Signs That a Johnson Outboard Engine's Fuel Mixture Needs to Be Adjusted. 4Turn the idle adjustment screw half a turn clockwise to tighten. Through these adjustments, you can set the valves at the right pace. On the other hand, a fuel mixture is considered "lean" if it contains a lower ratio of fuel to air. The prop is driven on by a. stainless steel shear pin 3/16"dia. In the finished part, the hole on the inside was also filled with JB Weld and the screw ends ground down to match the inner surface. Now, the ratio of fuel and air has to be perfect. To check this on this motor (when running), simply pull the rubber water tube off the Ell connection on the Port Side on the upper water jacket. Johnson outboard idle adjustment screw. All will fit and function, but usually the lesser diameter and pitched props used on the 8 hp.
Water intake screen tube which is situated in the lower unit directly. Water is forced into the. On most carbureted cars, the air cleaner housing is attached directly to the carburetor. Not too much of both is good for the engine. This is the primer function. Here are some common signs that indicate a Johnson Outboard engine's fuel mixture may need to be adjusted: - Decreased performance: If you notice a decrease in the engine's power or acceleration, it may be due to a lean fuel mixture, which can lead to a lack of fuel to the engine. This is for the longer hooked tail of the spring to go into. Before you even start working on the engine, you have to warm up the engine. When the engine is in idle mode, it uses a gentle stream of oil. Propeller Nut Cotter Pin: The stainless steel cotter pin holding the plastic cap on is 1/8" diameter X 1 5/8" overall length. I like to put the motor in neutral before I. pull the lower unit, and then if something gets moved, it is easier to remember. Johnson outboard rich lean adjustment unit. Step 2: Take the Engine Cowling Off. Threads) then hold onto the flywheel by wrapping your arm around it and lift up enough. I also purchased and installed a self contained hour meter that attaches to a spark plug wire, which was screwed to a thin aluminum plate that was bolted under the top thermostat bolt.
You need to keep the engine idle. "It's been a long time since I worked on my car. However my water pump housing was #0389577 which matched the #0389576 impeller. You may see different configurations of these plastic topped carburetors.
Or the aftermarket Michigan Wheel propeller, 1980 and newer Johnson 3 blade 8 1/2" X 9" 6 / 8hp #012032, at $81. Partially removed in order to access the Port side carb retainer nut. The plastic top or on the rear starboard side (depending on the year of. Johnson outboard rich lean adjustment guide. Have set the needles at 3/4 and 1 1/2 turns from seated. Timber fallers plastic wedges. There are a lot of parts, and each and every one of them plays a role.
Appreciate the help. These loose needle bearings are not interchangeable as the center main bearing is larger than the rod bearings. Some carburetors, such as the Quadrajet found in most GM vehicles, have a special screw and require a specific adjusting tool. While the larger less pitched used on the Sailmaster requiring more thrust for a heavier boat. I was not clear if mine had a replacement water pump OR if I got the wrong impeller. The reason in my mind for the difference is that the 8hp more than likely (if a long shaft) could be used on a sailboat. The intake of the fuel pump. It rotates instead of moving vertically as seen by the #10 & #78 bevel gears (located under the carburetor) shown in the midsection exploded views below. 35 hp Johnson carb tuning question. Add the alignment dowel pin and finish tightening these bolts. Plastic choke rod connects to the carburetor choke arm by a small headed pin.
There is no mechanical pump like what you would find in a four-stroke motor. For you owners of 1987. motors, you will have to look at your own individual fuel pump to decide which. Flushing This Motor: These motor's main water supply to the water pump comes from a screened tube right behind the prop in the exhaust outlet which utilizes the thrust from the prop to initially push water up to the water pump. This is designed so that since this is a 2 cycle and uses ports in the. There was one larger wear groove out farther and near the outer edge. Also, for the next step, you need all sorts of screwdrivers. QuestionHow do you tell if a carburetor is rich or lean? Johnson Outboard Rich Lean Adjustment - How is it Done. This one would be recommended of you are running a sonar/depthfinder or VHF radio. I try to always do this on the intake (spark plug) side. Any time you see rock dings, clean them up with a file, and try to keep all the blades as equal as possible. Engine misfire: The rich mixture can cause an engine misfire, leading to a loss of power and an uneven running engine. As on any motor rebuild, always mark the top of the piston with the number of the cylinder, l (like #1/#2 for Top/Bottom). Here the timing plate consists of the plate, pickup coil (white), and charge coil (black), with the wires leading out.
Exploded view of the 6 / 8 hp starter unit. After you finish with the adjustments, make sure to clean the carburetor. This muffler/outlet. This hole in the manifold is not cast but machined. But a bit of it "rains" out or splatters up against the inner crankcase and piston walls, then drains down settling at the lower main bearing. At the bottom connection is a small screened check valve. In this case, 100% of readers who voted found the article helpful, earning it our reader-approved status. Rich/lean screw adjustment on johnson. You will then need to remove the starter unit, carb, coils, powerpack, flywheel and timing plate assembly sooner or later, depending on your preferences, now or later, and whether you are. Doing more research, it proved that these where just the liners, (all that I really needed) at a price of $49. This surely was not normal and it looked kind of like someone had tried to weld it up at one time. Do make sure as was mentioned earlier that the transition point where the high speed jet joins the low speed jet output is set correctly (carb synchronization). For the early pumps, the cover and gasket have 4 scallops corresponding to. "Enhanced what I already knew.
The dowel at each gallon and use it as a measuring stick. You may encounter a carburetor that has no rear idle needle, and the adjustment needle is on the front of the plastic top, pretty much as seen in the photo above. Then, slowly bring them back to equal. After much usage the embossed Slow-Start-Fast speed indicators on the handle may get worn, however usually the start position is on top. Or the drive key could have fallen out upon the semi-final slide down assembly of the pump to the unit. There is a. prop shaft nose cap on the rear that is. But I'm not certain. But this exhaust tube is short enough that it does not connect to the lower unit, along with the tube itself is short enough (8") that it is probably 12" above the water level, again not creating a sealed area in the water pump cavity. I also repainted inside the lower pan, under the powerhead, easier now than later when everything is back together. You can see the screws turn when you press down on the accelerator. This lock needs to be in the lock position if you use the reverse gear on the motor so it won't kick up. These sell for only $30. Here you see the front & rear sections of the block||Here are the actual rods|.
Each screw is responsible for each valve. Now you have to locate the carburetor in the engine. In using these, you remove the flywheel nut first. Community AnswerThese screws usually are in the place where the fuel lines lead to the carburetor. 3) DO NOT oil the gear or spool, this will attract dirt, causing pinion to bind on spool.