What power heads will this Merc lower unit fit on?

[Link]

First thanks for your time<br />I'm trying to find out what all motors this lower unit will fit on.<br />Mercury/Mariner 90 HP ELPTO Ser# OC189332<br /><br />The service manual says it is for <br />1987-1993 70-75-75 Marathon-75XD-75 Seapro-80-90 (3 cylinder)<br /><br />1988-1993 100-115 (4 cylinder)<br />And gives ser# XXX thru XXX <br />For the US, Belgium and Canada for both groups.<br /><br />Question 1:<br />Will this lower unit fit all the above motors?<br />Question 2:<br />If yes then the extention and drive shaft extention adapter should fit the same.<br /><br />If not could you point me in the right direction<br /><br />Thanks again <br />Link

 

[achris]

Re: What power heads will this Merc lower unit fit on?

Link,<br /><br />Question 1 : yes.<br />Question 2 : yes.<br /><br />Hope this helps,<br /><br />Chris............

 

[Link]

Re: What power heads will this Merc lower unit fit on?

Originally posted by achris:<br /> Link,<br /><br />Question 1 : yes.<br />Question 2 : yes.<br /><br />Hope this helps,<br /><br />Chris............

Yeee Haw <br />Thanks Chris<br />Dont know how I missed your post.<br />Sorry for taking so long to look as that just made my day/morning<br />

 

[achris]

Re: What power heads will this Merc lower unit fit on?

Glad I made your day. Just checked and the ratio in the box you have is 2.3:1, the 100/115 use 2.07:1<br /><br />Just a small prop change would make it all good. In fact, if I was buying I'd be happy with that because the higher reduction would mean more torque.<br /><br />Chris...........

 

[Link]

Re: What power heads will this Merc lower unit fit on?

Hey Chris<br />The gear ratio information wasn't in the manual. Nice to have since I want to include all the info I can. This unit was only used two days before the guy put the Jet pump on it. Two weeks later he traded it in for a 150HP with pump. At which time I bought his 90HP and it has been sitting in the garage since 1990. Time to clean out the garage!<br />Thanks again<br /><br />Link

 

[achris]

Re: What power heads will this Merc lower unit fit on?

Link,<br /><br />Just realized, the extension kit should include a longer drive shaft, a longer shift shaft, the extension housing and a longer water tube.<br /><br />Chris.........

 

[Link]

Re: What power heads will this Merc lower unit fit on?

Originally posted by achris:<br /> Link,<br /><br />Just realized, the extension kit should include a longer drive shaft, a longer shift shaft, the extension housing and a longer water tube.<br /><br />Chris.........

Chris<br />OOPS your correct.<br />The housing and drive shaft adapter I have on hand.<br />The shift and water tube adapters I will need to look for in boxes not looked at in 15 years. <br />Also the kit should have came with three longer bolts to put it together. One I have as it will not come all the way out while the prop is still on. <br />Being the Pack Ratt that I am if I recieved them, then they will still be here. (some where)<br />When I drop off the lower unit to be checked out by the local Merc dealer I will ask for the part number for the extension kit and make sure I have all the parts as a kit.<br />Thanks for the heads up on that.<br />Too many years/beers since I've played with this stuff and the one brain cell I have left is working over time 24/7 just for basic body functions LOL

 

[achris]

Re: What power heads will this Merc lower unit fit on?

and the one brain cell I have left

What, one all to your self!!!