Building a '93 Caravelle 1750 Classic Bowrider

Reserector_

Chief Petty Officer" & 2021 Splash of the Year Win
Joined
Oct 15, 2019
Messages
592
View attachment 390670
According to that calculator, the engine is turning around 4750 RPMs. Either that, or the final drive ratio is 1.28:1 LOL

Earlier in the build I turned the input shaft and counted the revolutions of the output shaft and estimated 1.88:1 That was based on a 17 spline output shaft rotating one full revolution, plus 15 of the 17 splines. Therefore, I think that 1.85:1 is likely correct.

I'm going to verify my tach before I go any further.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Messages
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Turn the input shaft 5 or 10 times. Really easy to confuse 1.84 and 1.97 with only 1 turn
 

Reserector_

Chief Petty Officer" & 2021 Splash of the Year Win
Joined
Oct 15, 2019
Messages
592
I hooked up my inductive tach on the boat Saturday and I could not get it to give me a proper reading. Maybe it was the short spark plug wires in close proximity, but it was indicating 6500 when it should have been around 1100. I tried it on my truck and the meter was fine.
So, I went to the store and bought an optical tack. Stuck a piece of reflective tape on the water pump pulley and I was in business.
The Faria tach in the dash is clearly way off. at 740 rpm the Faria is reading 1150. I ran it up as high as 3000 on the Faria (on muffs) and the optical tach showed 3800!!

Naturally, I crawled under the dash to check the setting. Also naturally I found a spider web and a large wasp nest. I was happy the spider web was there, because it blocked the wasps from making a direct path to my face.

With the misplaced nature removed, I found that the setting was on 2 while the label indicated that it should be on 1. Of course I tried that when I first installed it, but it was way off. 2 was the closest setting to actual.
For good measure, I tried the other settings, but came back to 2 (I think) It was getting dark and I was planning to run the boat Sunday as-is.

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Now that our family outing is done, I can pull the gauge and adjust it at my leisure. There is supposedly a fine tuning 000 philips screw that I ca try as well. We shall see.

In the meantime, the boat is dong great. We had a good time Sunday,
after church.

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My Tilt/Trim sender is hit and miss, so I ordered a new one. Same with my fuel sender. I will get those things freshened up and hopefully get to run it a couple more times this fall.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,562
spin the selector switch back and forth to clean the contacts. however it should be set to 1
 

Reserector_

Chief Petty Officer" & 2021 Splash of the Year Win
Joined
Oct 15, 2019
Messages
592
I have a new fuel gauge and a new tilt/trim sensor to install. I was going to get started on those Saturday afternoon, but I am glad I got lazy, because my niece drove 15 hours for a surprise visit.
Since I hadn't torn anything apart, the boat was ready for action! We were able to hit the lake for a little while. It was her son's first time in a boat, and her first ride in mine that she read so much about on facebook. They were all smiles, and I was a proud uncle. THIS is one of the reasons why I built the boat.
My oldest boy was also up for a ride.
It was a chilly day. somewhere in the mid 60s, but with a strong breeze. Light jackets and now Bimini kind of day.

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