Righto guys,
Now I know better but will explain the situation and then appreciate others feedback.

Cyclone Gabrielle did a wee bit of damage to my folks driveway and last month made the decision since insurance resolution / EQC is a good 18months away to attempt to get the boat down the drive.

Successfully managed to not write off my ute and no damage was sustained to the boat.

There's 100l of fuel which 70l was 100 octane from Nov last year from when I last used it, and then the old boy had topped up 30l after his last use with 95 octane fuel.

Ive tugged the boat from Whangarei back to Hamilton. Batteries have been on trickle charge.
I'm struggling to work out what to do with the fuel in the boat. I did start it the other night and let it run in the driveway for 30minutes. Seemed fine.
Seriously considering burning all 100l then servicing the outboard completely.

There is two sets of fuel filters and a water fuel separator before the mighty 100 horses take a guzzle.

What would you do? Have a lifetime supply of lawnmower fuel or just run it through?

4 Stroke DF100B

Forgot to mention due for it's service on time (obviously) and in 3hrs use.

4 stroke ,100octane with a mix of 95? be tempted to use my self

JustAnotherSpearo wrote: I think from memory their 95 option didn't pump and their 100 octane was cheaper than others 95 and the Hamilton NPD is extremely boat friendly compared to the other options along te rapa. Also just wanted to see if it made any difference which it did not. Owners manual states 91 minimum I think

I know the Npd in Te rapa,handy. I use the one in Wiri Manukau for my 95 just around the crn from work  95 $2.93 my local Z $ 3.21

I'd use it I've done worse. 

Appreciate the replies. Think I'll just send and hope I don't require use of the cost guard membership.

Considering maybe taking the partner to Taupo for a weekend getaway with the boat in tow for something different. Will see, won't be this weekend. Kawekas are calling for a walk

The thing with the 100 plus stuff is that it keeps way better   so while it might cost more  your not faced with feeding it thru the mower . NPD 100 plus does not contain alcohol. 

smudge wrote: Mc Tool wrote: The thing with the 100 plus stuff is that it keeps way better   so while it might cost more  your not faced with feeding it thru the mower . NPD 100 plus does not contain alcohol.  It takes me 4 fishing  days out to burn 25l of fuel  and I got sick of tipping it in the car if it ( 91 ) had been sitting for a while  so for 30c more a litre I mostly get 100+.If you use enough to keep the fuel flowing , so to speak then 91 is the best value. I have had personal experience with running to lower octane in a 2 stroke outboard, melts pistons instantly .....didnt even get out of the hole  ( 70 hp johnnie,   bit of a storey if ya want it )  Compression ratios in 2 strokes are a bit difficult   as while they may have a low static comp ratio  the effective ratio goes up a lot when at  peak torque   as with the 2/ the incoming charge is precompressed in the crankcase and is blown thru the transfer ports into the combustion chamber , where as the (na ) 4/ has to suck the incoming charge in. 2/ motors dont like low octane ....like stale fuel and will munch a piston pretty much instantly the load come on , usually melting the edge of the piston adjacent to the ex port  , sometimes just the top ring land  but I have seen rings totally unsupported  as the whole side of the piston has gone .   Smudge , I can save you a post ..... the piston was still oily everywhere except where it had actually melted. While most modern cars will take 91  my  Toyota recommends 95  and the difference in power is very noticeable if I use 91 . I think   the knock sensors cut in and dial back timing and fuelling more than the actual fuel makes the difference . I did try a tank of 100+ but the only difference  I could see was that it used more of it.  I have a Capri ( 3.9 rover  efi ) which due to a miscalculation on my part when dialling in the comp ratio  clatters badly on 91  better on 96 but still had to take 4deg out of the timing and it only rattled when the boot was down . So av gas or racing fuel was the go  which was a pita coz you couldnt pump it straight into the car  , so when BP ultra 100 showed up at the Cromwell garage .....nirvana,  then 100+  got local . Whole different car .  Makes sense Mac

Mctool would be good competition for "Steps" 

Well with all the discussion I decided to tip the boat fuel into the car ( 3 months old 91 ) and I had an epiphany ( think that's what it's called ) ,dreading the prospect of standin on one leg trying to juggle the fuel container and funnel I thinks , after way to many years "mmmmm I wonder if the snorkel of my mower fuel container would fit the boat tank" thusly avoiding afore mentioned juggle .....and
it 🤬 did 🤯 😁

I think one of those battery drill powered pumps would be the go .....40 bucks get you one that pumps petrol