Petrol v Diesel

[danielbroad]

A large part of the "cheaper to maintain" comes from the rebuild cost once you've worn the thing out - a 200hp petrol is a damn sight cheaper to rebuild / replace than a 200hp diesel.

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[Micky]

Yes that is what we were told at a local marina. Diesel engines are OK until they go wrong then it would cost a lot of money for a rebuild, but petrol engines are easy and cheap to repair. They also claim the modern petrol engine is safe, much quieter and just as economical to run....probably just sales talk.

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[paddywackcocker]

I think youl find that replaceing the petrol engine at leest two to one deisel, arfter labour costs and updateing to the new lump the expense of the deisel unit wins. Then take into account the economy wich marine petrol engines have not come up to there road equivelent the deisel wins again. As for clenleenes ok the petrol may win. and for noise they win. On the Deisel front With the rate of the new common rail deisel pump failures imm not so sure about reliabilility still some way to go. The electronic managment systems on deisels, well fine in a road vehicle with hills and stop starts all the time, but on a boat with salty atmosphere and the engine unit running at an almost constant. why do you need it, the difrence to the economy of the fuel used would be almost unmearsurable.

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[ari]

How many 1970's diesel engined boats are still going strong with their original engines, and how many 1970's petrol boats are?

Not an engineer so no idea why, but diesels do seem to keep on going provided they are maintained properly, petrols however seem to have a habit of expiring...

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[[2068]]

Part of it might be that most petrols are "raw" water cooled with hot salty water sloshing around the vitals, whereas most diesels have anti freeze mix in their jackets.

One thing I don't understand is why more petrols aren't shipped with closed cooling, despite it being an option.

dv.

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[alb40]

My late 60s BMC 1500 only gave up a month or so ago after all those years and 11500 hours on the ticker with no major work. Just Goes to show how only regular oil and filter changes keep them running practicaly forever

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