mudd_mickey
Seaman Apprentice
- Joined
- Mar 19, 2007
- Messages
- 39
I?m having problems with my tach and plan to troubleshoot it using the method described here.
http://forums.iboats.com/showthread.php?t=190636
(Testing Tachometer With Water Cooled Regulator/Rectifier, by Joe Reeves)
As described in the post, can I hook the gray wire to the terminal post and leave it like that all day while I run around on the boat? Will it hurt anything? The reasoning for this is my problem is not consistent and won?t occur in the driveway and typically only occurs at high rpms. I need to run this test for quite some time just to recreate the problem.
The tach was replaced less than a year ago by the previous owner so I feel it works fine. It displays fine in the driveway, at idle, and at low rpms. However, typically when I get over 4000 rpms, it drops to zero, totally dead. Sometimes it will wake up and bounce from zero to my current rpm range or come alive for a minute or two then drop back to zero. Other times it works fine. The main problem seems to occur at higher rpms and after a while of mocking me it just goes to zero and stays there. If I slow down, it comes alive and works fine. Also, at about 3500 rpms or higher if I stay there and use the electric trim/tilt, while I have the trim/tilt engaged the rpms on the gauge will drop slightly. The motor is not slowing, I don?t think the rpms actually drop, it?s just the gauge that drops.
Since there is a higher demand for power at high rpms and since the gauge will drop when I increase the power load by engaging the power trim/tilt, I feel this is a rectifier/regulator problem (mine is combined). Anyone have any comments on that?
Thanks in advance.
Mudd
1993 Johnson OceanRunner 140
Model # VJ140TXETF
http://forums.iboats.com/showthread.php?t=190636
(Testing Tachometer With Water Cooled Regulator/Rectifier, by Joe Reeves)
As described in the post, can I hook the gray wire to the terminal post and leave it like that all day while I run around on the boat? Will it hurt anything? The reasoning for this is my problem is not consistent and won?t occur in the driveway and typically only occurs at high rpms. I need to run this test for quite some time just to recreate the problem.
The tach was replaced less than a year ago by the previous owner so I feel it works fine. It displays fine in the driveway, at idle, and at low rpms. However, typically when I get over 4000 rpms, it drops to zero, totally dead. Sometimes it will wake up and bounce from zero to my current rpm range or come alive for a minute or two then drop back to zero. Other times it works fine. The main problem seems to occur at higher rpms and after a while of mocking me it just goes to zero and stays there. If I slow down, it comes alive and works fine. Also, at about 3500 rpms or higher if I stay there and use the electric trim/tilt, while I have the trim/tilt engaged the rpms on the gauge will drop slightly. The motor is not slowing, I don?t think the rpms actually drop, it?s just the gauge that drops.
Since there is a higher demand for power at high rpms and since the gauge will drop when I increase the power load by engaging the power trim/tilt, I feel this is a rectifier/regulator problem (mine is combined). Anyone have any comments on that?
Thanks in advance.
Mudd
1993 Johnson OceanRunner 140
Model # VJ140TXETF
