Twin Mercruiser L6's '74 165's now 292

[ttownthomas]

I have finally, after a year, gotten my outdrives back after their rebuild. I have rebuilt transom assemblies to install in my newly rebuilt transom. Now I'm going through the engines before reinstalling everything. Compression was good on both engines. Already replaced risers and manifolds. After looking at these pictures can I get feedback? Should the water pump be replaced? Is this block rust a concern to any experts? I'm replacing the valve cover gasket, water pump gasket, thermostat, thermostat housing gaskets, pushrod cover gaskets and the oil pan gasket. Should I also do the timing cover gasket?

Marineblock - 7 by ttownthomas, on Flickr

Marineblock - 6 by ttownthomas, on Flickr

Marineblock - 3 by ttownthomas, on Flickr

Marineblock - 2 by ttownthomas, on Flickr

Marineblock - 1 by ttownthomas, on Flickr

Marineblock - 4 by ttownthomas, on Flickr

Marineblock - 11 by ttownthomas, on Flickr

Marineblock - 12 by ttownthomas, on Flickr

 

[Scott Danforth]

any fresh water cooled block will have rust. its the nature of the beast

yours looks to be fresh water only.

replace the the waterpump as the housing looks sketchy

 

[ahicks]

What does the oil pan look like? Any serious pitting?

 

[ttownthomas]

What does the oil pan look like? Any serious pitting?

well, after your question I went to pull it and I cant get it off. these stands make it tricky and I cant get it off without removing the flywheel. I cant seem to budge the flywheel nuts...any suggestions?

Marineblock - 1 (1) by ttownthomas, on Flickr

Marineblock - 2 (1) by ttownthomas, on Flickr

 

[Scott Danforth]

pick the engine up, remove the stand, remove the oil pan

 

[ttownthomas]

pick the engine up, remove the stand, remove the oil pan

was hoping to avoid that. No cherry picker at the house. anybody have a line on the hoist brakets?

 

[ttownthomas]

I guess ill pick up a cherry picker....on another note, is it worth the trouble to pull the crank pulley and replace the timing cover gasket"

 

[achris]

I guess ill pick up a cherry picker....on another note, is it worth the trouble to pull the crank pulley and replace the timing cover gasket"

1. You appear to be in a shed, sling a rope around a truss and use a chain block and lift the engine.
2. Gaskets should be replaced any time they are disturbed.

Chris..........

 

[Scott Danforth]

4 ratchet straps to the roof trusses will support the motor

 

[ahicks]

Geez, just don't pull the roof down on you...

Cherry pickers are cheap at Harbor Freight, and the fold up nice so they don't have a big foot print when not in use. I bought a half ton on sale for less than a hundred bucks. I've had a 400lb outboard on it with no issue. Never had the occasion to handle anything bigger, but I wouldn't hesitate if necessary. It's pretty solid....

 

[ttownthomas]

It’s my garage. I can use a cherry picker. I like excuses to buy tools. How does the crank pulley come off? With a puller? I’m assuming it’s splined or keyed

 

[Bt Doctur]

The 292 aka 300 -6 inline is about 2-3 inches taller and your oem exaust is too short, you will need wet exaust hose

 

[kenny nunez]

292s have a bolt that retains the harmonic balancer. After removing it just get a standard 3 point puller with some 3/8” 16 bolts.
As the Doc said the 292s are taller and the pan is also deeper, usually this causes no problem but worth checking.
Also as the Doc said the exhaust hose needs to be lengthened, since the riser outlet is larger than the lower end where the lower exhaust connects you will have to cut the hose in the middle and lengthen it with some stainless or suitable tubing.

 

[Scott Danforth]

deck height differences

230/250 = 9.150
292 = 10.875

use a damper puller

 

[ttownthomas]

Thanks, the 292’s were already in the boat so I know they fit!

 

[ttownthomas]

I bought an engine hoist, put it half way together and realized they gave me mis-matching boxes from different versions, took it apart, returned it, put the correct parts together and then realized the chains I had were not long enough. 2 Trips to home depot later the Oil pan is finally off. I cant find any pitting as asked by ahicks. I also pulled the harmonic balancer and took the timing cover off. Anything Else I should be looking at while im at this point? Also Many of the gaskets are showing out of stock right now at this site and other marine websites. When I'm dealing with gaskets that seal oil can I use automotive?

 

[achris]

.... When I'm dealing with gaskets that seal oil can I use automotive?

Yes. Only the head gaskets need to be 'marine'.

Chris...

 

[Scott06]

I bought an engine hoist, put it half way together and realized they gave me mis-matching boxes from different versions, took it apart, returned it, put the correct parts together and then realized the chains I had were not long enough. 2 Trips to home depot later the Oil pan is finally off. I cant find any pitting as asked by ahicks. I also pulled the harmonic balancer and took the timing cover off. Anything Else I should be looking at while im at this point? Also Many of the gaskets are showing out of stock right now at this site and other marine websites. When I'm dealing with gaskets that seal oil can I use automotive?

Yes only gaskets u need marine are head gaskets

 

[ttownthomas]

What about the thermostat? Should it be marine?

 

[achris]

What about the thermostat? Should it be marine?

Yes. Temperature is different from a car, and also is made of 'non-iron'...