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โ Navigate your engineโs pulse with precision and style!
The Sierra International 58255P Tach 7K is a 3-inch tachometer engineered for 4-stroke outboard gas engines, offering a 0-7000 RPM range with a vivid, easy-to-read black dial featuring red graduations and white numerals. It boasts a scratch-resistant curved glass lens and near-flush bezel for durability and sleek aesthetics. Powered by 12 VDC with low current draw, it includes perimeter and thru-dial lighting for visibility and an accuracy adjustment for fine-tuning. Designed for simple installation in a 3.43" hole, itโs a trusted choice for marine enthusiasts seeking reliable, professional-grade RPM monitoring.



| ASIN | B000C4O0KK |
| Best Sellers Rank | #114,331 in Automotive ( See Top 100 in Automotive ) #37 in Automotive Tachometers |
| Brand | Sierra |
| Brand Name | Sierra |
| Customer Reviews | 4.7 out of 5 stars 343 Reviews |
| Included Components | Sierra 58255P Amega Tachometer 7K - 3" |
| Item Dimensions | 0.39 x 0.39 x 0.39 inches |
| Item Type Name | Sierra 58255P Amega Tachometer 7K - 3" |
| Item Weight | 10.24 ounces |
| Item dimensions L x W x H | 0.39 x 0.39 x 0.39 inches |
| Manufacturer | Teleflex |
| Material | Plastic |
| Material Type | Plastic |
| Model | 58255P |
| Number of Items | 1 |
| Part Number | 58255P |
| UPC | 731957419538 |
| Unit Count | 1 Count |
| Warranty Description | Please contact us if you experience any issues within 30 days of receipt. |
W**O
Good Tachometer
I installed this tachometer on a 1996 Johnson 48spl. Installation was simple. I just had to enlarge the original tachometer opening by about 1/16 of an inch. It seems fairly accurate but I only have a mini tach to check it against. It does have an accuracy adjustment, so it can be fine tuned if you have a good reference tach. The tach looks good and works well. I would definitely buy it again.
J**M
Works great on my older Mercury outboard
Arrived earlier than originally stated when ordered. Great tachometer, nice bold easy to read numbers and backlight. Don't bother ordering one of those other tachs for less that are really automotive tachs, they won't be accurate on your outboard if you get them to work at all. This tach is made for marine use and works well and is accurate on my older Mercury outboard.
S**N
Worked perfectly
Used on my 1975 Evinrude 85hp model 85593e. So as you can see itโs an 8 pole BUT in doing research apparently this motor gets set based off pulses and not by poles? I found out it emits 12 pulses so divided by 2 you get the 6p setting. Anyway it works perfect after I replaced the original stator that had a meltdown (that goo coming from the charge coils on the stator).
H**R
Quality tachometer at reasonable price
The tachometer is high quality at a reasonable price. It is a good size for the boat dash. Good value for the money. The owner provides great customer service.
R**H
Tack
Works great
B**.
Perfect Tach ๐
This was the perfect tach to replace a marine dash mounted speedometer. Black face & bezel matches other dials. Easy switch-out & replace. Good backlighting for night cruises as well!
R**M
Easy installation, as it came with instructions
Easy installation, as it came with instructions. Pretty close to the Mercury Verado one I was replacing except for the "Q" at the bottom of the gauge face. I wasn't able to test this out immediately as the boat was in the garage for the winter, but I changed the oil in the motor and was able to start it by putting it in a cut off 55 gallon drum. I have the ability to see the engine parameters on my fish finder so I could compare the rpm reading on the new tach with the read out on the fish finder and both read the same so I'm pretty happy with my purchase. I would really have liked that the important dimensions (bezel 3.25") and gauge body diameter (3.3125) as well as the depth (2.875") were in the description, but I was reasonably guessing this would fit. Also sellers do not seem to take pictures of the back electrical connections of their products so we could compare what we have to what we are purchasing. This would be a real advantage to the buyer to be able to compare one product to the other. The pictures are of the Mercury gauge, but this replacement must have been from the original manufacturer as all of the data was the same.
R**Y
Looks great works great
Looks and works awesome. Plenty of different settings to choose from for your engine type
A**R
Works great
Easy to install, works like original.
B**D
Very quick and reliable delivery
I just installed the tachometer in my fishing boat and it looks and works great at this time. I compared the rpms to a quality scan tool and must say that it is very accurate.The only reason that I didnโt give it five stars is because it would have been nice if it would have included a wire harness or at least some quality wire ends
A**R
Great product
Installed it on my boat as it never came with one. Wiring the tach was easy as long as you know the wires to connect to.
D**N
The backlight is nice
Was easy to install and it works very well on my 60hp mercury outboard .
A**K
Excellent product
Worked perfectly with my 1992 Johnson 40hp vro 2-stroke
Trustpilot
1 day ago
1 month ago