The saga continues..... the lower leg

[Braun]

Ripped the lower leg off of my boat and what do i find?clear signs that the bonehead who had my motor apart last just didnt know what he was doing or didnt care. 3 of the 4 bolts on the impeller were barely on, packing tape on the gear shaft....... I am going to start dissasembling it peice by peice tonight or tomorrow. Right now I am reading the book Horsetrader sent me to give me a little more knowledge on what the parts are and what I should be looking for. I am glad that I am somewhat mechanically inclined. First time with a boat motor but its doable.

If anyone on here knows much about the lower leg and is willing to offer any advice before I rip into things....

Its a 65hp 2 stroke - 4 cylinder mercury. 1966-1971(dont have the exact year pinned down yet. Looked up the serial number multiple times and get different years. If anyone help out with this that would be great)

Short list of the problems:

- no water pumping out the engine
- the guy clearly has had it apart and never put it back together properly. The shaft will engage the prop but I believe he put it back together without some parts due to alot of slop in the prop shaft. enough to turn the prop and slip the gears that engage the prop

[Braun]

All signs pointing to the year 1966.

[chubbdarter]

post the serial #...please

[calgarygringo]

What is the model/serial. I may be able to help.

[Braun]

there were two numbers where I know the serial number is supposed to be. one 8 digit number and one 7 digit begining with "HA". this is what threw me off to begin with. because I think i was looking at the wrong number.

Model: 650 Four

number 1: HA2014 221 (90% certain this is the serial number)
number 2: 1440 - 1443


Thanks to horsetrader I have a book with great details on taking things apart. still not familiar enough with boat motors yet to troubleshoot what is missing or damaged.

[chubbdarter]

there were two numbers where I know the serial number is supposed to be. one 8 digit number and one 7 digit begining with "HA". this is what threw me off to begin with. because I think i was looking at the wrong number.

Model: 650 Four

number 1: HA2014 221 (90% certain this is the serial number)
number 2: 1440 - 1443


Thanks to horsetrader I have a book with great details on taking things apart. still not familiar enough with boat motors yet to troubleshoot what is missing or damaged.

stamped # or cowl #

[Braun]

both are stamped in to the same side on the mounting bracket that sits on the transom

[sjb]

Not saying these are the correct answers but just my thoughts
No water pumping out of the engine ever? as it may not pump out of the small nozzle due to the water being too cold and the engine never gets warm enough to open the thermostat. If running the engine for awhile at high idle and it pours out then stops then starts again then it is fine, but if it never pours out then it points to the water pump is probably needing a new impeller.
As for the slip in the prop shaft. It sounds possibly when the other guy had the lower leg off they did not make sure not to spin the gear shift rod and it is possibly out of adjustment.

[chubbdarter]

both are stamped in to the same side on the mounting bracket that sits on the transom

k....let me see if i can find you a lower unit

[Braun]

k....let me see if i can find you a lower unit

Ha. if you could find a whole lower unit i will buy a you KFC for a year. lol.

[calgarygringo]

First link tells you about the serial the second is the listing of all serials for Mercs.

http://www.ehow.com/how_5031889_out-year-mercury-outboard-motor.html

http://www.marineengine.com/mfr/mercury_models.html

[Braun]

Not saying these are the correct answers but just my thoughts
No water pumping out of the engine ever? as it may not pump out of the small nozzle due to the water being too cold and the engine never gets warm enough to open the thermostat. If running the engine for awhile at high idle and it pours out then stops then starts again then it is fine, but if it never pours out then it points to the water pump is probably needing a new impeller.
As for the slip in the prop shaft. It sounds possibly when the other guy had the lower leg off they did not make sure not to spin the gear shift rod and it is possibly out of adjustment.

No water pumping at all. the water pump may ultimately work. When i took the lower leg off, like i said. the water pump barely had the screw in it. He may not have reassembled it properly. anyone know how to / if you can test a water pump independently while the motor is apart?

[beehive]

Throw the whole thing out except for the cowling ,use this as a tomato planter. Buy a new 4 stroke.

[sjb]

not sure if this image helps, but is this where you are getting the info from?

[Braun]

First link tells you about the serial the second is the listing of all serials for Mercs.

http://www.ehow.com/how_5031889_out-year-mercury-outboard-motor.html

http://www.marineengine.com/mfr/mercury_models.html

my motor doesnt have a tag like that anywhere on it. I looked at that website before. the only numbers I can find anywhere that show any inkling of a serial number is the 20 numbers stamped on the mount on the left side(standing behind the prop)

[Gust]

I got 1971 as the year when I went looking awhile back.

