what year johnson to i have?

[waynefishid1]

I have a johnson 50 VRO<br />MOD no. BJ50belcud<br />Serial no. G 7432733<br />Made USA<br />What year is it?<br />Ive not long had it and ive just test run the engine for the first time.<br />Runs OK.<br />I experienced smoke coming through the holes in the top of the fly wheel!!! This was without the key even in the on position! What happened to my Bat. charger device thing that i have been told runs off of the fly wheel!! And WHY???? I think its burnt out. How can i tell if its still working. This engine has been well serviced in the past but has been stood covered for quite some time. ANY help appreciated!

 

[rolmops]

Re: what year johnson to i have?

Hello.<br />1987

 

[waynefishid1]

Re: what year johnson to i have?

Cheers, i thought it was 80 something. What do you mean by make sure the plug is in? In what. Im not too much of a thick gimp but could you/someone explain!??!

 

[rickdb1boat]

Re: what year johnson to i have?

Drain plug in the transom. That's just Rolmops signiture, but good advice.

 

[waynefishid1]

Re: what year johnson to i have?

Cheers ! Ive got more to go on now. Would this cause burning then? How?

 

[waynefishid1]

Re: what year johnson to i have?

Could a grounded rectifier lead or stator lead cause my windings on generator to burn out???

 

[waynefishid1]

Re: what year johnson to i have?

Im greatfull if someone could give me some ideas where to start checking, (stator or rectifier leads?)

 

[ezeke]

Re: what year johnson to i have?

OK, I'll give it a shot, but remember that I've never even seen your motor. <br /><br />You can cook a rectifier in a second by reversing the battery cables, by disconnecting the cables while the motor is running, by running on a weak battery, or by having loose connections on the battery cables. If it fries, the current can then close the circuit to the stator and that too can be fried. Hopefully you disconnected when you saw the smoke and the stator will be ok. <br /><br />You can order a new rectifier here: ORDER RECTIFIER , or pick one up at your dealer. <br /><br />If you want to check the rectifier first, go to "Search Forums" at the upper right corner of this page and look for JoeReeves recent post on the subject.

 

[ezeke]

Re: what year johnson to i have?

Well, might as well save you the trouble of searching:<br /><br />Joe Reeves <br />OMC Guru <br />Member # 6826 <br /><br /> posted September 13, 2003 11:10 PM <br />--------------------------------------------------------------------------------<br />Ron..... Only replace a rectifier if it's faulty. If it's a water cooled regulator/rectifier type, you'll need a manual to check it. If it's the small three (3) wire type, the following procedure would be the one to use.<br /><br />(Small Rectifier Test)<br /><br />Remove the rectifier wires from the terminal block. Using a ohm meter, connect the black lead of the ohm meter to the rectifier base (ground), then one by one, connect the red lead of the ohm meter to the yellow, yellow/gray, then the red wire (some rectifiers may also have a yellow/blue wire. If so connect to that also). Now, reverse the ohm meter leads and check those same wires again. You should get a reading in one direction, and none at all in the other direction. <br /><br />Now, connect the black lead of the ohm meter to the red wire. One by one, connect the red lead of the ohm meter to the yellow, yellow/gray, and if present, the yellow/blue wire. Then reverse the leads, checking the wires again. Once more, you should get a reading in one direction and none in the other. <br /><br />Note that the reading obtained from the red rectifier wire will be lower then what is obtained from the other wires. <br /><br />Any deviation from the "Reading", "No Reading" as above indicates a faulty rectifier.<br /><br />--------------------<br />Joe (30+ Years With OMC)<br /><br />--------------------------------------------------------------------------------<br />Posts: 1597 | From: Central West Florida | Registered: Feb 2002 | IP: Logged

 

[ezeke]

Re: what year johnson to i have?

Few last thoughts and I'm off until Wednesday - <br /><br />You can get the stator coil from the same source that I bookmarked for the $36. rectifier - $20.00 US. Feel good - the stator for my motor is $308.00!<br /><br />Read Joe Reeves' "Rectifier Test" carefully and you will see what to do with the fourth wire.<br /> <br />Also, learn to use the "Search Forums" on this web page. There is a invaluable resource here for those with the desire to use it.<br /><br />Good Luck!

 

[waynefishid1]

Re: what year johnson to i have?

Thanks for your help (ezeke?) i thought that doing this test might tell me if faulty ill give it a go. You said that loose bat terminals can sometimes be a reason for the frying. Well i connected the battery terminals and could hear the charge inside the flywheel and the positive lead sparked fairish when connecting. So you recon if i test stuff i could just replace whats faulty?

 

[ezeke]

Re: what year johnson to i have?

Disconnect and tape all the rectifier leads after making a wiring chart. If the motor runs without it, just replace the rectifier.

 

[waynefishid1]

Re: what year johnson to i have?

The motor still runs even after all the smoking business from the stator coil, but am i right in thinking that the stator windings could still be nackered?<br /><br />Also what i don't understand is why it fried when i connected the battery cos the ignition key was not on!!! And if this is gonna happen every time i connect a battery its gonna cost me a small fortune isn't it?

 

[ezeke]

Re: what year johnson to i have?

I'll try to help, but someone else feel free to jump in here.<br /><br />The purpose of the rectifier is to get current from the stator and convert it to direct current. Nothing goes back the other way.<br /><br />When the rectifier goes, the wiring can short within it. If it does, the current from your battery can go back through the bad rectifier when you connect the battery. This can damage or destroy the sensor. <br /><br />The rectifier can go bad without having this happen, but too often, it does.<br /><br />I don't think you can damage the rectifier by connecting or disconnecting the battery if the motor is NOT running, unless you reverse the battery leads or the rectifier is incorrectly wired.<br /><br /> <br /><br />It is while the motor is running that most damage occurs.

 

[ezeke]

Re: what year johnson to i have?

One more thought: The best thing is to have a battery switch on the positive line off the battery. You can then connect your cables for the season and just turn the switch when you want to run. A good marine switch is not that much money when you consider what you are going through now.