Lifespan of a 4Stroke

[FNQCairns]

lifespan has gotta be as high as a well looked after traditional 2 stroke, say 12-15 years of average use, it's just to get the extra 10 years to 25 out of it the 2st rebuild will cost 2/8 the cost of a brand new complete 4 stroke which is the only truly cost effective 4 stroke rebuild.

So in theory after the purchase of a traditional 2 stroke all the extra fuel costs + the rebuild costs over 25 years of use is free! compared to owing a comparable 4st over 25 years...he he.

cheers fnq

[TheRealAndy]

My F50 has clocked up 500 hours. Just put it through the latest service and no problems at all. Been out twice since the service and already clocked up 11 more hours!!

[White Pointer]

G'day,

You don't see harbour boat taxi services in Queensland and Brisbane to the extent that you do around Sydney Harbour, Pittwater Harbour, Broken Bay, etc because of the nature of the waterways, the waterfront land area to live on etc.

But around Sydney the water taxis are a great business and do a roaring trade. Their engines are almost never switched off and they go like stink. I have heard that the engines sometimes outlast the boats which is 5 to 10 years, depending on what they hit! They are almost all Yamaha 4-strokes in the 115 - 130 HP range and they just get routine servicing.

It's a bit like Falcon taxis - if you never turn them off they go on and on and get bits replaced in no time flat until the body falls apart.

For us occasional users, we have to provide meticulous maintenance to our pride and joy because heating up and cooling down and drying out accelerates wear at a phenomenal rate.

I reckon that the best maintenance investment in a boat is a tank that you can lower the engine into and run it in fresh water and soluble oil. Nothing should ever rust, not even the sacrificial annodes.

White Pointer