Anyone else use exhaust wrap?

JWBris

JWBris

New member
I just wrapped the exhaust on 28hp EFI Subaru engine as I was getting vapor lock in very hot weather.
It seems to have stopped the radiant heat instantly, so I can't wait to test it out next week.
It also seems a bit quieter as well, which is a bonus!
I also wrapped the fuel line in the wrap as well to try and keep the fuel cool.
Anyone else done this.......and were the results good or bad?
Pic of me burning the wrap in so I don't turn up to a clients and smoke starts pouring out!
Wrap2.jpg
 
JWBris said:
I just wrapped the exhaust on 28hp EFI Subaru engine as I was getting vapor lock in very hot weather.
It seems to have stopped the radiant heat instantly, so I can't wait to test it out next week.
It also seems a bit quieter as well, which is a bonus!
I also wrapped the fuel line in the wrap as well to try and keep the fuel cool.
Anyone else done this.......and were the results good or bad?
Pic of me burning the wrap in so I don't turn up to a clients and smoke starts pouring out!
View attachment 30165
Click to expand...
my 28 hp subaru shut down every time it got to 90 degrees. The fuel pump over heated and the diaphragm inside stopped pumping. I tried everything, even a booster pump. Didn't work. Subaru is aware of this problem by the way. I called them several times and the vendor I got the engine from did too. The final explaination is that the pumps are faulty. Unfortunately they are wired as such, you can't just put a replacement pump on there because the onboard computer won't recognize it, and turn it on and off.
 
I use exhaust wrap on my muffler but not for performance reasons just to prevent from burning myself.One large vendor sold them for a while and now they dont this may be the reason.
 
Ralph Q said:
my 28 hp subaru shut down every time it got to 90 degrees. The fuel pump over heated and the diaphragm inside stopped pumping. I tried everything, even a booster pump. Didn't work. Subaru is aware of this problem by the way. I called them several times and the vendor I got the engine from did too. The final explaination is that the pumps are faulty. Unfortunately they are wired as such, you can't just put a replacement pump on there because the onboard computer won't recognize it, and turn it on and off.
Click to expand...
That's a bugger!
I have now wrapped my entire fuel line in exhaust wrap and or covered with a larger diameter rubber hose over the existing fuel line. I also wrapped around the fuel pump and ran it with that on for 8 hours straight on Friday in 33 degree or 92 in US language, with no problems. So I'm hoping Ive eliminated the problem with that and now with the extra heat reduction by wrapping the exhaust, hopefully it will be a thing of the past and never occur again. If you say Subaru acknowledge that they stop working when they get hot, then by insulating the pump, it should fix it by keeping the radiate heat from getting to it.....one could hope!
Maybe try wrapping your fuel line and pump if your still having problems with yours. When I used to race cars......many years ago now, it was all about keeping the fuel as cool as possible for maximum performance.
 
Kiloman said:
I use exhaust wrap on my muffler but not for performance reasons just to prevent from burning myself.One large vendor sold them for a while and now they dont this may be the reason.
Click to expand...
Did you find it kept the temps around the engine down by eliminating all that radiant heat so close to the engine?
 
I ran into issues with my 35hp briggs, used a 9 psi lift pump 6 inches from the fuel pump solved my problem. I know that didn't work for you, I just kept all the fuel lines low and actually zip tied the line to the cold water line to the pump. for the last 4 feet before going to the lift pump and up to the pump on the engine. I had a box truck in which exhaust went out one side, and had the intake air hosed in from the other side.
 
Do you realize you now have about 27,000 yanks Googling Bugger? Wait til you tell 'em its cactus. Hahahahahahaha
 
JWBris said:
That's a bugger!
I have now wrapped my entire fuel line in exhaust wrap and or covered with a larger diameter rubber hose over the existing fuel line. I also wrapped around the fuel pump and ran it with that on for 8 hours straight on Friday in 33 degree or 92 in US language, with no problems. So I'm hoping Ive eliminated the problem with that and now with the extra heat reduction by wrapping the exhaust, hopefully it will be a thing of the past and never occur again. If you say Subaru acknowledge that they stop working when they get hot, then by insulating the pump, it should fix it by keeping the radiate heat from getting to it.....one could hope!
Maybe try wrapping your fuel line and pump if your still having problems with yours. When I used to race cars......many years ago now, it was all about keeping the fuel as cool as possible for maximum performance.
Click to expand...

I was working in a backyard of a customer, and somehow a little grocery bag from the neighbors trash got sucked onto the intake to cool the engine. Engine overheated and burned up wires and everything. Couldn't get it started. It is a giant $1800 paper weight now. And I am not sorry to see it go. Oh by the way, the engine is supposed to have a temp sensor that shuts down the engine when it gets too hot. Didn't happen. It only shuts off when I didn't want it to. Not when it was supposed to.
 
Ralph Q said:
I was working in a backyard of a customer, and somehow a little grocery bag from the neighbors trash got sucked onto the intake to cool the engine. Engine overheated and burned up wires and everything. Couldn't get it started. It is a giant $1800 paper weight now. And I am not sorry to see it go. Oh by the way, the engine is supposed to have a temp sensor that shuts down the engine when it gets too hot. Didn't happen. It only shuts off when I didn't want it to. Not when it was supposed to.
Click to expand...
So what engine did you replace it with and have you been happy with the new engine Ralph?
 
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