Jump to content

Short or long shaft?


Recommended Posts

Hey folks, based on these spec plate attached below, is there anything that indicates the length id the shaft? Short or long?

 

thanks!

AD949F87-924D-445A-88E8-B25D9AF26DFC.jpeg

A709B82F-8713-4085-A038-89D04EDDD8FB.jpeg

Edited by siwash
Link to comment
Share on other sites

It will run poorly because the thrust angle is off. It could put excessive pressure on the transom. It may or may not get on plane. You will draft deeper so it would be easier to strike rocks. For the most part I wouldn't do it. 

Art

  • Like 1
Link to comment
Share on other sites

1 hour ago, glen said:

I don’t know about the spec plate.  But the engine is a long shaft.  

Maybe even extra long , looks like 25 inches, did it come from a sailboater ?

  • Like 1
Link to comment
Share on other sites

1 hour ago, RandyLinden said:

You have measured the engine correctly. (From the mounting bracket to the anti ventilation plate)

Short Shaft is 15"

Long Shaft is 20"

Extra Long Shaft is 25"

Extra Extra Long Shaft is 30"

 

So it is a 20" shaft, therefore long? 

Link to comment
Share on other sites

Or.  Make boat transom higher. 

place engine on boat.  Mark holes for mounting engine on boat.  Drill out holes.  Buy two pieces of 1/4 stainless steel one for each side of transom that are high enough.   Fill void with wood.  Go fishing.  

  • Like 1
Link to comment
Share on other sites

If it’s convertible it will have a 5” section bolted in on the shaft. Just above cavitation plate.  


the jack plate idea is good but a 25 has some thrust.   So jackplate or build up transom.  It’s going to have to be strong.  
what hp is the boat rated for? (I’m thinking about how strong the transom is now). 

Link to comment
Share on other sites

Yes that motor is a long shaft .. the motor will have another tag with the model  number.. should be something like J25RLxxx .   A jackplate is quicker and possibly cheaper, but a new transom would be beneficial for splash protection (backtrolling?) . after having both a short shaft and long shaft boats,  I don't want to go back to a short shaft.

Please provide a picture of your boat transom

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...