Mercury 75 ELPTO Questions

[bassfreaks]

I just bought a 2004 Triton 1756 sc with a mercury 75 elpto serial number 0T943305. Is there supposed to be a beep when you turn the key? Mine doesn’t beep. If not, will it beep if there’s a problem? Also, there’s two wires that come out of the motor and they are connected straight to the positive and negative on the starting battery. Should it be like that or should it be hooked to a breaker?

[SilverFox579]

Can't answer your first question except to say I think it should, as to the second, are the two wires from the engine the + & - cables or something else?

[bassfreaks]

Yes they are the + and - cables coming out of the motor. They were hooked directly to the battery, no fuse or breaker. Didn’t know if it should be that way?

[EuropeanAM]

The battery cables do indeed connect directly to the battery.

This engine series does not have a "test beep", but should sound a warning horn for overheat or low oil level.

The horn can be tested by providing a GROUND to the tan w/blue stripe wire (inside the cowling) with the key on.

[bassfreaks]

Thanks! I currently have no gauges either. What all would be involved installing a tachometer? Does it just plug in somewhere?

[EuropeanAM]

Engine wiring harness should have a connector that permits a Instrument Harness to be installed (that harness has the pertinent circuits for most traditional analog gauges).

Which harness depends on which control and harness is in your boat (and whether or not the instrument harness plug can be located). A picture of the keyswitch harness (under dash) or the control (if key is mounted in the control) is helpful.

[bassfreaks]

Here’s some pictures! Would this be the plug?

[EuropeanAM]

Appears to be... can't see the wire colors or the inside of the plug, but I believe that's what you're looking for.

Should be able to get you a plug-in harness for that connector (Sherm @ Sherm's Marine or we can assist through the Parts Departments).

[bassfreaks]

I took it out for the first time yesterday. When I tried the fast idle lever it doesn’t seem to be doing anything. It also seems to be idling high when in neutral. I was also having problems getting it into neutral, it wouldn’t lock in place. I took the lever off today and found a broken plastic piece that the lever locks into when in neutral. Is this a part that I could order?

[JOE54]

yes

[bassfreaks]

Anybody know the part number?

[EuropeanAM]

16899T is the "HOLDER- Neutral Lock".

Looks like the control handle was forced out of neutral (or through neutral), breaking the Holder.

Harness you need would be Part# 86396A8 (4') or 86396A24 (13')... Tach harness plugs into the connector you showed earlier on in your post.

[bassfreaks]

Thank you!

[bassfreaks]

Is there a certain tachometer that I need to buy? I ordered one but just realized it only reads to 5k. It says 5250 max rpm on motor. Is there a smaller size tach that will work, instead of the 3” size?

[JOE54]

not that in know of you need a 6k tach

[mikeno]

If you’re going to open up the remote to replace the neutral lock I’ve got some suggestions based on my experience with them: 1) take photos as you disassemble 2) replace the neutral safety switch #17277T as they fail frequently. 3) Clean with Gunk or similar and grease throttle and shift rods and other wear points.

[EuropeanAM]

Believe that particular part is on the outside of the control box.

[bassfreaks]

Thanks

[JOE54]

Believe that particular part is on the outside of the control box.

+1