K&B 3.5 engine
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K&B 3.5 engine
Hi all,
I have a K&B 3.5 engine modified with tune pipe, it looks like I'm missing the tail piece. The large part of the exaust is 4.25" long (fron U elbow) and the outlet is 3/8" (10mm) ID. Anyonw know what the outlet size for a 3.5 should be? Also there is a conection in the engine block (looks like and is the same size as the water cool conections on the head) and I have a conection on the muffler (for the gas tank I guess) anybody know what the conection on the block is for?
Any help would be greatly appriciated,
Thanks,
Pete
I have a K&B 3.5 engine modified with tune pipe, it looks like I'm missing the tail piece. The large part of the exaust is 4.25" long (fron U elbow) and the outlet is 3/8" (10mm) ID. Anyonw know what the outlet size for a 3.5 should be? Also there is a conection in the engine block (looks like and is the same size as the water cool conections on the head) and I have a conection on the muffler (for the gas tank I guess) anybody know what the conection on the block is for?
Any help would be greatly appriciated,
Thanks,
Pete
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RE: K&B 3.5 engine
I knew you would ask for pics, this is my first time uploading pics, hope this works.
Rgds,
Pete
Also, in the middle pic notice a corner broke off on the mounting plate, anybody know where I can find a new plate?
Thanks.
Rgds,
Pete
Also, in the middle pic notice a corner broke off on the mounting plate, anybody know where I can find a new plate?
Thanks.
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RE: K&B 3.5 engine
some guys ran the pressure tap off the block to the fuel tank instead of off the pipe i used this setup when i ran a 7.5 k&b with an exhaust throttle
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RE: K&B 3.5 engine
What you've got there appears to new a later model of the Irwin quiet pipe. He tried 2 different outlets on the pipe, one with a tiny stinger and the other has 3 slits in the bottom of the muffled area.
The two pieces that I think that you're typing about should be one for the tank pressure fitting and the other is for bolting on a bracket to hold the pipe in place.
The OB motor mount looks like a Prather. Man, I hated those things! A Du-Bro or Octura is much easier to use.
The two pieces that I think that you're typing about should be one for the tank pressure fitting and the other is for bolting on a bracket to hold the pipe in place.
The OB motor mount looks like a Prather. Man, I hated those things! A Du-Bro or Octura is much easier to use.
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RE: K&B 3.5 engine
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Ron,
Thanks for the reply, If you look closely you will see a brass nipple on the header (for tank pressure I assume) and if you look at the pic showing the motor mount that you hated so much (thanks, I will buy the du-bro!) above on the engine block there is an aluminum nipple like the brass ones.
Which one should I use and what do I do with the one I'm not going to use?
Thanks,
Pete
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RE: K&B 3.5 engine
if you use the fitting on the pipe just put a bolt in the one on the crankcase but make shure it isn t to long if you use the one one the case plug the one with a pice ot tubing with a bolt in it or put a screw inthe pipe
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RE: K&B 3.5 engine
As already stated, the nipple on the case is used for throttle exhaust. If going with a carb, use the pressure from the pipe. Looking at the pics again, the pressure nipple has to be on the pipe, not the header. Place the nipple near (just after it) the first weld on the flat portion. The other one, get some JB Weld and get that hole plugged.
If you want one of those mounts to replace the broken one, pm me your snail addy. Got plenty of those around that I'm no longer using. Might even have a Dubro mount system that won't be used either.
If you want one of those mounts to replace the broken one, pm me your snail addy. Got plenty of those around that I'm no longer using. Might even have a Dubro mount system that won't be used either.
#16
RE: K&B 3.5 engine
The pipe you have there is a Garcia Mini Marine 3.5 outboard pipe with the stinger broke off.
Lee Garcia made about a zillion different 3.5 outboard pipes but 95% of them ended up with about a .312" I.D. stinger internal diameter.
Lee used to make his stingers about 2-1/2" long and he inserted the stinger down inside the center of the pipe about an inch before welding.
The internal stinger inserted down inside the pipe effectively made the pipe a "quiet pipe" and it did not affect the performance of the pipe one little bit......
Mount the pipe pressure tap anywhere on the flat section of the pipe between the cones and take off or plug the pressure tap that is on the header.
If you don't have access to a TIG to weld up the hole just slip a piece of fuel tubing over the tap with a screw in the end of it to plug the hole.
Plug the pressure tap hole in the crankcase the same way......
You have to be an old guy like me to remember Garcia pipes.....Lee dissappeared off the boating scene about 15-20 years ago.Garcia pipes were made in SoCal....
Garcia pipes were good pipes.....you will be happy with the way it runs....Rod Geraghty
Lee Garcia made about a zillion different 3.5 outboard pipes but 95% of them ended up with about a .312" I.D. stinger internal diameter.
Lee used to make his stingers about 2-1/2" long and he inserted the stinger down inside the center of the pipe about an inch before welding.
The internal stinger inserted down inside the pipe effectively made the pipe a "quiet pipe" and it did not affect the performance of the pipe one little bit......
Mount the pipe pressure tap anywhere on the flat section of the pipe between the cones and take off or plug the pressure tap that is on the header.
If you don't have access to a TIG to weld up the hole just slip a piece of fuel tubing over the tap with a screw in the end of it to plug the hole.
Plug the pressure tap hole in the crankcase the same way......
You have to be an old guy like me to remember Garcia pipes.....Lee dissappeared off the boating scene about 15-20 years ago.Garcia pipes were made in SoCal....
Garcia pipes were good pipes.....you will be happy with the way it runs....Rod Geraghty