Could you explain the process on cutting them. Was it pretty straight forward. What did you use?
i just did mine last night. Thin blade pull saw went right through it. An oscillating tool or even fine hacksaw would as well, it’s soft plastic.
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Could you explain the process on cutting them. Was it pretty straight forward. What did you use?
I followed some other people here on this site and put the Aetnas in the original housings. Looks factory.
View attachment 103248 View attachment 103249 View attachment 103250
I followed some other people here on this site and put the Aetnas in the original housings. Looks factory.
View attachment 103248 View attachment 103249 View attachment 103250
Aetna uses a tooth counter in the bell housing which was supplied by Sea Ray on both Cummins and Caterpillar engines. Aetna then manipulates the tooth count based on how you set the dip switches in the tach but none of that is affected by the throttle linkage unless it was always set incorrectly. Everyone I know just installs the Aetnas and runs them with no problems.
Thats what I thought. Just wanted to make sure the readings were accurate and if so my port engine at WOT is a little low. I'll confirm the linkage is allowing WOT and if is then I'll have the props sent out.
Ok,
So I got the new ones. Doing the swap Saturday. Doesn't look like just a quick change over and they are far from plug and play.
bump:
Pulled out the old ones. In the process of getting the bezel off of one to get the old tach out I cracked the glass. How did you get it off without cracking the glass?
Then as others have done I cut a hole in the back of the old housing to run wires. I went with the home depot rubber pipe joint idea to fill the circumference of the smaller new tach.
Here is where I loss interest in changing them out. On a 460 the wires are pretty short so it looks like I would have to lengthen them to reach the terminals of the new tach, also the fit of the old housing with the rubber joint seamed pretty loose still. Oh and just for the hell of it I hooked one up with out the housing and it read zero.
The bummer part is flounder pounder only sells the tach as a complete unit. You just cant order the glass... " do any of you know where I can"
So what I am asking. Those of you that have done the swap out. Could you maybe add to your pictures a brief explanation to your whole process.
Thanks for the help.