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October 1, 2018 at 5:40 pm #37920
Canāt reach rpm and black smoke usually means fouled props or dirty bottom. If you do a lot of slow cruising you may not notice it. I would make sure I have a clean bottom and test before getting into engine.
March 23, 2018 at 9:08 am #29893I don’t think I am confusing things
1. (The Problem ) The port side does not have any tachs working upper or lower.
2. Part of my trouble shooting I tested a port tach to make sure I have at least one good tach. This would eliminate the problem being I just have 2 bad tachs. I did this by using starboard engine wire at dash.
3. Yes, I have one Signal generator at flywheel housing that operates both tachs.
4. ( The Question) How can I test the signal generator at the Flywheel to make sure it is producing signal?
Sender part # 3078155 there are two ends one is plugged and the other is plugged into engine harness.
-there are two wires being used from the sender. should I assume one is power going to the sender and the other is signal going to the tach?5. one more problem I am dealing with, when the port engine is running the buzzer does not shut off. I and tracking that next. I thought that was from oil pressure sender. would the tach have anything to do with buzzer? and yes engine has oil pressure and reads so on the gauge.
March 23, 2018 at 7:33 am #29891Here is where I am at the moment
lower port helm tach is a good tach, I verified this by attaching the lead from starboard engine and it worked fine. I did this because the lower port tach I removed had the needle pegged at 4k with or with out power to it. So I wanted to make sure I have a working tach at lower port helm. While testing I went to fly bridge and the starboard tach worked with starboard engine even though I had switched the leads at lower helm (port lead to starboard tach and vis versa) I was checking to see if the upper and lower helm shared a signal or had independent signals from the motor. With everything hooked up back the way it is supposed to be (except I have no tach installed at upper port helm) the port is not working.
my next step is to try and test to see if the signal generator is producing a signal and check the signal input line at the helm. (other suggestions appreciated)
My question is how do you test that signal ?
More info
1. I bought the boat with this problem so have no prior info and cant get it.
2. Engines did get wet, and I have checked and cleaned connections
3. 4BT serial # 45294155
4. Part number for the signal generator on flywheel housing 3078155January 22, 2018 at 7:35 pm #27385Thanks Tony, I travel at lower speeds most of the time but like the ability to move a little when needed. What would I have to do to upgrade the cooling system. That sounds better then messing with the adjustments on a good running engine.
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