1976 200hp Johnson

[eula30]

Hi there, any ideas on why this motor 1976 200hp Johnson is leaking oil thru the mid section, every time I start up the Motor oil will come out thru the outside top part of the midsection, even if I run the motor for 2 minutes oil will come out. Is that because I have a faulty gasket between the midsection and the power head. Motor runs fine, Any Idea I will really appreciated.<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

I can't remember for sure, but there may be a gasket between the exhaust adaptor and mid-section....even with no gasket, it "could" leak there.<br />There is a gasket between powerhead and adaptor and if that gasket is cracked or parted, it could verywell leak some exhaust through there as back-pressure could allow some flow if there was a slight gap at all.

 

[eula30]

Re: 1976 200hp Johnson

Thanks for quick reapply. Do you guys know if this can do any harm to the motor? The motor runs really well and I’m just wondering if this could do any damage to the motor.<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

I can't see that it would be harmful unless it gets worse, then maybe I would look into it further.

 

[eula30]

Re: 1976 200hp Johnson

Thank you

 

[eula30]

Re: 1976 200hp Johnson

Hi, any ideas on why this motor will tilt-up on reverse? I can reverse just fine if is slow but if I need to go fast or in ruff seas on reverse the motor will come all the way up, any ideas on why it is doing that?<br />Any help I will really appreciated.<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

sounds like maybe one of the valves are leaking back. They are simular to a shuttle valve.<br />If a seal kit has never been installed on that 1976, it may be time to do so.<br />Sometimes it's just a piece of crud stuck in the system.

 

[eula30]

Re: 1976 200hp Johnson

Thanks walleyehed for all your help.<br />Thank you<br />How about the power trim why is the power trim behaving that way? Why in reverse the motor will come up? Any ideas please<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

well, that's kinda what I was getting at in the previous post....the system has pressure on both sides and it sounds like one of the valves in the system is allowing trim fluid to flow the oposite direction. Is the system full of fluid??<br />Do you have a manual to show the correct procedure to check the fluid???

 

[eula30]

Re: 1976 200hp Johnson

Hi there, I do have the manual, but I don't know how to check the fluid. If it needs fluid what king of fluid should I used? Also can I Install a seal kit my self? if so how can I order. <br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

You "can" do it yourself if you follow the manual very closely. You have to remove the trim-tilt system to do this work, so there is a bit involved in it. The manual will give specs as to what trim fluid to use and also follow the manual for checking the fluid level...it's under very high pressure...be careful.<br />As for ordering parts, there are several after-market sources available and an internet search will find quite a few if they aren't available right here at iboats.

 

[eula30]

Re: 1976 200hp Johnson

Hi walleyehed thanks for your time and all your help. <br />After reading the manual, I don't think I'm going to be able to remove the Trim tilt system but I will check for Fluid on Tuesday and hope that is the problem. I do have a question about RPM tach, I have 2 new rpm gauge, I have connected the RMP gauge to the gray wire and all I get is when I crack the motor the gauge will move up to 7000 rpm for less then a second and then will come back down to 0 and That’s it. Am I missing something? Is there any way to test the wire to see if is working? Or is there any way I can bring a wire from the motor to the RMP Tach? Please any help I will really appreciated.<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

There should be 3 wires for the tach...1 black, 1 grey and 1 purple.<br />black is ground on the tach, purple goes to B+ on the tach, which is power with the key on and the grey is the sensor wire for the tach.<br />If properly wired, the tach should "zero" when you turn key on, or to the "run" position. Make sure the grey wire goes to the sensor terminal on the tach and not the B+. Also, make sure there isn't a wire AT the sensor or the B+ terminal that shouldn't be...It soundsa like a power wire is present at the sensor terminal that shouldn't be there.

 

[eula30]

Re: 1976 200hp Johnson

Hi walleyehed, sorry I took so long motor wasn’t working, had to replace both head gasket but now I’m back on track. I also both a power tech polish SS propeller and it won’t fit either it only goes half way on the shaft. I don’t know what to do? It was sold to me for my motor. About the RPM tach I can only see 2 gray wires coming from the control, I have tried all day and I have no look with the tach. I bough a Farria with and adjustable setting on the back 2,4,6,8 cylinder knob. I will buy another tach, is there anything special on the tach that I have to look for?<br />Thank you

 

[walleyehed]

Re: 1976 200hp Johnson

First, give me that P/N of the powertech prop..<br />Buy a tach that is made for 2 stroke outboards that has the pole positions (Settings) listed on the back. Number of cylinders aren't needed, number of "poles", 4P, 5P, 6P, etc., for indicating which stator we have is what we set the tach up for.

 

[eula30]

Re: 1976 200hp Johnson

Hi there,<br />Only numbers on the prop are: 17-M, 15 1/4 X 17-M, does are the only numbers on the prop. I will be buying the tach this afternoon.<br />Thank you

 

[Dhadley]

Re: 1976 200hp Johnson

Kenny, I think he has a prop with a Merc hub. That would explain only going on half way and the "M" in the numbers.

 

[walleyehed]

Re: 1976 200hp Johnson

Yea, sounds like the M-250 series for Merc....<br />Eula30, did you buy this prop from powertech???<br />Or a dealer maybe??

 

[eula30]

Re: 1976 200hp Johnson

Hi , I got it from a outboard motor mechanic, I did double check with him and now he said it is a power tech UN200 offshore series part number: UN200OFS3R17P and he confirm that it is for mercury/ mariner v6 135hp and up outboard. I can’t retuned or exchange the prop. He doesn’t have the prop that I need. I did have a good deal on the prop, is there any way I can replace the Hub and use this prop on my motor? Or this prop it is no good to me.<br />Thank you

 

[Dhadley]

Re: 1976 200hp Johnson

It was sold to me for my motor.

Lets see...he knows what motor you have and sold you a prop accordingly. Now it turns out its for a different brand and he wont make it right. Nice guy. Makes ya wanna run right back and buy something else from him, doesnt it? Sorry to rant but that kind of stuff just ticks me off no end.<br /><br />Anyway, all you have to do is either shorten the splines or rehub it. Most good prop shops can do either. A good machine shop can shorten the splines. No big deal - we do it all the time.<br /><br />Again -- sorry to rant and steal the thread.