93 Mercruiser 3.0 swap to a 1984 Mercruiser 140, what do I need to know...

[Maclin]

Hey Buck, looks like Rich has you covered on the other site, but you have been using the driveshaft as a lever so if you did not notice any play left-right up-down then the rubber part is probably intact. The splines tell the rest of the story.

 

[UNSUREBOATGUY]

You may already have this covered, but having the same engine, and having dealt with broken starter bolts, I highly recommend using the front bracket on that heavy starter to save your bolts.

 

[saltybutwet]

Hey Buck, looks like Rich has you covered on the other site, but you have been using the driveshaft as a lever so if you did not notice any play left-right up-down then the rubber part is probably intact. The splines tell the rest of the story.

Thanks! and yes Rich gave some good advice. I will take a pic of that coupler and post it. I beleive it is in good condition

 

[saltybutwet]

You may already have this covered, but having the same engine, and having dealt with broken starter bolts, I highly recommend using the front bracket on that heavy starter to save your bolts.

Thanks for the advice. I do have the starter support bracket from the 93 3.0, maybe it will work? If not I weld something together for it

 

[saltybutwet]

Well my coupler splines are trashed, so i will have to replace, but not at the moment. I am now awaiting my expansion plugs for the cylinder head, so i can pressure test the block, before I move forward, just want to be sure that the water jackets are not cracked

 

[saltybutwet]

Well, I thought I would update this thread...
I have been wanting to pressure test the block before I move forward on this project. I had a leaking head casting plug ( aka, Freeze Plug) . I couldn't locate the part number for that small brass casting plug, so i could purchase one, but just for pressure testing I found a way around that issue

I found a way around that leaking head expansion plug ( aka, Freeze plug) worked perfect!

Now, I was able to pressure test the block: before I move forward with the project. The Block is holding steady pressure. I put 20 psi in it, and it vary slowly starter to drop down a little to 17.1 psi. I still have a few air leak gremlins that I need to address. I am sure that once the air leakage gremlins are taken care of, I should hold pressure, sorry my gauge is upside down

Rusted temperature sender air leakage gremlin at 20psi

Water pump hose air leakage gremlin at 20 psi. The clamp is tight, but maybe i can crank on it a bit more

and here is a pic of my new tool I got today

 

[saltybutwet]

I forgot to mention that I also got the Delco distributor installed, and seated

Now I will use the 93 3.0 manifold and riser on the 86 140
And keep moving forward

 

[saltybutwet]

I will continue to update this thread as I move forward, any additional advice, techniques, tricks, that someone wants to add is appreciate. It will help others, and myself..

Thanks to all