2003 115hp 4-stroke

[billallenbuilds@gmail.com]

2003 115hp 4-stroke...pulled lower unit and 5"spacer off so I can install a 20" lower unit. Water tube has an extension piece on it that doesn't want to move....may have spun entire tube up into power hesd...did I cause a problem? Nothing wrong with lower unit but has 25" shaft and I need 20" ...I'm trying to locate a 20" lower unit and sell/trade my 25". Is changing shaft an easier better option? I have a good deal on a lower unit from a 200hp...would that work? Bolt pattern fine but will everything connect inside? How about gear ratio, etc? Enough for now, sorry so lengthy a 1st post!@

[billallenbuilds@gmail.com]

I now have a 20" lower unit to install....but I'm concerned about water tube...seems loose up high so I've decided to replace. Now I have to remove entire power head....wondering if I need to pay my marine mechanic to do so...a bit much for me?

[robert graham]

It would be a bit much for me….experience and knowledge can be worth a lot…. Let the expert do it..

[TownsendsFJR1300]

Looks like the water tube (part #2) simply pushes up into a seal. Pulling the powerhead does not appear to help:

https://www.boats.net/catalog/yamaha...g-drive-2-f115

Capture.JPG

[99yam40]

how could #4 be a COVER, WATER PUMP HOUSING when it is on the top end of the water tube in the parts drawing?

[boscoe99]

Where is the OP?

He mentions a 5 inch spacer. An F115TXRC does not use a spacer.

Sounds like he might have an F115TLR that was converted via a Bay Manufacturing extension kit.