[liar]

never worked on a merc before but last year my evinrude 15 hp would not flow water out of the pee hole . took it apart and the wp looked ok but i replaced the impeler and the metal housing it rides in and it has run fine since . i was told that the wp clearances are critical and may look ok but the imperler does wear and although it may look ok , its a cheap part to change out and an easy fix .
good luck .

[Braun]

I got 1971 as the year when I went looking awhile back.

ya. I hate that. I have been getting mixed results but more and more 1966comes up for me.

Here is the deal though. according to this book that Horsetrader sent me, for all these years the lower unit can only be made up of certain combinations.

2 different style water pumps
- high pressure
- high volume
this book shows how to identify each one and shows diagrams of how
they are assembled(also shows how to replace them. according to the
book mine is a High pressure. 100% certain

2 different style shifting mechanisms
lucky with this one that shifting mechanism type one was only used
with the high pressure. and type two only ever used with high volume
pumps. this means I have a type one. once again it breaks down each
component of the shifting mechanism

3 different style driveshaft arangements.
I wont go into detail on the differences. by visual process of
elimination, the first one is not it. the other 2 types you cant tell till its
disassembled but the one was only used on newer models of this book
and mine is in the older catagory so I am pretty sure which one it is
but i wont be positive till later.


my big question is, if a different lower leg is found, does it mater if say the new leg has one of the other 3 variations? if its the same size leg but has the different pump, will it make a difference.

[chubbdarter]

Braun...just got a return email from a buddy in the biz....i need a pic with the prop off directly at the face of the race on the shaft....and if there is a number on the face
also by the lower plug , is there a number on the casing?

[Braun]

Is this what you mean chubbs? there was no writing directly on the face of the shaft. my book says that the first year they switched to a new shaft assembly they stamped an "A"on the face. but didnt for subsequent years the assembly was used


Also from what i can tell there was no number on the casing by the lower plug on the casing. that side of the casing is rather scratched up though.

http://img21.imageshack.us/img21/2343/calgary2011052700014.jpg http://img864.imageshack.us/img864/8977/calgary2011052700015.jpg

[Braun]

ps. thats not rust. its grease and oil. the motor needs a thorough cleaning

[chubbdarter]

i will send him those pics

[Braun]

are those the pics he wants? i can take a bunch of the motor and the top section of the lower leg. hang on a couple minutes and i will get a few more pics

[chubbdarter]

are those the pics he wants? i can take a bunch of the motor and the top section of the lower leg. hang on a couple minutes and i will get a few more pics

whatever you can take pics of will help.
im fishing tomorrow and sunday so i cant help you till later both days

[Braun]

Ok here are a few more pics. and the facts that I know for sure about the motor.

1966 65hp 4 cylinder 2 stroke
the lower leg has a High preasure water pump(not high volume)
and i am like 70% certain that the drive shaft arrangement is a "old style driveshaft WITHOUT a preload pin"

http://img90.imageshack.us/img90/3530/calgary2011052800016.jpg
http://img844.imageshack.us/img844/5886/calgary2011052800018.jpg
http://img37.imageshack.us/img37/1667/calgary2011052800019.jpg
http://img850.imageshack.us/img850/3519/calgary2011052800022.jpg
http://img32.imageshack.us/img32/4612/calgary2011052800025.jpg
http://img683.imageshack.us/img683/4765/calgary2011052800028.jpg

[chubbdarter]

i will make sure garth has access to those pics tomorrow

[Braun]

thanks chubbs. if you need any other info let me know. Greatly appreciate your help. Im going to start taking apart this one tomorrow

[Braun]

well, no wonder why no water was pumping. The impeller is completely shredded. The pump was put back together missing one gasket between the cover and the pump base and the 2nd gasket is pretty shredded. out side of the the watter pump seems to be infair condition. oil seals seem to be fully intact might see if i can order and entire new water pump assembly kit though rather than just the gaskets and impeller. im sure parts will be difficult to come by though

[Braun]

im havent trouble getting the internal casing for the drive shaft out. i know its typicalle done with a special tool. but it should come with a hammer and screwdrivers. not getting far though. Anyone have that tool\? or am i missing a step to getting that houseing out> does it neet to be in a certain gear?the book explains it but is a bit foggy

[Braun]

Another option to get that inner house out other than that special puller tool is a sliding hammer. the bearing carrier just wont budge.

[chubbdarter]

Braun the pictures were delivered and he is on the search for you...sorry for late reply..just rolled in off the water

[Braun]

No worries chubbs. How did you make out today

[chubbdarter]

No worries chubbs. How did you make out today

skeeters were huge, it was cold, it was wet, it was sunny, breakfast sucked, supper sucked.
Fishing was great....and the laughs were non stop....a adventure of unreal proportions....one of the best fishing trips ever.