

[racerone]

Re: Identify this part

Do a test on spark intensity.-This motor will likely have 2 cracked coils or 2 new ones already.

 

[oldboat1]

Re: Identify this part

see Racerone is back to posting on your old thread -- appears there is a tell-tale of sorts (reference to a tube under the block). Did you get a prop? I'm not sure it's good to operate the motor without one, but others can address that. Maybe makes no difference, at least at idle. I would be encouraged, I think, with what you've found so far.

 

[HighTrim]

Re: Identify this part

Forgot to add another issue may be a clogged crank drain.

 

[trita306]

Re: Identify this part

I found that I put a little chip in the fuel line adapter female plug on the gas tank when I was trying to drain the line of old gas. I figured that out when it was leaking on the ground when held lower than the tank. I'll start with fixing that and take a video and go from there.

Seeing that this project is salvageable I ordered all the necessary parts to get this thing sea worthy including prop, prop nut, cotter pin, drive pin.

I also did locate the rubber hose that the water outputs from and it was working well compared to the videos I saw on youtube of this motor running perfectly.

 

[trita306]

Re: Identify this part

Lets start with the most simple/cost efficient fixes, and work our way up to the more expensive/difficult fixes. Can you organize that list accordingly?

 

[oldboat1]

Re: Identify this part

well said. sounds like you are on top of it, and the fuel line adapter fix might work a little miracle. I'm not sure if your model has the inspection cover on top of the flywheel (probably not). If it's there, however, you can at least check out the physical condition of the coils (and points.)

 

[HighTrim]

Re: Identify this part

You need to start with some basic testing.

Step 1 is always test compression. These are not high compression motors so don't expect huge numbers.

Step 2 is test spark. As mentioned, if coils are original, they are junk and will fail. Spark should jump a 1/4" gap with ease with a bright blue zap!! Even if the coils spark, and are cracked, they will fail on the water. Change them.

If the motor is new to you, and age of impeller is unknown, change it.

Change the gear oil and crush washers.

If fuel line is old, change it.

Inspect gasket for fuel pump. If old and cracked, change it.

The 9.5hp carbs are very easy to take off and rebuild. Do this.

 

[oldboat1]

Re: Identify this part

try it in a test tank with the new prop you've already ordered, and the fuel leak fixed. You can test shift operation then too, and with the back pressure will get some hints in overall troubleshooting. I agree with everything High Trim included, but it's a matter of timing (yours, not necessarily the motor's).

 

[trita306]

Re: Identify this part

Awesome, thanks for the guidance. I will get cracking and report back with my progress.

 

[trita306]

Re: Identify this part

Would a kit like this work well for testing this motor and have everything I will need?
8 Piece Automotive Compression Test Kit

 

[geoffwga1]

Re: Identify this part

Yes,use one myself all the time.Just make sure it's screwed in to the plug hole hand tight only but securely and give at least 5 good pulls.
Geoff69a1.