'68 Holiday-V 120 Mercruiser I/O

[GLG fishing]

Re: '68 Holiday-V 120 Mercruiser I/O

If it were my motor I would drown the thing in ATF.
Let it sit for a day and try to turn it over by hand.
Drown it again and let it sit again.
Once it is freed up I would run the motor with ATF in the crank case.
I would put some ATF in a small fuel tank at 50 gas to 1 ATF.
Perhaps run it for 15 to 20 minutes.
After the clean out I would change filter and oil.
If the lifters and valves are still sticking I would do it again.

(Ed I was referring to ATF in the motor. Hope you a healing up buddy)
(Barato never head of mixing ATF and Acetone but it sound like a good idea)

GLG

 

[barato]

Re: '68 Holiday-V 120 Mercruiser I/O

yeah, i definitely meant Auto Trans Fluid....you don't want them guys from Alcohol Tobacco and Firearms sniffing around your life!

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

thanks for the great advice, unfortunately one of the valves is stuck all the way open due to me taping it with a socket and hammer (light taps)
I'm taking it to a friend that has the knowledge to see what's what, He will look at it with in the next 2 weeks of so...


Regards,



Scott

 

[barato]

Re: '68 Holiday-V 120 Mercruiser I/O

Scott--

unless you mean that it's stuck open due to valve stem being bent, this doesn't change anything....you still just need to "ungum" the motor first, and then decide whether head needs to come off etc. you might be pleasantly surprised.

 

[Pugetsound]

Re: '68 Holiday-V 120 Mercruiser I/O

If it were my motor I would drown the thing in ATF.
Let it sit for a day and try to turn it over by hand.
Drown it again and let it sit again.
Once it is freed up I would run the motor with ATF in the crank case.
I would put some ATF in a small fuel tank at 50 gas to 1 ATF.
Perhaps run it for 15 to 20 minutes.
After the clean out I would change filter and oil.
If the lifters and valves are still sticking I would do it again.

(Ed I was referring to ATF in the motor. Hope you a healing up buddy)
(Barato never head of mixing ATF and Acetone but it sound like a good idea)

GLG

Have the big winds blown anything away in the Vancouver area yet. Really look forward to a rough winter YIKES ED

 

[starcrafter65]

Re: '68 Holiday-V 120 Mercruiser I/O

As an owner of 1968 Holiday I/O - I would say this.....wrestling with an old motor can be costly.....I would be on the hunt for a transplant. I found in short order a 3.0 Liter that had a crack in the water jacket - I fixed it with JB and it has run perfect - price $375. Plus I got the 20 extra horses.

Around here in WNY 3.0's from rotten glassers pretty much go for 300-500 bucks....done and done.

Your boat is EXACTLY what mine once was.....pretty cool

 

[CheapboatKev]

Re: '68 Holiday-V 120 Mercruiser I/O

yeah, i definitely meant Auto Trans Fluid....you don't want them guys from Alcohol Tobacco and Firearms sniffing around your life!

Ya no need for a ride in the Crown Vic

 

[CheapboatKev]

Re: '68 Holiday-V 120 Mercruiser I/O

Scott--

unless you mean that it's stuck open due to valve stem being bent, this doesn't change anything....you still just need to "ungum" the motor first, and then decide whether head needs to come off etc. you might be pleasantly surprised.

And you wont know that unless you give the ATF or lube of your choice a shot

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

I'm just going to have the head removed.

If i crank the engine with the stuck valve pushed all the way down (spring is completely compressed), the piston will get damaged and or bend the valve.

Once again thanks for your suggestions

Scott

 

[Pugetsound]

Re: '68 Holiday-V 120 Mercruiser I/O

Removable of the head a wise move then you can do a lot of things before it is replaced .

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

Removable of the head a wise move then you can do a lot of things before it is replaced .

Indeed simple stuff 1st

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

Well I went to look at my boat today as I was in the area, The head has been removed and the valves and will need to be replaced. There was a little rust in cyl #4 but after cleaning it up it should be ok.
Stern drive is off and it in pretty good shape The Yoke Assembly had been immersed in water so they are shot. According to my Friend that is

Sorry no photo's I don't have a camera on my phone, as I work in sensitive area's in the automotive industry...

