dannyual767
Well-Known Member
- Joined
- May 27, 2004
- Messages
- 633
Okay, I know this is a nitro forum but nitro sure is a pain! I've never had much luck running nitro but I love RC boats and I just can't give up on nitro.
Today was the first time in 6 yrs that I tried to start a nitro boat. I've got a Sullivan Model 4 starter hooked up to a car battery and a super hot 10,000mah D cell nimh glow starter. The boat is an old school Dumas SK Daddle that I had a lot of fun building. Engine is a brand spankin' new OS21RG-M with an OS #8 plug. I also tried a #3 as well as a McCoy 59. Pipe is a super quiet Irwin pipe. Super quiet! I know this is a small engine for this boat but I think Dumas' original intent was an engine putting out about .1 hp
:lol: :lol: .
Anyway, the OS instructions say to start with the needle valve 2 1/2 turns out so thats what I did. After about 45 mins, finally got the engine to start. It would run would the glow driver hooked up but the rpm would drop when I removed it. If I tried to open the throttle (even very slowly) the engine would die. Restart was usually difficult because the engine would flood and the belt would slip. Sometimes it would restart immediately, other times it would take 10 mins of fighting.
I tried leaning out the needle valve, all the way down to 2 turns out. It didn't change anything. I tried the two other glow plugs that I mentioned and they didn't help. The engine just won't run without the glow driver on the plug.
OS instructions say the cause is:
1. Mixture too rich
2. Mismatch of glow plug and fuel
On the other hand, the instructions say that the #8 plug is good with any %nitro fuel :unsure: .
This may be part of the problem: older 20% nitro fuel. However, it ran just fine in my wife's .61 size airplane engine.
Here are some pics so you can tell me if something doesn't look right.
As you can see, its not like my tanks are higher than the carb creating a siphoning effect, right? Why would my engine flood so easily?
And yes, thats a Hello Kitty bandage that my little girl put on the boat!
Today was the first time in 6 yrs that I tried to start a nitro boat. I've got a Sullivan Model 4 starter hooked up to a car battery and a super hot 10,000mah D cell nimh glow starter. The boat is an old school Dumas SK Daddle that I had a lot of fun building. Engine is a brand spankin' new OS21RG-M with an OS #8 plug. I also tried a #3 as well as a McCoy 59. Pipe is a super quiet Irwin pipe. Super quiet! I know this is a small engine for this boat but I think Dumas' original intent was an engine putting out about .1 hp
Anyway, the OS instructions say to start with the needle valve 2 1/2 turns out so thats what I did. After about 45 mins, finally got the engine to start. It would run would the glow driver hooked up but the rpm would drop when I removed it. If I tried to open the throttle (even very slowly) the engine would die. Restart was usually difficult because the engine would flood and the belt would slip. Sometimes it would restart immediately, other times it would take 10 mins of fighting.
I tried leaning out the needle valve, all the way down to 2 turns out. It didn't change anything. I tried the two other glow plugs that I mentioned and they didn't help. The engine just won't run without the glow driver on the plug.
OS instructions say the cause is:
1. Mixture too rich
2. Mismatch of glow plug and fuel
On the other hand, the instructions say that the #8 plug is good with any %nitro fuel :unsure: .
This may be part of the problem: older 20% nitro fuel. However, it ran just fine in my wife's .61 size airplane engine.
Here are some pics so you can tell me if something doesn't look right.
![IMG_6859.jpg](https://proxy.imagearchive.com/5da/5da9efba58e1996cdccfe21f09b8bc07.jpg)
![IMG_6857.jpg](https://proxy.imagearchive.com/8f6/8f6789c433ce8405e66d12eb68765fd1.jpg)
![IMG_6854.jpg](https://proxy.imagearchive.com/dcb/dcbe1f4f834d739cdb9a38e7cc795bd3.jpg)
![IMG_6853.jpg](https://proxy.imagearchive.com/dcc/dccfe4a393ebed38c06b2ea0efb12d50.jpg)
As you can see, its not like my tanks are higher than the carb creating a siphoning effect, right? Why would my engine flood so easily?
And yes, thats a Hello Kitty bandage that my little girl put on the boat!
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