help!
 

well i took my boat out the outher day and it started to cut out every like 20sec after chucking into water ? why is it doing this? the tank seems to be hole free the plug looks fine its just realing p*ssing me off going 10miles to not even drive it:( (soz bout language im just soo anoyed with this i feel like i wana smash it up)

RE: help!
 

Curtis,

With Nitro boats sometimes its not always startup and go.
what engine is it (size, IB, OB)?
Fuel use?
HSN and LSN Settings?

is the motor new?

you could be running too rich or too lean.
let us know.

Dan.

RE: help!
 

erm im new to this i try to explain .


its a 21 engine team infinty

it seems fine when runing on land but after in water dies..

RE: help!
 

be 4 u say its the prop it cant be beacse it runs for 10sec on high revs be 4 dieing

RE: help!
 

and btw the engine is fairly new and im using 5% nitro

RE: help!
 

If the motor runs fine on shore, most likely too lean.. When a load is placed on the prop, it's too much and the motor dies quickly. Richen up the HSN about 1/2 turn or more..

RE: help!
 

Try a little more nitro %, I haven't heard of boats running on 5%. Most RTR's use 15-25% per MFG recommendations, and alot of people use more than that. I use 50% on all my engines now so far, I am running a OS CVR .12 and soon will be running an OPS .40 and a K&B .21 . I would guess 20-25% would be a good place to start, make sure you are using marine fuel too (normally marine fuel has atleast 18% oil). Just like OB said if it runs fine on shore it is probably to lean, I have to bump throttle to keep my .12 running (once it hits the water there is no sign of rich). I have been at my local pond for up to 5hrs trying to get my boats to run correctly, put the boat in the water go 30 meters and dies (over and over and over, drives ya nuts.) It should look like its spitting fuel out the exhaust a little. Where are your needles set, low and high speed? I would try 2 1/2 on the high speed and 3 on the low speed and adjust from there (on the high speed I would be careful of going less than 2 out, you could be getting too lean). What boat is this?


Paul

RE: help!
 

Just because a prop can run for 10 seconds doesn't mean the prop isn't the problem, it could take 10 seconds for the prop to grab (you could be cavitating, boats not moving fast just spinning the prop). Is you prop sharp and balanced? Does trinity make a marine engine? Both the car .21 trinity engine's on tower say to use 20-30% nitro.


Paul

RE: help!
 

You are definately running lean and too little nitro. Was this fuel recommended by someone or was it a "I think I'll try this one" type of purchase? A low nitro content(0-20%) is normally good only for aircraft engines. What kind of prop is on the boat? In this I mean brand, material or anything else you can tell us. Have you done anything to the prop to sharpen or balance it? All of these can be causes of poor running. Something else you need to look into is finding a club so someone with experience can help you. We can only help you so much, while an on site helper/teacher can see what's happening and help you avoid some of the problems you're having.

RE: help!
 

beacse this is the uk we do not use hight % fuel do to the coldness of this country to much nitro will not burn up cus the conditions are to cold ,,, and the prop is the right size beacse a world champ recomended it as he had the same boat


i will try what you said on sunday hopefully it will work

RE: help!
 

I am not really sure where you got the information about cold weather from? Your average temperature ranges from 47f -38f in February to 67f - 55f in July, or 8c - 3c to 20c - 13c respectively (Highs - Lows). I live in Chicago and during the spring and fall Ive run my boat in 3c before using 30%, your high today is suppose to be 61f or 16c and I would be running 50%.


Paul

RE: help!
 

I ran 30% when it was in the 30s here...lost the feeling in one of my fingers for awhile...:)

Sean

RE: help!
 

isnt 50% a bit crazy tho? cudnt it make ur engine go caboom!!!

RE: help!
 

Curtis did you break the engine in first?
These engines are alcohol engines commonly called nitro they burn a mixture of methanol and some sort of synthetic/ and or caster oil and sometimes a percentage of nitro. I do not know about nitro boat engines but I have run buggy engines on 5% nitro content (mfg recomended 20% nitro) doesn't have as much power but it still runs fine. Marine engines should do the same but you may have to re-break in the engine at the 5% nitro fuel level and be patient with your H and L speed needles these engines are finicky.
Being you are in E.U you should find someone that runs boats there as most of them use low nitro percentage fuel.
Chris.

RE: help!
 

Only K&B engines go KaBoom! ;)

RE: help!
 

Usually the reason why people on that side of the Big Pond run a lower nitro content is because of the cost of it over there compared to this side.
I'm worried though that the fuel that you may be running is not meant for boat use. I do have to agree with the other that it sounds like thew engine is running too lean. On shore, when you give it some throttle, you should be getting a slight lag, not revving up quickly.

RE: help!
 

erm i dono i will test but im not useing more than 10% nitro as a modle boat expert says in this country you will not burn up more than 25% in this weather any more and the nitro will go out of exaust

RE: help!
 

Hmmm, that sounds a bit odd. I've run 50% in weather ranging from 55 to 100 F. Worked ok for me.

RE: help!
 

I ran 30% at -5 Celsius and also worked fine.

Dan.

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Down here, we hibernate at those temps. :D

RE: help!
 

LOL Chuck

I can't stop laughing, ROTFL :) :D:):D:):D:D:D:D