Tohatsu motor

Yep, used to be guys would mix one can lean for tolling and one a little richer for running.

It "used" to be standard practice, and even recommended by dealers if you were trolling at low rpm's for hours, to mix a leaner fuel/oil mix. Just remember to switch back to your running tank. You will foul plugs running at low r's for long periods, even at recommended mix ratios but especially if you're putting extra oil in. That's why they eventually went to oil injection systems, they lean the oil out at low rpms and increase it at high r's.

The recommended mix is an all around mix. The key is that a 2 stroke gets all of it's piston and crank bearing lubrication from the oil in the gas, so it could get ugly if you lean the mix out too much. Big thing is I would not mix it richer than recommended unless I was running at full throttle constantly, like on a punkin seed racer. Synthetic oil might be a better option that would cause less fouling as well.

IMO, if you are doing alot of trolling, i would not have upsized the carb. But that is besides the point.

But if the gas/oil mix is in the ball park you should be fine. You may need to blow the carbon out every so offten. Alo run a fuel cleaner, like seafoam, or quickleen from mercury, and stabil eathonal treatment. Those could be your biggest down fall is fuel.

ORIGINAL: fcflyguy

I have a 86 or so 9.9 Tohatsu that has had a up sized carb and the prop pitch chaghed to a 18 hp I belive Iam real happy how it pushes my boat(16ft deep v) 2 guys and gear it goes 16 to 18 mph the last two times out its took a while to start and sound like it has a slight miss at idle and low rpm I put to new plugs in it today and mixed up a couple of more gals of gas for it
(I think it was mixed up on the rich side thinking rich is better than lean side) my ? is i been doing a lot of trolling about 1.8 to 2 mph will this faul the plugs easy? will taking her back on on the water soon
THANKS FC

The short answer is: Yes, your plugs will load up when trolling for extended periods. Try a synthetic 2 stroke oil. It will load your plugs up less, give you the best protection under all operation ranges. Pennzoil full synthetic has been great to me the last couple years.

put new plugs and feul in and put the ears on it run and started great took out to the water ran for a min shut off and could not start again was not getting any spark?????????????????

FC

To check for spark
Remove sparkplug cable
Have someone you do not like hold a screwdriver inside boot at end of wire.
Turn key
If he screams you have spark

no spark at plugs

Check and see if you have spark from the coils. If you do, the problem most likely is most likely your mix or the plug type. No spark at plugs and having spark from coil indicates fouled plugs usually due to too rich of a mix or in proper plug type.

ORIGINAL: fcflyguy

no spark at plugs

Glad to help out. PM me again if you have any other questions.