Storing boat during winter

[smile0784]

I had my boats for 7 years now and my grandfather told me you should run the motor once every 2 weeks to keep the water pump moist and keeps everything oiled up.
Fuel wise petrol goes bad after about 3 months but can be rejuvenated by adding new petrol to it.
Best to keep stainless steel tanks full so less moisture builds up so less water in your petrol.

[cobby]

I'm not that mechanically minded but doesn't running premium fuels in 'dumb' motors risk burning out valves as they lack the electronic sensory to retard/speed up valve timing to compensate for the differing of combustion times between 91/95/98 or 'stale' fuels?

[frozenpod]

I've always filled my boat with 91. Have been told that outboards are tuned for the lower octane rating.

Correct mate my marine bloke said same also they mArine guys at my work said same

Sorry guys this is a common misconception.

It comes about from the difference between Ron and Mon fuel ratings used is the US vs here.

Most outboards whilst they will run on 91 are optimised for 95. Carby 2 strokes run noticeably better on 95 than 91 4 strokes with EFI it makes less of a difference but it is still there.

[frozenpod]

I'm not that mechanically minded but doesn't running premium fuels in 'dumb' motors risk burning out valves as they lack the electronic sensory to retard/speed up valve timing to compensate for the differing of combustion times between 91/95/98 or 'stale' fuels?

If tuned to the limit going to a lower octane fuel that is a risk. But not when going higher within reason.

If you went to the extreme of oxygenated race gas different story but not from 95 to 98.

[ducky]

Do you put 98 or 95 in?m
Been under the same impression cobby

[frozenpod]

95 normally and for long trips 98 as it provides better ecomony and extra range.

[frozenpod]

Battery give it a top up before use if it has sat for 1 month.

Fuel goes off quick these days I used to keep the tank full now I try to get it close to empty (I use a syfine to get what I can out and use it in the mower) so there is mostly fresh fuel for the next trip.

Also I only use BP premium or BP ultimate fuel.

I cant allways choose my fuel due to locations but why do you choose the bp fuels

Cheers bm

100 plus hrs of dyno tuning experience with different fules as well as track work.

BP Premium and BP Ultimate are both better fules than the equivalent from other brands in performance, knock resistance and shelf life.

It might have changed as I haven't touched a dyno in 5 years but after 5 years still zero ossues with BP fuel.

[Wolly Bugger]

95 normally and for long trips 98 as it provides better ecomony and extra range.

In my mercury 15 two stroke, the 98 not only gives a greater range, but higher top speed as well.

[4liters]

Seems like a lot of hassle to solve a problem that could be easily avoided if you never stop fishing

[repspec]

or...you know...go fishing! Still plenty of fish out there during winter!!!