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Perfect! Thanks!

Makes diag easier when I'm not guessing!

Before I go digging, I just want to verify....

I replaced all the gauges on my boat over the weekend. Turned on my Nav/Anc switch and I have no illumination.

Just double checking that the...

Interesting!
It seemed like the Tempest 25P was struggling, like the boat was to heavy, till we pulled plugs then it would just blow out. That was Full load and full livewells.
Oddly the Fury 4...

I didn't have a Fury 3, but the Fury 4 25P is a good runner.

The Tempest, you are correct on one "half" plug but it would blow out right at nose over. If I played just right, and I mean JUST...

I didn't get a chance to run it this weekend. Hopefully this week. My blow out rings showed up saturday, so hopefully that is my animal!

This weekend I'm going to move some gear around and try the 25M again as well as the 25 Trophy I have. I was hoping the blowout rings that I ordered would be here, but it looks like they won't show...

Folks last weekend on Prior said they weren't moved up yet, but weren't as deep as they were a week ago. Staging is kinda what one guy was thinking.

I haven't found one of those yet.
You said run a 24 not the 25? The 4 blade Fury 24 I was against the high speed engine alarm at 5850.
I'll keep my eyes peeled for that one. I think I saw a 24 on...

INTERESTING!
I have a 25 Trophy. I'll go give it another try after the blow out rings show up that I ordered.

Man it would be nice if that worked. I can't find a Fury 4 blade anywhere right now...

OK guys... I have a post in the prop section too... but I was thinking you guys may have crossed this bridge at some point too.

1997 TR21... so SUPER early hull... honestly... I wish I could find...

Yeah, I've heard that as well, but if there isn't anything else like it... I'm kind of stuck.

24 Fury, hops right up but max speed was 58mph right at the limiter. That was 3" PTP, we then went to...

So... after about 4.5 hours testing this weekend on my boat, I got PTP set nicely and found that a Tempest is just to fickle on my 1997 Triton TR21. One plug it won't get up. Half a plug it blows...

Ah. Sorry I forgot I asked that. You have a valid point there. Although the 'bay does have a good number of those parts.

Why?
I'm not sure what that would do.
Are any of those places going to tell me how this brand new tach is wired?

I know where to get the idiot lights. I would rather not run them in the...

The diagram is simple. The OE gauge has power. The 4 wires go back to the motor and the ECU controls ground to turn the light on. Super simple.

That's why I was hoping that the gauge I found...

Thank you! I was trying to find that! Their numbering on that page VS what the part number of the tach didn't line up, so I wasn't 100% it's the correct one. This one appears to be "with hour...

Yes, as I said..... No can. No Smart anything. Very dumb. 4 light blubs. I brought up CAN because I was wondering if that was how this tach worked with the OMC. The tach doesn't say what year...

Ok, so I'm getting ready to put my boat back on the water finally.

One of the things I found last fall is my Opti (serial in signature) doesn't have the option to hook to any smartcraft or any...

Those look pretty slick. I may have to build something like that, as my tubing isn't quite that size.

So last fall I picked up a 1998 TR21. The previous owner got an almost new trailer to put under it, but it's not for the correct hull.

The trailer pulls great. Dual axel with disc brakes. ...

Got a look at it last night. All 6 were starting to melt, 6 being the hottest was the first to go.
Next time I stop by I'll try to grab some pics. Last night it was a flash light in the dark.
...

Try disconnecting the illumination circuit to the gauge.

I've seen gauges fail internally where they see the illumination circuit come on and the internal circuits have an issue causing the...

Well... The world may never know.

He was out over the weekend with it. Running about 5200rpm cruising and #6 went down. Looking at all holes, he should have gone up at least one jet size maybe...

We were wondering about possible water intrusion, but it was all 6 plugs, pretty evenly across all cylinders.
Compression test was even across all 6. He doesn't have a leak down tester, so we were...

A buddy of mine has as 200 FF block. Carb motor.
He sent the heads out and had them shaved for more power.
He's running 93 Octane
He's been running Penzoil at a 40:1.
It's still pretty cold...