K&B 45 red head

[XtremeRcBoats]

Recently I got a k&b 45 red head in another christmas giveaway. I opened it up and the crank and back plate has some corrosion on it. What is the best way to remove it, use some scotch bride or wet sand it?

When I removed the head button I didn't pay attention how it was mounted, which side should face the exhaust port, the side with 5 notches?

Tnx

 

[FloridaScaleBoater]

small brass wire brush and some WD40 will remove the corrosion

As far as the head button,,, you got me, maybe Terry Keeley will chime in,,, as it looks like one of his Turbo Heads.

 

[moparbarn]

That is the stock k&b head button, 5 notches to the exhaust.

 

[RonShaw]

Recently I got a k&b 45 red head in another christmas giveaway. I opened it up and the crank and back plate has some corrosion on it. What is the best way to remove it, use some scotch bride or wet sand it?

When I removed the head button I didn't pay attention how it was mounted, which side should face the exhaust port, the side with 5 notches?

Tnx

Paul.

Usually rust on the crank and PTO drive means rust on the bearings as well. Do yourself a favor, and replace the bearings while you have it apart.

 

[FloridaScaleBoater]

Recently I got a k&b 45 red head in another christmas giveaway. I opened it up and the crank and back plate has some corrosion on it. What is the best way to remove it, use some scotch bride or wet sand it?

When I removed the head button I didn't pay attention how it was mounted, which side should face the exhaust port, the side with 5 notches?

Tnx

Paul.

Usually rust on the crank and PTO drive means rust on the bearings as well. Do yourself a favor, and replace the bearings while you have it apart.

+1

 

[Terry Keeley]

small brass wire brush and some WD40 will remove the corrosion

As far as the head button,,, you got me, maybe Terry Keeley will chime in,,, as it looks like one of his Turbo Heads.

K&B's copy of our heads, the side with 5 notches goes above the exhaust.

 

[RobertSandera]

Couple things you can do

OMC or Yamaha engine tuner to eat the corrosion

Marvel mystery oil soak eats corrosion spin bearings in it too with wire wheel

Electrolysis clean with battery charger pos to part neg to a pice of tin put dish soap and baking soda in water but may blacken part

Dish wash scotch rite is non scratching

 

[Matt Minassian]

It looks like a piece of junk, you should just sell it to me for $200

I agree with Ron, I would definitely replace all the bearings as well.

M

 

[XtremeRcBoats]

Tnx guys. I'll look at the bearings. Do you know what numbers they are, and are they the same as the normal k&b 45's? maybe I got some l lying around.

About the head, Terry I've only seen your design in K&b's. Was it also tried on other engines / sizes? In the other engines I have (Mac/CMB/NR, 21 to 90's) I've only the normal style head button.

 

[Matt Minassian]

Contact John at technology hobbies I believe he has the bearings in stock

 

[Terry Keeley]

Tnx guys. I'll look at the bearings. Do you know what numbers they are, and are they the same as the normal k&b 45's? maybe I got some l lying around.

About the head, Terry I've only seen your design in K&b's. Was it also tried on other engines / sizes? In the other engines I have (Mac/CMB/NR, 21 to 90's) I've only the normal style head button.

We stopped making them about 10 yrs ago so just some of the older motors left, OPS, K&B, Picco.

Think Gary might have some NR RXM 21's left, 630-279-2451.

 

[XtremeRcBoats]

Terry, will these NR's fit the newer engines. I've got a NR 35+ engine and would be interested to try it. What gains did you see when you were making them back in the days?

 

[Terry Keeley]

Terry, will these NR's fit the newer engines. I've got a NR 35+ engine and would be interested to try it. What gains did you see when you were making them back in the days?

Not sure, they were for the RXM "long stroke", bore was 0.629". You'd have to check.

Typically guys gained a couple mph, except the K&B21, anywhere from 5-10 was the norm.