Hi, I bought my Slayer Pro 4x4 about a month ago. This is my first RC and first Nitro engine.
I broke in the engine according to the manual and it was great! My temps ranged between 220 F and 280 F. Soon as it hit 280 F I would richen the mixture. I was worried when my temps reached 300 F. It still had nice smoke so the engine is still being lubricated. It was beating some 1/8th models with big blocks! It had torque and it's speed was awesome! I also liked how it almost sounded like an F1 roaring down my street!
It all went to crap when I heard a bad noise coming from the engine...
It sounded like some kinda clattering/grinding noise.
Here's some issues I had with the truck.
- throttle servo was glitching during break in (replaced it)
- carb is sticky (when I pulled on the throttle the carb would stick near the beginning of the slide.)
- 2 weeks after and 1/2 a gallon the engine was making a weird grinding noise.*
Someone at the local track told me that it's the one-way bearing that supports the shaft connected to the EZ start assembly. Apparently it's a common problem for these bearings to go out. I was told that the EZ start is part of the problem and that it puts unnecessary load on the shaft. Hence the reason why the bearing went out.
I was told that I should order the bump start engine next and that it should fix my problem and that it will give me 20% more power and a better weight ratio as a bonus. I was given this advice from someone who owns 3 models with the same TRX 3.3. He said he kept having the same problem and that he went through a couple engines because of that bearing...
He runs his models hard and he's serious about racing. He posts great times on the clock with his slayer too but when I heard that he had gone through 14 engines, I was skeptical. I am a diesel mechanic so I understand the whole concept of compression engines. When it came to tuning it I found out that they are a totally different animal than the diesel engines used in the transport industry.
The engine was great until it started to make the sound. Soon after I knew that it was definitely the bearing because I started to see shrapnel in the fuel that was exiting the exhaust and I could feel the vibrations traveling through the engine on the head and through the easy start.
Should I really blame the EZ start and that shaft it needs to spin the engine?*
The EZ start is convenient and I was even thinking about installing a remote starter but if the one-way bearing keeps breaking then I may have to consider some options.
A bump start isn't a bad idea if I want more performance but the remote starter is convenient.*
Should I go with the bump start to avoid this apparently "common" issue?