2004 Mercury 90 HP Saltwater Series - Model 90EXLPTO

[mdcrab]

Hello,

I was wondering if anyone could give me any assistance on what I need to do to convert the lower unit of my 2004 Mercury 90 HP Saltwater Series from a 25-inch XL shaft to a 20-inch Long shaft. The model that I have is 90EXLPTO. It appears that the only difference between a 90EXLPTO (25-inch) and a 90ELPTO (20-inch) is the size of the shaft.

Is it easy to convert the 90EXLPTO to a 20-inch shaft. I looked at the parts diagram and it appears that the 25-inch has a removable spacer. Do I simply have to remove the 25-inch spacer and swap out the 25-inch drive shaft to a 20-inch drive shaft? Does the 20-inch need a spacer?

Any help would be greatly appreciated. I purchased this motor recently and want to convert down to a 20-inch shaft before I put in on the boat.

Do you think it'll be okay to run the 25-inch shaft on the 20-inch transom. I understand that performance will be degraded, but I don't really need to go super fast.

 

[Laddies]

Re: 2004 Mercury 90 HP Saltwater Series - Model 90EXLPTO

You would hate a 25' engine on a 20' transom, to change over if the engine came as a 25' from the factory you must remove the spacer, change the driveshaft, shiftshaft and water tube, some water tubes some can be cut, goto the BAM Marine site with your serial number and double check the parts breakdown.

 

[mdcrab]

Re: 2004 Mercury 90 HP Saltwater Series - Model 90EXLPTO

You would hate a 25' engine on a 20' transom, to change over if the engine came as a 25' from the factory you must remove the spacer, change the driveshaft, shiftshaft and water tube, some water tubes some can be cut, goto the BAM Marine site with your serial number and double check the parts breakdown.

Laddie,

Thank you for the help.

I appreciate it!


Ray

 

[mdcrab]

Shift Shaft Question / Re: 2004 Mercury 90 HP Saltwater Series - Model 90EXLPTO

Shift Shaft Question / Re: 2004 Mercury 90 HP Saltwater Series - Model 90EXLPTO

You would hate a 25' engine on a 20' transom, to change over if the engine came as a 25' from the factory you must remove the spacer, change the driveshaft, shiftshaft and water tube, some water tubes some can be cut, goto the BAM Marine site with your serial number and double check the parts breakdown.

Laddies,

I looked up the part number for the shift shaft. There were two shift shafts available for my motor. One was for a manual model. The other part number is for, I'm assuming, a non-manual model. Do you know what they are referring to when they are talking about a manual model??? Hopefully, this is an easy questions for you.


Ray