1979 Merc 70HP Reverse Cam

[Kapt Bobby]

I am trying to find the Right Position to put my reverse cam in. I fell out when I removed the Lower Unit to install a Water Pump and Impeller. Man this is Driving me CRAZY.

 

[GA_Boater]

Combined your posts.

Did the upper or lower cam fall out?

The upper cam fits in the midsection and only fits one way. Slather it with marine grease and slip it into the matching slot in the midsection.

The lower cam fits over the splines on the lower shift shaft. Put the lower unit in forward and the flat on the cam should face forward.

 

[Kapt Bobby]

Is the Forward Spot on the Cam the HIGH Spot???? Does the Prop Turn Clockwise for Forward???

 

[Kapt Bobby]

Which way way does this fit

 

[Kapt Bobby]

Is there a SPRING that goes to this reverse lock out Cam ???

 

[tommarvin]

You should be able to tell which way the prop turns forward by looking at the prop blades,

 

[GA_Boater]

Is there a SPRING that goes to this reverse lock out Cam ???

No, the spring is on the hooks on the swivel.

 

[Kapt Bobby]

GA_Boater Where are the Hooks and Swivel for the Spring to go on??? I think Mine came out or got lost when I took it apart. What does the Spring look like????

 

[GA_Boater]

It didn't come out. The hooks latch on the tilt pin and spring is up there.

 

[Kapt Bobby]

OK I see the Spring,so maybe the TILT PIN has to be in place for the Controls to Work??? I have not had the Tilt Pin in when I was trying to get the Motor in F-N-R . It seems like the Tilt Pin Goes in the 2 Hooks with the Spring on it.

 

[schematic]

Which way way does this fit

when in neutral, the cam should look like this.....

 

[Kapt Bobby]

schematic THANK YOU.

 

[schematic]

your welcome...

 

[Kapt Bobby]

Does the motor need to be down with the tilt pin locked into to 2 hooks with the spring for the F-N-R to work ??

 

[schematic]

do not forget!!! you should not attempt shifting unless the engine is running OR you manually rotate the prop while shifting...

 

[Kapt Bobby]

schematic ,I will turn the Prop ,but do I need to have the Pin through the double hooks with the spring??

 

[GA_Boater]

Tilt pin has nothing to do with shifting.

What is happening when you shift other than not going into reverse?

 

[Kapt Bobby]

GA_Boater ,I can only get Reverse . It seems like the Cam needs a Spring to help Push it back to Forward or something.

 

[GA_Boater]

Forget about the spring and reverse lock when you have a shifting problem. Your upper and lower shift shafts are out of sync.

Follow this to get them back in sync - https://forums.iboats.com/forum/eng...od-of-shift-shaft-setup-for-mercury-outboards

 

[Kapt Bobby]

This is what y Cam looks like. All of the Replacements I have seen have more Material to the left of the line that I drew on it. This thing did work PERFECTLY before I Dropped the LU to instal a new Impeller.