Well, after an extensive search online for a lower unit vacuum pump, I couldn't find anything.
Didn't want to spend a lot of money, but needed to check my lower unit as I just replaced the seals.
All I had was a vacuum/pressure gauge used for testing automobile vacuum pressure and fuel pressure.
Took me a while, but after sopme experimentation I found the best plunger mechanism is a caulk tube.
Worked great! So thought I would share.
Here are some photos.
Didn't want to spend a lot of money, but needed to check my lower unit as I just replaced the seals.
All I had was a vacuum/pressure gauge used for testing automobile vacuum pressure and fuel pressure.
Took me a while, but after sopme experimentation I found the best plunger mechanism is a caulk tube.
Worked great! So thought I would share.
Here are some photos.
![386114384_fbefbb1816.jpg](http://farm1.static.flickr.com/139/386114384_fbefbb1816.jpg?v=0)
![386114386_9dafb9800f_m.jpg](http://farm1.static.flickr.com/182/386114386_9dafb9800f_m.jpg)
![386114387_d4550cd976.jpg](http://farm1.static.flickr.com/155/386114387_d4550cd976.jpg?v=0)
![386114390_706fbfc4ae.jpg](http://farm1.static.flickr.com/186/386114390_706fbfc4ae.jpg?v=0)
![386115643_ca47d48159.jpg](http://farm1.static.flickr.com/164/386115643_ca47d48159.jpg?v=0)