Boats For Sale:
Tach Conversion Possible? |
Post Reply 
|
| Author | |
Nautique Mike 
Senior Member 
Joined: June-20-2006 Location: United States Status: Offline Points: 147 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Tach Conversion Possible?Posted: November-07-2006 at 9:18pm |
|
Hey Gang-
Here's a good one for you... Has anyone ever tried or is it possible to convert a outboard tachometer to a inboard tach? This is for a 351 commmander. Both guages are 78' vintage teleflex with 6000 rpms. Thanks- NM |
|
|
Nautique Mike
|
|
 |
|
|
8122pbrainard
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 5:49am |
|
I Think its the number of cylinders and 2 or 4 stroke thats important for the tach to read. So wouldn't a tach read the same hooked up to a 4 cyl 2 stroke as a 8 cyl 4 stroke? Pete
|
|
|
|
|
boat dr
Grand Poobah
Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 8:57am |
|
Mike, 4/ strokes read pulses or counts at the coil,8 pulses = one RPM on a v-8 and signal wire hooks to the coil. a 2/stroke reads pulses or counts the poles on the flywheel,6 magnets=12 poles,4 magnets=8 poles,and the signal wire hooks to the rect/regulator. the newer tachs will go both ways,2 or 4 stroke. hook it up and see ,you wont let the smoke out ,it just wont read correctly....... boat dr
|
|
|
|
|
79nautique
Grand Poobah
Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 8:59am |
|
No they wil not read the same. If it was a lter model outboard that was of a four stroke design and was capable of switching to 8 cyl then it would but since there weren't any four strokes in the 70"s your SOL.
|
|
|
|
|
Munday
Gold Member 
Joined: August-17-2004 Location: United States Status: Offline Points: 538 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 4:07pm |
|
If the tach has switches on back,you can set it to 4.4 pulses per rev on a v8 4 stroke.I don't see a problem if it has switches for different applications
Good luck Munday |
|
|
|
|
79nautique
Grand Poobah
Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 4:19pm |
|
if it is designed for a 2 stroke motor it will not work for a 4 stroke motor and vise versa 4-2 regardless if it has a switch or not.
|
|
|
|
|
79nautique
Grand Poobah
Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
Post Options
Thanks(0)
Quote Reply
Posted: November-08-2006 at 4:21pm |
if you did that then it will read twice as fast as your going since there needs to be one pulse per cyclinder. |
|
|
|
|
Post Reply
|
|
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options
Munday wrote: