BoatBanter.com

BoatBanter.com (https://www.boatbanter.com/)
-   General (https://www.boatbanter.com/general/)
-   -   How to wire in a TACH on 73 johnson v4? (https://www.boatbanter.com/general/4580-how-wire-tach-73-johnson-v4.html)

[email protected] May 16th 04 07:25 PM

How to wire in a TACH on 73 johnson v4?
 
Anyone know where to hook up a tachometer on a 73 Johnson v4 115?

I want to see where we are at. Make sure we are not over/under
propped. Also if anyone knows what RPM it should be at WOT would be
great also. What RPM planed out should one get the best Fuel miliage
out of it? I am guessing 3500 rpm. But being as how this is a barge it
never truly planes out I dont guess.

Thanks


IBNFSHN May 16th 04 09:19 PM

How to wire in a TACH on 73 johnson v4?
 
Gray lead in your wiring harness. If it has never been used, its probably
taped off somewhere. The gray lead goes through the harness and connects to
the yellow/gray lead from the stator.

--
Bill
Chesapeake, Va


wrote in message
...
Anyone know where to hook up a tachometer on a 73 Johnson v4 115?

I want to see where we are at. Make sure we are not over/under
propped. Also if anyone knows what RPM it should be at WOT would be
great also. What RPM planed out should one get the best Fuel miliage
out of it? I am guessing 3500 rpm. But being as how this is a barge it
never truly planes out I dont guess.

Thanks




trainfan1 May 17th 04 01:57 AM

How to wire in a TACH on 73 johnson v4?
 
wrote:

Anyone know where to hook up a tachometer on a 73 Johnson v4 115?

I want to see where we are at. Make sure we are not over/under
propped. Also if anyone knows what RPM it should be at WOT would be
great also. What RPM planed out should one get the best Fuel miliage
out of it? I am guessing 3500 rpm. But being as how this is a barge it
never truly planes out I dont guess.

Thanks


The loose gray wire in your remote is the tach pulse lead.

The 1973 115 is rated at 5000 rpm, and even on a pontoon/barge you
should turn this at wide open for best economy, driveability, &
longevity. It will probably require a 15" pitch prop, though. It is
hard to say what speed is the best... most likely at idle to 1000 rpm,
and then all downhill from there.

Rob


All times are GMT +1. The time now is 05:18 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 BoatBanter.com