This will put additional pressure onto both the plug seat and the head. Your torque wrench will click later if you are using lube, i.e. Then, why wouldn't we always use it? Why NGK says that over-tightening could occur? This is exactly because it's easier to insert the plug. Less chance of thread damage, because it's easier to insert the plug.Both NGK and BRP are correct, but it's important to understand where the disagreement in these recommendations comes from.įirst of all, let's see what is good about using lube: It's ok to use the lube if you know what you are doing. I can guess at what those symbols mean, but it would just be a guess. Resultant reduction of frictional forces at the thread faces will render the torqueĬharts inaccurate and over tightening could occurįor what it's worth, the back of the spark plug box itself has this advice: NGK does not recommend the application of lubricant to spark plug threads as the.of the NGK catalog includes, among other things, this text: Apply LOCTITE 767 (ANTISEIZE LUBRICANT) (P/N 293 800 070) over the spark plug threads to prevent possible seizure.
My summer car how to install spark plugs manual#
The BRP manual includes the following text in the spark plug installation procedure: How do I clear the remaining lubricant from the threads in the head? BRP I'm hoping someone has some other reason or strategy to do one thing or the other.Īlso, suppose I opt to follow the NGK recommendation an use no lubricant. On the other hand, this is in a salt-water marine environment so I'm concerned that the spark plugs might seize to the head without the anti-seize lubricant. On the one hand, I'm inclined to omit the anti-seize lubricant to see if the ignition coils stay seated. (I haven't found any advice direct from Rotax but BRP owns Rotax and the BRP manual seems pretty complete for engine maintenance.)Īs you can see from the exerpts below, BRP recommend using anti-seize lubricant while NGK recommend against any lubricant. There is disagreement between the official advice from BRP and NGK on the matter of lubrication. I'm planning to install a new set of three NGK DCPR8E spark plugs in a Rotax 1503 HO in a BRP RXT-X aS 260. I used anti-seize lubricant on the currently-installed spark plugs. The procedure is basically the same as a Time- Sert, drill out hole, tap hole, insert helicoil, thread in new bolt.This is question came up while trying to diagnose ignition coils unseating.
Being in the industry for a little while I have seen time and time again, that cheaper is never better. The only advantage to a Helicoil I found, is that it is cheaper.
TLDR: Although many argue that JB weld can hold a spark plug in, as I expected, JB weld can not withstand the compression pressures of an outboard motor. There are several types of repair inserts, but we prefer Helicoils.Īlso to know, will JB Weld hold a spark plug? Or, as illustrated, you can insert a Helicoil. In fact, it may be possible to simply chase the old threads with a tap and clean them up. Thread one of the new plugs into the spark plug hole until you can no longer turn it with your fingers, then use a torque wrench to tighten it to the specification listed in your service manual.Īlso, can you Retap a spark plug hole? A: There are a number of ways to repair stripped threads.
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