Erratic Tachometer Boat at Aaron Roper blog

Erratic Tachometer Boat. The tachometer runs fine for the 20 minutes of operation and then the needle swings wildly up and down the rpm scale. The most common is a bad contact on the setting screw in the back of the tach. I attributed it to the circular main harness inside the motor cover. All my gauges work properly except the tach. I have a new to me 1986 225 four winns with a 5.0 mercruiser 230 hp alpha 1. Following this, in typical boat project fashion, i am now getting erratic rpm readings on the tachometer. Once underway i noticed the tach reading erratically. There could be several reasons for erratic tach's. Had my new to me boat out today for another short shake down cruise. It also has had erratic tach and volt readings. My tach does not give accurate readings, i know this because of the following:

Diesel MultiFunctional Tachometer Aetna Engineering Fisheries Supply
from www.fisheriessupply.com

Once underway i noticed the tach reading erratically. I attributed it to the circular main harness inside the motor cover. It also has had erratic tach and volt readings. Following this, in typical boat project fashion, i am now getting erratic rpm readings on the tachometer. My tach does not give accurate readings, i know this because of the following: The most common is a bad contact on the setting screw in the back of the tach. I have a new to me 1986 225 four winns with a 5.0 mercruiser 230 hp alpha 1. The tachometer runs fine for the 20 minutes of operation and then the needle swings wildly up and down the rpm scale. All my gauges work properly except the tach. There could be several reasons for erratic tach's.

Diesel MultiFunctional Tachometer Aetna Engineering Fisheries Supply

Erratic Tachometer Boat Following this, in typical boat project fashion, i am now getting erratic rpm readings on the tachometer. There could be several reasons for erratic tach's. I have a new to me 1986 225 four winns with a 5.0 mercruiser 230 hp alpha 1. My tach does not give accurate readings, i know this because of the following: It also has had erratic tach and volt readings. I attributed it to the circular main harness inside the motor cover. Once underway i noticed the tach reading erratically. The tachometer runs fine for the 20 minutes of operation and then the needle swings wildly up and down the rpm scale. Following this, in typical boat project fashion, i am now getting erratic rpm readings on the tachometer. Had my new to me boat out today for another short shake down cruise. All my gauges work properly except the tach. The most common is a bad contact on the setting screw in the back of the tach.

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