Regards,

Scott

 

[Kainon]

Re: '68 Holiday-V 120 Mercruiser I/O

Hi, hope I'm not to late, to me the valves would only need to be replaced if they're damaged, bent or heads/faces badly damaged. Can usually remove, clean them up. A Basic "valve" job would be to either KNURL or install new guides, reface the head side of the valves, ( 3 or 4 angle valve job ) I would also think about having hardened seats installed, as you probably can't get any leaded gas or additive (illegal in US) to help protect the exh valve seats.

As a side note I had a 120hp '67 Merc bored .030 over size, compl valve job, CompCams 260H ( shoulda gone for the 240H ( more like the marine ) New Intake and carb, thing ran beautiful !!! was in a non-tin boat. '67 Glastron V-174 ( which the Bat Boat was based on cept the Bat boat had the BUICK V6 )

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

Well I finally got got my boat back $1200 for parts $2000 labor. I figured I got the Boat for free why not spend some $ to have a Marine Mechanic to fix it. that way I can concentrate on the cosmetics.

Qty Part # Discription
1 2632511 A1 Seal kit
1 2633144 A2 Seal
1 77481 shift rod
1 60932 A4 Bellow
1 18654 A1 Bellow
1 865436 A3 Inner shift cable
1 32-32461 Water Intake Hose
1 35-33744 Fuel Filter
1 27-34213 Gasket
1 32-69871 Trim Hose
1 32- 45973 Trim Hose
1 32-45974 Trim Hose
1 32-45703 Trim Hose
1 45566 clapper
1 27-34273 Head Gasket
1 27-52546 Intake Gasket
1 27-33680 Thermo Gasket
Hose
Spark Plugs
Fuel Hose
Used Elbow
Elbow gasket
Bilge Pump
Bilge hose
Gear Lube
Recondition Head 2 valves and 2 seats
R&R Engine (Cylinder and walls good, rings fair to good)
Reseal sterndrive (New complete water pump and Impeller + seals )
Tuch up paint on sterndrie and Prop'
Tune Up
Winterizing
Replaced both U-Joints and Yoke

Here are some photo's of the bad parts

Rusted elbow

Seized gimbal bearing, Shift rod and cable

U-Joint Bellows

Deformed Impeller

All parts that I got back all original (did not want to take a chance with 40 year old rubber parts)

All put back together and sealed and tested.

regards,

Scott

 

[jasoutside]

Re: '68 Holiday-V 120 Mercruiser I/O

Yikes!

Well Scott, I have to say, you took that pretty well.

I would have thrown a big tantrum!

I am sure you'll be feeling pretty confident on the water though, eh!

Cheers!

 

[fshngho]

Re: '68 Holiday-V 120 Mercruiser I/O

Welcome to the World of Boat Ownership,
The good news is you shouldn't have to worry about the motor next summer! You can concentrate on the boat resto with one thing off your mind.

 

[TheWrks]

Re: '68 Holiday-V 120 Mercruiser I/O

I would rather spend the $$ than me mess something up and have the boat brake down in the middle of Lake Huron or Erie and have to deal with the "ball and chain' chewing my ear off

 

[fshngho]

Re: '68 Holiday-V 120 Mercruiser I/O

You have been trained well young grasshopper. Your life and happiness is not worth a few bucks
A ball and chain works too well to bring you to the bottom of the lake.

 

[Bwana Don]

Re: '68 Holiday-V 120 Mercruiser I/O

I would rather spend the $$ than me mess something up and have the boat brake down in the middle of Lake Huron or Erie and have to deal with the "ball and chain' chewing my ear off

A piece of mind is worth something. Bad things can happen offshore in the Great Lakes. I really hate "I told you so".

 

[sprintst]

Re: '68 Holiday-V 120 Mercruiser I/O

All the innards are up to snuff now. Better to do it now than when each component is a problem later.

Nice work. Just checked out the new gas tank

We're getting closer every day.