90 HP Johnson problem

[juniorboi]

Ok...so my battery died and I had to remove it to charge it. But when I put it back, Like a idiot -I put it in backwards. I dunno why, just got the wires mixed but...the reason I knew it was backwards was because the stereo wouldnt work. So I put the battery in the right way. The engine started right up but the tach dosent work now and also it seemed like the boat was running rough. Can anyone tell me what problems I might have and what I should be checking when you reverse the leads on a battery? Also any advice on repairing my Tach would be greatly appreciated.Thanks!!

 

[ezmobee]

Re: 90 HP Johnson problem

You fried your rectifier. Your charging system is not currently working.

 

[Big Pete]

Re: 90 HP Johnson problem

You fried your rectifier. Your charging system is not currently working.

You can fry the rectifier that easy ? and that stops the tacho working as well ?

 

[ezmobee]

Re: 90 HP Johnson problem

Yes and yes.

 

[juniorboi]

Re: 90 HP Johnson problem

Is there anything else that may be affected? Thanks.

 

[reeldutch]

Re: 90 HP Johnson problem

if you keep on running it you might damage your stator and powerpack.
totaly agree wit ezmobee

 

[ezmobee]

Re: 90 HP Johnson problem

I believe the rectifier isn't a terribly expensive or difficult part to replace.

 

[Big Pete]

Re: 90 HP Johnson problem

I just brought one today and it cost me ? 50 about 75 of your US Dollars i think..?

 

[reeldutch]

Re: 90 HP Johnson problem

some are watercooled and might require a gasket
its not hard at all
if its a ois you might have to unplug some stuff on top of the motor.
my 150 is like that.
keep running a damage rectifier is actualy a fire hazard.

 

[bktheking]

Re: 90 HP Johnson problem

I had this go on my 90, it's an 83 with the 3 wire. I went to an electronics store and picked up a $7.00 30 amp rectifier , cut the leads off the old one, crimped on some leads and used the existing mounts to mount it up. Good as new.

Unless you wanna buy the fancy $60 unit, totally up to you, I'm cheap

 

[bktheking]

Re: 90 HP Johnson problem

Mine isn't water cooled so I could go this route, it was the simpler pre water cooled design that just bolted to the powerhead. Other people have done this replacement on OMC and Merc with great success.

 

[reeldutch]

Re: 90 HP Johnson problem

dont know theres different 90 out there even e-tecs fights you name it. even a four stroke with johnson on it

 

[Big Pete]

Re: 90 HP Johnson problem

Yep but this is a proper one ,, and its Made in USA

 

[bktheking]

Re: 90 HP Johnson problem

Components from Taiwan, don't kid yourself, assembled in the USA.