Hi All,
This is my first post to the forum and like many newbies We (Wife and I) have just purchased a new to us sailboat. Specifically a 1976 30' C&C MKI which has an Atomic 4 engine in it. Engine hours unknown - there are two removed engine hour counters, both over 4000 hours. Not sure which belongs to the boat (maybe both?!).
Please note that neither of us are that mechanically inclined but have some experience with mechanical things ie. lawnmowers etc..
The Engine is currently running however we have some concerns for its condition and reliability on a going forward basis. Issues we have are:
1. We are getting significant amounts of fumes whilst it is in operation
2. We are getting significant amounts on fumes when it is sitting at the dock for a couple of days
3. The previous owner did some jerry rigging of the thermostat to the point where he put a manual valve in to control the temperature, then ran it at approx. 140 degrees F.
4. We have some significant corrosion on the of the engine pictures attached.
5. There is a fair amount of chugging on startup. Takes a while.
We have just done a cold compression test and the results were on cylinders 1&2 were at 115 psi. Cylinder 3 initially was 80, I tightened the compression screw and tried again and got 95 ish, I then tested the 4th cylinder and we got 105 psi. I then put a little bit of motor oil into the cylinder from the sparkplug hole and retested the 3rd cylinder and got 95ish again. So am thinking we have a sticking valve, no?
As a result we are thinking we will pull it apart over the winter - have the engine cleaned and honed and then rebuild. We have already purchased the overhaul manual and parts list from Moyer, however any advice of the things we should do would be appreciated.
We will likely be putting a electronic ignition and fuel pump in anything else we should be planning on doing/adding to the actual engine itself? Possibly alternator?
Attaching pictures for reference!
Thanks for your thoughts.
Regards,
Philip
This is my first post to the forum and like many newbies We (Wife and I) have just purchased a new to us sailboat. Specifically a 1976 30' C&C MKI which has an Atomic 4 engine in it. Engine hours unknown - there are two removed engine hour counters, both over 4000 hours. Not sure which belongs to the boat (maybe both?!).
Please note that neither of us are that mechanically inclined but have some experience with mechanical things ie. lawnmowers etc..
The Engine is currently running however we have some concerns for its condition and reliability on a going forward basis. Issues we have are:
1. We are getting significant amounts of fumes whilst it is in operation
2. We are getting significant amounts on fumes when it is sitting at the dock for a couple of days
3. The previous owner did some jerry rigging of the thermostat to the point where he put a manual valve in to control the temperature, then ran it at approx. 140 degrees F.
4. We have some significant corrosion on the of the engine pictures attached.
5. There is a fair amount of chugging on startup. Takes a while.
We have just done a cold compression test and the results were on cylinders 1&2 were at 115 psi. Cylinder 3 initially was 80, I tightened the compression screw and tried again and got 95 ish, I then tested the 4th cylinder and we got 105 psi. I then put a little bit of motor oil into the cylinder from the sparkplug hole and retested the 3rd cylinder and got 95ish again. So am thinking we have a sticking valve, no?
As a result we are thinking we will pull it apart over the winter - have the engine cleaned and honed and then rebuild. We have already purchased the overhaul manual and parts list from Moyer, however any advice of the things we should do would be appreciated.
We will likely be putting a electronic ignition and fuel pump in anything else we should be planning on doing/adding to the actual engine itself? Possibly alternator?
Attaching pictures for reference!
Thanks for your thoughts.
Regards,
Philip
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