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Author Topic:   Trim Gauge 1995 Evinrude 88
modenacart posted 02-11-2009 09:04 PM ET (US)   Profile for modenacart   Send Email to modenacart  
How do I know which trim gauge to use with my evinrude 88 engine, year 1995?


Tohsgib posted 02-12-2009 12:24 PM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
They should all work. Personally I think trim gauges are not necessary on outboards. You go by the way the wake is laying down or by handling. A gauge is only good if you unable to see the engine(I/O) or you have inexperienced drivers that you want to tell them to set the trim at X and that is ideal, etc. OTher than that they usually break at the engine sender which is a PITA to change and expensive compared to a $35 gauge that rarely goes bad.
modenacart posted 02-12-2009 06:16 PM ET (US)     Profile for modenacart  Send Email to modenacart     
I could see it be useful at night.
jimh posted 02-12-2009 09:24 PM ET (US)     Profile for jimh  Send Email to jimh     
If seeking a replacement trim gauge which will be compatible with the sending unit in a 1995 Evinrude 88-HP motor, I suggest you rely on the manufacturer of the trim gauge to inform you if it is compatible.

Trim gauges work on a very simple electrical principle: the variable resistance of a sending unit controls the current flow in the circuit, and the current is made to flow through an ammeter which has been calibrated so that its dial reading corresponds to the position of the engine trim.

Concerns about compatibility lie along two main topics:

--is the dial indicator of the gauge marked with a legend that corresponds to the engine position?

--is the sensitivity of the ammeter appropriate for the circuit?

With regard to the arrangement of the trim sensor, there are two main areas of concern:

--is the range of resistance appropriate for the circuit?

--is the correlation of resistance to engine position congruent with the dial markings of the indicator?

In the trim circuit, there are two distinctly different possibilities regarding how the trim sensor controls the current:

--the current is maximum with the engine is trimmed to the highest position, or

--the current is maximum with the engine trimmed to the lowest position.

Tohsgib posted 02-13-2009 11:11 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
Stern light should be enough to see the engine with. Plus night driving should be slow so tucked in would allow the slowest planing speed.
seabob4 posted 02-15-2009 01:37 PM ET (US)     Profile for seabob4  Send Email to seabob4     
Keep in mind about trim gauges. Merc and OMC/BRP work backwards from each other, i.e. up will be down, and visa versa. An OMC/BRP motor needs an OMC/BRP specific gauge, regardless of gauge manufacturer.
pglein posted 02-19-2009 02:20 PM ET (US)     Profile for pglein  Send Email to pglein     
I'm a pretty experienced operator, and I think a trim gauge would be quite helpful. When my engine is running, you can't hear the trim motor. When running at high speed, I tend to trim the motor up. I do this as mentioned, by observing the wake and trim of the boat. The trim gauge would be of minimal benefit here. However, when I slow down, I like to return the engine to the full "down" position. It is often difficult to tell if the engine is all the way down or not. I don't like the idea of continuing to run the trim motor after it has reached this point. A trim gauge would be quite helpful with this, as it would allow me to keep my eyes forward as I enter the more crowded area around harbor entrances while performing this action.
modenacart posted 02-20-2009 05:12 PM ET (US)     Profile for modenacart  Send Email to modenacart     
Trim gauge was 15 dollars off ebay shipped and new in box. I think it will be worth the cost now.
modenacart posted 02-24-2009 05:03 PM ET (US)     Profile for modenacart  Send Email to modenacart     
Was really easy to install, worth the expense and effort.

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