Motor Mount Replacement


sbmesasailor
 

My 34 year old Perkins has lost a motor mount and I've never replaced one.  I presume the engine has to be lifted.  The motor mount is port side aft, can I get away with disconnecting the drive train and lifting just the rear?

Dennis Johns
Libertad
Maramu #121
Currently in St. Barts


Craig Briggs
 

Hi Denis,
I should think so, although I've not done it on a Maramu. You may even be able to do it without disconnecting the drive train, or even the other motor mounts, relying on the flex in the coupling and motor mounts to give you enough wiggle room to slip in the new mount. Although being the aft mount, closest to the drive coupling may not allow it. Seems worth a go and you can always disconnect anything that prevents doing so. Maybe Airops Dave or other Maramu owners can give you more precise input.
Sounds like a fun project - enjoy!
Craig Briggs, SN#68 Sangaris


---In amelyachtowners@..., <sbmesasailor@...> wrote :

My 34 year old Perkins has lost a motor mount and I've never replaced one.  I presume the engine has to be lifted.  The motor mount is port side aft, can I get away with disconnecting the drive train and lifting just the rear?

Dennis Johns
Libertad
Maramu #121
Currently in St. Barts


Andy Croney
 

Hi Dennis,

We have refurbished our old Perkins where by we had to remove the engine and then reinstall - all relatively easy due to the great design of an Amel.

From our experience you should be able to get way with it .

Good luck and all the best !

Andy
Paladin #75


Andy Croney
 

Hi James,

We carried out the work back in 2014.

We decided to keep and refurbish our Perkins, after we removed it to fix an oil leak to the front of the engine and after the compression test the mechanic advised us to go along this route. However we did underestimate the time it would take to source and get all the necessary parts and do the work - our Perkins was built under license in North America and has some exotic bolt threads to the oil filter holders. These bolts were difficult to source in our part of the world.

The following is not exhaustive and from memory, basically with the engine out we tried to replace all hoses, cables , gaskets , seals ( oil seal, intake and exhaust manifold gaskets , valve cover and oil pan gaskets , rear housing and head gaskets , water pump gasket etc ) pumps , thermostat, injectors plus housings around the engine block - - from timing gear housing and cover , water pump back housing. We also installed a new lift pump , crankshaft pulley , tappets and valves etc - Heat Exchanger tube stack and rubber fittings plus New engine mounts. The motto being this is the time to do it.

We also added two new Balmar alternators one dedicated to charge the start battery and one the house bank , the house bank charging alternator with a double pulley.

One thing we did not replace was the Heat Exchanger housing . This decision has come back to haunt me as on our last trip the manifold blew a hole - I am now in the process of sourcing a new housing ...... in hindsight this should have been replaced when the engine was out.

To date we are happy with our decision and believe the Perkins to be a simple , over engineered workhouse, where parts should be readily available for some time to come.

Trust this is helpful.

Should you need any images let me know and I can forward these to your personal email.

Good luck !!

Andy
Paladin Maramu #75


sbmesasailor
 

Thanks Olivier, I'm pretty sure it is just the rubber part that went away.  I was thinking that I could find some hard rubber and cut it to size.  Is there something special about the rubber part that I don't know?

Replacing all the mounts is a bigger job than I was hoping for on an engine that has over 10,000 hours on it.  How about if I just replace the two rear ones?

Dennis