Replacing / rebuilding Perkins Perama

When you say rebuilding, do you mean a complete overhaul or just a general stripdown and decoke etc?
I have a manual for my parama M20, which is the 103-06, and I thing 20hp. It also covers the 103-09, and 103-10, M20-M30.
Would it not be much cheaper and less hassle to overhaul it than to buy and fit a new one? they are quite a basic engine, I am assuming yours is the 3 cyl.
Good luck with it.
 
I am erring towards the rebuild, but could be tempted if I could find a new one at the right price --- there's a rumour that there may be some MOD surplus ones at quite a good price.

Only problem is that they are not around until the end of January /forums/images/graemlins/frown.gif

John
 
John.
Can you not wait until then? it might be worth the wait, as they are normally well looked after.
Can you let me in on the secret of where abouts they will be comming available in Jan, btw are they marinised?
 
My understanding is that the top end of the engine is the one that takes most of the wear. Of course if the sump is corroding etc then it's not just the top end that needs attention.

14 years is not a disqualifying age. I admit the heat exchanger, water pump etc are likely to be past their prime, but a total replacement seems drastic, in the absence of indicators that "it's the last season" for this motor?

Given the probable need to marinise the replacement engine on offer (?) and the dismantling from removing the old engine etc would it pay to at least have the cover off and an engineer assess the state of the present (faithful?) machine?

PWG
 
My feeling is "If it ain't broke..."

But if it is, do your sums for spares carefully, add at least twice your worst estimate for labour unless doing it yourself, then remember that the injection pump could go next week. (the one on my car just died, £700 to put it right - ouch!) If this makes a new engine look attractive, remember that if you can get another Perama, the marinisation bits from your old engine could probably be used.

OTOH, a different engine may involve new engine beds, prop shaft and prop. - another think of a price and double it job, not to mention instrument panel, etc.
 
I looked into the cost of a professional rebuild of my 29HP, 19 year-old, >6000 hour, Perkins Perama earlier this year, and compared it with the cost of a new Yanmar 29HP (more or less an identical 3 cylinder engine - wouldn't be surprised to find that both blocks had been built by Kubota).

Something like 45% of the cost of installing a new engine was the installation itself. To take out, strip down and rebuild the old one, I estimated that I would have to spend nearly two thirds of the cost of installing a new engine. Then I thought about the comparative resale values and bit the bullet. The shame was that the gearbox was only 3 years old. I got £180 for the old engine and gearbox, but reckon I could have got more if I had the energy to clean them up, move them out of the yard shed, photograph them, stick it on eBay, faff around with Paypal, etc., etc.
 
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