Where to get new ESA module?

[brianjw4]

Well I pulled the boat out today and tested the ESA module. I was having problems last summer with shifting, and low and behold it doesn't do anything when I move the little cam. <br /><br />Anyone know where I can get a new one? <br /><br />Thanks,<br />Brian

 

[HT32BSX115]

Re: Where to get new ESA module?

I bought mine on EBAY for about $20<br /><br /><br />It was a good deal and "New Old Stock" (NOS)<br /><br />There's usually 1 or 2 on there at any given time.<br /><br />This one appears to be used but it's only $50<br />(Ebay number 4639910875 )<br /><br />Otherwise here's a new one on EBAY #4607813674 <br /><br />Regards, <br /><br />Rick

 

[brianjw4]

Re: Where to get new ESA module?

Thanks Rick!

 

[HT32BSX115]

Re: Where to get new ESA module?

By the way check the microswitch and the associated wiring. It may be the switch or wiring.

 

[Boatin Bob]

Re: Where to get new ESA module?

Also check the other switch the overstroke, all it has is a little button with a rubber boot around it, if it's sticking it will also cause the ESA not to engage, some people have caused this to themselves by trying to adjust the switch and tighten the 2 little screws too tight which causes the inner switch to stick or bind inside. These 2 switches are actually wired in series with each other, the interupt is the one with the arm and roller is a NO switch while the overstroke is a NC switch. Here is another place to order brand new aftermarket ESA's. ESA

 

[brianjw4]

Re: Where to get new ESA module?

Oh, I thought there was only one switch. Two switches have to be switched at once for the ESA to short the coil?

 

[Boatin Bob]

Re: Where to get new ESA module?

The overstroke switch prevents the ESA from operating while your are in gear, as you are pulling it out of gear into neutral the cam moves off the overstroke switch causing it to close again and the v shape arm moves and closes the interupt switch so both switches are closed at this time which activates the ESA, the engine stumbles, you complete the shift into neutral, the v shape notch returns to normal (in the middle)the interupt switch opens, the ESA deactivates, RPMS go back up and you are done, keep in mind this all happens in a couple of seconds. So either switch not working as designed will cause the ESA not to work as well as bad connections and missing power to the ESA module itself.

 

[bandsaw48]

Re: Where to get new ESA module?

Also check the ESA ground wire to the block, if it doesn't have good ground, it will not function. A bad condenser will also prevent it from working which I found out the long and hard way after replacing the ESA.

 

[KaGee]

Re: Where to get new ESA module?

Rapair has a replacement now. Mine was less than $70 last year.

 

[brianjw4]

Re: Where to get new ESA module?

Well after reading this information, I definitely didn't do the test properly. I only flipped the overstroke switch.

 

[brianjw4]

Re: Where to get new ESA module?

So I went and looked at the switches again, and when the throttle is moved to forward gear (idle), the interupt switch is depressed and the overstroke switch is not depressed. Is that right? Do both switches have to be depressed for the ESA to short the coil?<br /><br />When I put it in reverse gear (idle), the overstroke switch is depressed and the interupt is not.

 

[Boatin Bob]

Re: Where to get new ESA module?

Not sure how you are doing this test, boat in the water engine running? NO you don't want both switches depressed only the interupt one (has lever) the overstroke (little button popped out)should not be depressed or that will open the circuit. Both of these switches go to a 4 pin plug attached to the ESA, best thing to do is use a multimeter and check each switch for correct operation manually.

 

[KaGee]

Re: Where to get new ESA module?

To test just push the interrupt. Thats all.

 

[rybad]

Re: Where to get new ESA module?

You can get the module from www.ebasicpower.com

 

[bandsaw48]

Re: Where to get new ESA module?

Hey Brian, is this OMC or Mercruiser? You sound a lot like I did a few weeks ago before guru Don S. straightened me out on how the thing works. Although your ESA may not be operating properly, it only affects getting the thing OUT of gear. If you have problems shifting INTO gear, you may have a shift cable problem. Back to the ESA (OMC), the connector has two black and two purple wires. One pair is the interrupt and the other the overstroke. Trace them back to the switches, the interrupt(lever switch in V-block) should be normally open, put the ohm meter on those wires and depress the lever, should ring closed. If doesn't, you have a bad switch. If it does, clean the ESA ground and replace the condensor. Still no dice... then you have a dead ESA.<br /><br />Good luck

 

[Boatin Bob]

Re: Where to get new ESA module?

bandsaw48...you are not giving him the complete story, the overstroke switch being open will also cause the ESA not to work so until he does check correct operation of both switches and connections and input power to the ESA it may be premature to advise the ESA is shot.

 

[brianjw4]

Re: Where to get new ESA module?

Thanks guys for the information, unfortunately I don't have an OHM meter, but I can pick one up. When you say the switch is open, I assume you mean depressed?<br /><br />It could easily be a ground issue to, I just have to dig into it.

 

[bandsaw48]

Re: Where to get new ESA module?

Your absolutely right Bob, sorry for the omission.<br /><br />Brian, normally open (NO) means the switch will not conduct electricity until the lever is depressed, normally closed (NC) means the switch conducts until depressed which opens the circuit. See "Boatin Bobs" first post.

 

[Boatin Bob]

Re: Where to get new ESA module?

Brian...about the switch question, hopefully I don't confuse you more. NO = normally open, NC = normally closed. Most of the little microswitches will have 3 wires, pins, leads. Usually on the side of the switch you will see C, NC, NO, the C stands for common. In the case of the interupt switch the wires will be attached to the C and NO, this means when the switch is in it's normal position it is open and to close it you must depress it. For the overstroke it will be the opposite, the wires will be attached to the C and the NC so it will be normally closed and opens when you depress it. Any cheap multimeter set on the x1 ohms scale will work to test these switches.