conversion from teledyne to oildyne tilt trim

[crokit]

i have a 1968 160 mercruiser with a pre alpha out drive .....would like to convert the tilt and trim system to the alpha style oildyne pump with the reverse check built in ....was just looking for some advice and or instructions on the proper way to do this....any help would be appreciated....thank yo

 

[kenny nunez]

Does your boat have power trim now or just power tilt with I hose to each ram?

 

[crokit]

Does your boat have power trim now or just power tilt with I hose to each ram?

power trim.....the pump now is the two hose 3 wire .....and i have the reverse lock mechanism on the shift linkage .....that i would like to eliminate

 

[kenny nunez]

If your power trim lines come out from the side of the gimbal housing rather than the bottom like the 70-71 models then you will have to have some hoses custom made to connect to the Alpha style rams.
There is a large boat salvage yard here in the New Orleans area that should have what you need.

 

[crokit]

If your power trim lines come out from the side of the gimbal housing rather than the bottom like the 70-71 models then you will have to have some hoses custom made to connect to the Alpha style rams.
There is a large boat salvage yard here in the New Orleans area that should have what you need.

thanks for the info.....is it necessary to change my cylinders .....was hoping to just change pumps and eliminate the reverse mechanism

 

[kenny nunez]

The Oildyne style are low pressure high volume. Just the opposite of what you have.
The later style Prestolite with the built in reverse lock would be the cheapest and easiest to stay with. If there are any Mercruiser shops in your area you may get one from a re power that the shop did and still had the old parts.
Still curious about the original power trim hoses, how are they routed?

 

[crokit]

The Oildyne style are low pressure high volume. Just the opposite of what you have.
The later style Prestolite with the built in reverse lock would be the cheapest and easiest to stay with. If there are any Mercruiser shops in your area you may get one from a re power that the shop did and still had the old parts.
Still curious about the original power trim hoses, how are they routed?

two hoses from pump going to distribution block at transom....splits into 4 lines.... 2 to each cylinder ....return line goes to reverse lock valve and then back to pump

 

[kenny nunez]

If the distribution block is under the gimbal housing then it must have been replaced at one time which is good.
One way to identify the pump you need is on the block under the pump. There will be a Allen 1/8” pipe plug screwed into the side where the “down” port is located. Inside that port is a spring and check ball under another set screw. Do not remove the plug and try to adjust the check ball spring.
If the pump reservoir is plastic then that will also be another way to be sure it is the right one.
If you find one on the internet be careful that it is not what you already have.
If you cannot find one I could probably locate one at that salvage yard.