I would like opinions from you boat wizards familiar with Zen and outboards.

My Nissan 3.5 drives my small Portaboat around nicely but its user
manual and the label on the fuel tank disagree. The manual tells me to
use 25:1 fuelil ratio and the label says 50:1. I've been running 25:1
because it's what I saw first. I don't notice significant smoke and
haven't had it long enough to foul the plug yet.

Any ideas on which way is best or whether this is even a subject worth
discussing? Thanks.

J. K. Smith wrote:
snip..
My Nissan 3.5 drives my small Portaboat around nicely but its user
manual and the label on the fuel tank disagree. The manual tells me to
use 25:1 fuelil ratio and the label says 50:1. I've been running 25:1
because it's what I saw first. I don't notice significant smoke and
haven't had it long enough to foul the plug yet.

Any ideas on which way is best or whether this is even a subject worth
discussing? Thanks.

My 1986 Evinrude Yachtwin manual says I can use 100:1 but the dealer
told me a service notice came out a year later advising 50:1. I'd stay
with the 25:1 until you talk to a reliable dealer.

I don't claim to know the direct answer to your question, but I can tell you
that I have been using 50:1 on ALL my two stroke engines ever since the oils
designed specifically for that mixture became available. Some of those
engines called for 25:1, but seem to run just fine on the 50:1, and for
quite a few years now. I would not use 50:1 unless the oil is specifically
designed for it.

BS

"J. K. Smith" wrote in message
...
I would like opinions from you boat wizards familiar with Zen and
outboards.

My Nissan 3.5 drives my small Portaboat around nicely but its user manual
and the label on the fuel tank disagree. The manual tells me to use 25:1
fuelil ratio and the label says 50:1. I've been running 25:1 because
it's what I saw first. I don't notice significant smoke and haven't had it
long enough to foul the plug yet.

Any ideas on which way is best or whether this is even a subject worth
discussing? Thanks.

(J. K. Smith) wrote in
:

I would like opinions from you boat wizards familiar with Zen and
outboards.

My Nissan 3.5 drives my small Portaboat around nicely but its user
manual and the label on the fuel tank disagree. The manual tells me to
use 25:1 fuelil ratio and the label says 50:1. I've been running 25:1
because it's what I saw first. I don't notice significant smoke and
haven't had it long enough to foul the plug yet.

Any ideas on which way is best or whether this is even a subject worth
discussing? Thanks.

I just looked at the on-line owners manual on Nissan's website
(www.nissanmarine.com) and the 25:1 is for the Break-In period ONLY. After that
it goes to 50:1. There's a couple of other articles on their "Tech Talk"
section that confirm this as well. Good info there, check it out.

"J. K. Smith" wrote in message
...
I would like opinions from you boat wizards familiar with Zen and
outboards.

My Nissan 3.5 drives my small Portaboat around nicely but its user manual
and the label on the fuel tank disagree. The manual tells me to use 25:1
fuelil ratio and the label says 50:1. I've been running 25:1 because
it's what I saw first. I don't notice significant smoke and haven't had it
long enough to foul the plug yet.

Any ideas on which way is best or whether this is even a subject worth
discussing? Thanks.

I would guess that during breakin 25-1 and using the new TCW3 oil after
breakin (not so new now) 50-1.