As far as I know, and have done in the past, is to fit a Lister HR2/3 starter motors to Lister JP engines, since the gears are the same as the JP on the HR it should fit with out any issues considering the correct rotation is used, the mounting bracket should be the same as well although a spacer ring may be required to set the motor at the correct depth for the ring gear on the flywheel.

One thing to check for that no one has stated yet is are you sure the voltage is correct for the motor, Some motors I have seen fitted to the JP range of engine are 24V rather then 12V since these are big engines the 24v motor requires less amps than a 12v motor and hence means the wire used can be of a smaller gauge then if it were 12v, there should be some numbers stamped on the motor casing, as well as a rotation arrow to denote the rotation that the motor is turning, If you can find them and post them here or even a photo of these numbers and a general photo of the motor I am sure we can tell you what motor you have currently fitted to your JP2.

Some times I have seen a Lister S series motor fitted to the JP range and these can do the job but are under-powered for the task.

the other option of course is to just stick with the hand starting, no more electric starting issues. 

LW

More photos from today's Cylinder head work.

LW

G'Day LW,
Good decision with going back to standard bore size and for further options way down the track. Nice job cleaning up the parts. Consider no grey primer and using either engine enamel on bare metal or 2 pack paint as the primer / under coat is not heat resistant and will burn off on the engine block and head areas.
As for using a flat, satin or gloss finish this is your choice as it is you project. The only benefit I see in using gloss is it is so very easy to clean up if an oil leak happens. A bit of degreaser and a hose and it is done. Flat finishes hold dirt, dust and oil.

Good evening Cobbadog.
Considering the primer I am using comes from CraftMaster Paints, and it is of the Two-Pac epoxy type it is heat proof and is sold via craft master as engine paints so I am fairly sure that it will survive the conditions this little SR2M will have to operate in.

As for going back to standard size with sleeving the cylinders, it was decided that while going over-size was a possibility it would make better and more sense to go back as it allows the cylinders to be resleeved as many times as needed over the next 50 or so years that this engine will hopefully see.

for cleaning up the parts I am just using a good quality shot blasting cabinet fed via a Lister SR2 compressor set with a BroomWade pump via quad belt drive, This unit runs at 1500 rpm and produces somewhere in the region of 100cfm at 350psi, perfect for shot blasting that needs volume over pressure but also to blast the parts after being cleaned with air to remove the dust before being painted in the CraftMaster primer, dust looks bad in a paint job personally.

Thanks
LW

Continuing on with the Lister SR2 yesterday, I have managed to shot blast the air intake manifold, The Oil bath air cleaner, exhaust manifold and have managed to give them all a coat of Gray primer, I am debating on making this a glossy coat or just a bare matt Gray.

Today I be making a start on the cylinder heads and rocker covers, while I wait for the cylinders to come back from the machine shop after taking the option to sleeve the cylinders rather then re-bore them over-size and to fit standard size pistons (Makes them rebuild-able over and over again  )


Thanks for reading.

LW

(Really hope these images show up, Never used embedding before.)

Good morning all.
I recently Picked up this battered old SR2 marine unit, its very battered and doesn't run, at all, Since I got it I have started stripping it down and have found the bores and pistons are "20 thou" oversize and the big end shells are "10 thou" oversize.

I suspect that that the crank will need grinding down to "20 thou" undersize and the bores in the cylinders will need taking to "30 thou" oversize.

I have a mechine shop that can do these jobs for me but they have said I would need to supply the pistons for said cylinders, I cant find any good quality pistons out there that are "30 thou" oversize, I have found "40 thou" and "60 thou" oversize pistons but nothing in between, Whats the reason for this or is it just not worth making odd size items for these engines.

As for the rest of the engine, I intend to build it up to an as new standard, obviously in what I understand is Traditional Lister Marine Gray.

For cleaning up all the parts I am going to clean up all the items in my sand blasting cabinet (Powered by my SR2 compressor set)and then mask and spray them in CraftMaster engine paints.


I am very much looking forward to jumping in and getting this project underway and I really hope anyone who reads my posts finds them enjoyable and informative.

LW