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Hello all, I am fairly new to this site, but i am hoping to gain a little more knowledge about this goofy looking little boat. I have an overheating issue which seems to be pretty common with the 115 turbo jet mdls. At first i was not getting water to the heads. I found a leak in a home made sediment trap that the previous owner made. I figured it would be a pretty good idea to keep the same idea seeing as how he was trying to keep sand from entering the engine. after that i was able to get water to the heads and it runs fine on the hose but as soon as i start it in the water the buzzer starts sounding. It doesnt even got to really warm up. I know i need a slight tune up to include carb cleaning and plugs and i plan to do away with the oil injection system because i have never had good luck with them. My question is, does anyone know exactly how the cooling system works and flows in these crazy things? i know the jet picks the water up and sends it to the engine and i know that there are no rubber impellers to replace, but what path does it take? how does it end up in the exhaust, where are prominent areas of clogging concern, and whats the possibility of a bad temp sensor? as the buzzer is going off i can put my bare hand on the motor. its warm but wont burn your hand. same at the exhaust. Is it possible to install a temp gauge on the 115 bubbleback evinrude that it has? and does anyone have a service manual for this thing?
I also have a 115 HP 1995 Rage 15. Are you familiar with the turbojetmarineproducts company? (turbojetmarineproducts.com) You might want to check out some of the exploded parts diagrams on their website to get a better idea of the water flow questions you have.
Also, if you don't have one already you might want to purchase the TurboJet Service Manual for the TurboJet 90 and 115 engines -- I found one on line and it is very helpful.
Are you receiving a continuous warning signal -- or intermittent -- continuous is overheating warning, intermittent is low oil warning.
And if possible you might also want to have the TurboJet Operation & Maintenance Manual and the TurboJet Owner's Manual -- they both complement the Service Manual.
You definitely want to have a water strainer in the loop -- stock was to place it between the line coming in from the transom and the line going into the engine at the bottom of the block.
And if you, or anyone else, figures out how to install a temp gauge please post the steps -- I would like to install one in a heartbeat!
I was actually contacted my turbojet and they were a huge help with the cooling issue. The lady said that it sounds like my poppet valve in the jet cone was malfunctioning. I'm going to check into this afternoon.
As far as the temp gauge goes, I know on the same year evinrude 115 looper charged block and heads, the thermostat is located on the top of the head and there is a threaded blank in the same location. I am going to look for it today too. A temp gauge kit should have all the lines and sensors one would need.
And the alarm is constant. I'm going to do away with the oil injection and I will be putting a temp gauge on it so I will likely do away with the alarm. I'll keep you updated.
What's the top speed of your rage? For a 115, mine seems a little slow..
Here is what I had PM'd to mperryman -- sorry if this was inappropriate -- wasn't trying to avoid sharing
"Thought I would reach out to you directly regarding your Rage 15. Please let me know what you figure about the temp gauge idea — and if you figure out where to tap into the head, what gauge set up you are going to try.
Some history on our Rage — I am the original owner — bought it new in 1995 — ran if for about ten years and then pretty much dry-docked it until this past spring when I decided to get it back in the water. Even though I had “winterized” it when I dry-docked it, I had a bunch of corrosion to deal with. I ended up pulling the engine in order to clean out the thermostat housings and replace the thermostats — also cleaned up the muffler which had a bunch of crud built up in it. And I totally rebuilt the drive unit. Installed a new starter and plugs; and took the carbs apart for a thorough overhaul. The Turbojet Marine folks helped with many new replacement parts — and luckily my main components were OK and just needed lots of cleaning and repainting.
Since working on the engine and drive unit, I have had the boat in the water twice — first time ran OK but ended needing a short tow in due to fuel starvation issues. I had previously tried to clean the tank, but never-the-less still ended up with junk clogging the single fuel filter (and also the fuel hand pump mechanism between the tank and the filter).
Cleaned all that up, replaced the main fuel filter which is metal, and added a couple of clear filters upstream in the system. Tried a second run last week and still had fuel delivery problems (perhaps exacerbated by my tank being a bit low on fuel). Engine also seemed to be getting a bit warm to the touch.
Have once again run it on dry land with the hose set up — as you have noted with your engine, my engine on the hose also doesn’t seem to get too warm — using my cheap Harbor Freight laser temp gun the temp was around 110 degrees which seems pretty cool. Also discovered that my water strainer is leaking so have ordered a new one. I am hoping to take the boat out again this next week for another test run; and this time I am also taking along an extra gas tank to back up the main tank if it looks as if fuel is still problematic."
