Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

[mrshanno]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

ok, I have the stock "air cleaner assembly"...It didn't come with foam in it, so I put some briggs and stratton foam in there, probably restricted air flow. I'll try it with no foam.

 

[barefoot lester]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

I have the exact same problem with my gamfisher 3.0. I have tried everything. Bypassed petcock, new fuel lines, new tank, cleaned carb numerous times, checked carbon buildup, replaced sparkplug, tried different fuel ratios. Does the same thing with fuel cap on or off. I'm gonna drill a hole in the cap just to see, but I doubt that will work. Last option is the magneto, but the problem just seems fuel related. It just acts like it gives out of gas at max throttle. I haven't messed with it in a while, but this post will have me back at it for the 6th time trying to get this thing running. How is something so simple, so aggrevating?:facepalm:

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

Hey there,

I have a 3/4 hp air cooled Tanaka Bumble Bee 945606 that does the exact same thing. It's not gas restriction, as it does run full throttle just fine, just not under load!!! That is to say, not when it is "hot"! I think it's not cooling properly and gets too hot under load! When I first start it (cold) it runs great, but I notice a change in pitch when it starts to get hot and once hot, it won't go full throttle. If spray mist (water) into the cooling blades, it will run better for longer, but still gets to hot and starts vaporizing the mist on contact. I think there is something restricting air flow and it's over heating. I'm going to try removing the heat guard hood over the engine to see if it cools (breaths) easier?

What do you all think? Could I be on the right track? Maybe?

)

 

[sentinel]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

I get mixed signals from you and the others with same problem. "Stalling out" appears to be both a flooded condition and a fuel starvation condition from their language.

In the first case, the petcock should not be flooding the carb. It implies the float valve is stuck open or is misadjusted. This could be flooding the engine at speed under load too.

To eliminate whether these different "stalling" are from flooding or fuel starvation.....momentarily cap the carb with your hand when the engine starts to stall. If the engine picks up speed.....it is fuel starvation.
If it stops the engine quickly....you may be flooding the carb or the idle jet setting is overriding proper main jet air fuel ratio.

Incidently, This quick momentary "capping" is an excellent way to clear main jets of loose material which can clog the main jet from time to time. It must be done with engine running at speed to be effective.
-Larry

 

[sentinel]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

Forgot to add this....

The 3 HP gamefishers ARE NOT DESIGNED TO RUN FULL THROTTLE UNDER LOAD! They are a trolling motor for low to mid speed AND THEY WILL QUICKLY SEIZE from overheating!!! I personally do not use 50:1 with this motor nor do I use an intake filter. I add a tad-bit more oil to the fuel....to bring it closer to 45:1.

You will hear excessive ring noise when it is about to seize too. -Larry

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

So!

No comment on it possibly be overheating and binding the piston causing a stall????

What about adjusting the High speed screw for more gas??

I did find that adjusting for more choke while going full throttle helps some, but it still stalled out. But now that I think of it, I can always restart by choking for two pulls and she's away again! So it didn't bind up and compression on pulls does feel the same!

Perhaps the gas filter in the tanks does not alow enough flow at high speed and that causes the stall?

I will remove the filter for free flow and see what that does!

 

[mrcrabs]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

I did find that adjusting for more choke while going full throttle helps some, but it still stalled out

clean the exhaust ports, there carboned up, and use a synthetic 2 cycle oil @ 50:1

she can't breath...sea foam the heck out of it...get it hot take out the plug and soak the cylinder with the SF, add some to the fuel mix and run it till she quits smoking...then put a new spark plug in.

 

[robert graham]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

I've run mine for hours and days at wide open throttle on the back of my fully-loaded canoe without any problems at all. Free fuel flow is very important on this motor. If your fuel lines are too small, kinked, restricted, pet-**** restricting flow, fuel tank vent not open, etc., can all cause it not to run wide open. It's an easy job to slide cylinder off to inspect and clean carbon off piston crown, un-stick piston rings, remove carbon from exhaust port. Easy! Good Luck!

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

In my case the high speed pin hole in the carb was clogged, but the low speed was not. This caused the engin to operate normally at low speed, but when you went to high speed as in accelerating, she died quickly. Also she ran very hot (lean) when trying to accelerate and of course could take absolutely no load as running hot and lean had no HP at all!!! Stalled out very quickly. Chocking to get it to continue was only drawing more gas (max) threw the low speed pin hole. Not knowing mush about carbs when I started, I did not notice the second pin hole. There is one pin hole to either side of the butterfly when it is closed. The pin hole on the piston side (low speed) was clear, but the one on the air intake side (high speed) was plugged. I had to clear the plug twice while running lots of Sea Foam threw the carb. My engine has lots of HP now, running much cooler and not stalling out when ever I try to accelerate!!!

 

[robert graham]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

I've run my Tanaka 3HP for hours and days at wide open throttle with no ill effects at all. The only cutting out at higher RPM's has always been fuel restriction through that junky little petcock or fuel tank vent not open. Carbon can build up in the exhaust ports after a while, but very easy to scrape it off. There's a drain screw on bottom of float bowl to drain water/trash out of float bowl. Maybe your float bowl is out of adjustment with that little brass tab and starving engine at higher RPM's?...

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

Hey,

Discovered what was causing my stall out under load - gas starvation due to one of the two pin holes in my carborator being clogged up. It was the pin hole on the piston side of the butterfly that was clogged and this caused my engine to run hot (gas starvation) on full throtle, but because there was absolutly no power there, any load would stall the engine out. I didn't know there was a second pin hole, till I poked at this little black spot! If my engine propeller was out of water, it would appear to run normally at high speed, but HOT! Soon as I put it in the water ..... stall!

Works like a charm now!

Later,

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

Well I solved this problem with my little Tanaka Bumblebee!!!

There are two venturi pin holes, one to either side of the butterfly choke!
The one outside the butterfly (air filter side) is clogged with carbon and needs to be cleared using a piece of fine wire!

When you throttle up your choke should be open and drawing extra fuel from the second pin hole, but it can't and so stalls!

FYI,

Wayner

 

[broughwa]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

Anybody know where I can get a replacement prop for my little Tanaka Bumblebee 3/4 HP model# 945606

 

[WIMUSKY]

Re: Tanaka Gamefisher 3HP chokes out when I go to full throttle...any ideas?

broughwa, this thread is over 90 days old and is considered "dead".

12. Please do not post to threads that have been inactive for more than 3 months UN-LESS you are the original poster. We have very active forums and any thread that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old thread. This is considered a hijack. Please start a new thread of your own.