Should I replace engine

[prv]

So here's an idea. Change the oil and go out and thrash the pants off it for at least four hours. If it doesn't blow up then it's good for a good few more years. If it does then the decision has been made!

Thrashing it at max revs, throttle on the stop, for half an hour will probably improve it. I used to do that annually on Kindred Spirit's 2GM20 and it ran better afterwards. Burns out the carbon in the exhaust valves, manifold, and elbow.

The 2GM20 is only rated for one hour at absolute max; there's a lower "max continuous" speed to use for the rest of your suggested thrash about. But yeah, at the end of it the owner should be more confident, the engine raring to go, and the shiny one less of a temptation

Pete

 

[pioneer]

If the new yanmar is of the new type check where the filters, anodes etc are. From memory the older 1 and 2 GM range weren't too bad, but the replacement range have most of the filters towards the back of the engine - alright if you've plenty of access, but a pig if not.

 

[prv]

If the new yanmar is of the new type check where the filters, anodes etc are. From memory the older 1 and 2 GM range weren't too bad, but the replacement range have most of the filters towards the back of the engine - alright if you've plenty of access, but a pig if not.

Hopefully the OP will be keeping his perfectly good engine - but for the record it's generally possible to move filters to somewhere more accessible. I did just that with the Volvo D1-30 on Ariam - most of the service points are on the starboard side of the engine, but it's installed hard up against a bulkhead on the starboard side :hopeless:. I moved the fuel filter to the adjacent bulkhead I can reach, modified the dipstick tube to point forwards, plumbed the oil drain to a convenient place to plug in a pump, and fitted a remote oil filter kit. Obviously some parts are inherently fixed in position.

Pete

 

[Chris_Mardon]

If you have the spare cash go for the new engine otherwise clean up your old engine and spray a coat of Hammerite on it; it'll look just as good as a new one and you'll have 8000 Euros in hand to spend on something else that will go wrong.