It was still possible to get it into the proper alignment, but only at the very end of the adjustment range. Careful break-in or a properly overhauled motor will ensure many years of service for the trusty powerhead. On all motors except the 2. What you are doing is holding the throttle cam still, in the idle position, and using the thumbwheel to move the timer base until you get the correct idle speed. This is a very strong running Evinrude 88 hp outboard boat motor. With the help of people on this messaage board I can do it better myself. A needle, that is stuck closed, will prevent fuel from entering carburetor.
This, in addition to extensive research, is how Clymer repair manuals achieve an unmatched level of detail. Similarly, proper tune-ups that help maintain proper airlfuel mixture ratios and prevent pinging, knocking or other potentially damaging operating conditions are the next best way to preserve your motor. The shop manual will guide mechanics and owners through each service, troubleshooting and repair procedure possible. A machinist is naturally going to be more experienced with the procedures. Note: 88 runs the Nauset mighty fast and smooth except at idle.
This model has a electric starter and power steering. The pistons have a 99. Anti-Siphon valve restricting fuel flow. Cleaning the gearcase will also help you spot potential Fig. Part of the difficulty was due to somewhat worn throttle cam and spark advance cam rollers. I have bookmarked this thread for light reading come spring. Keep in mind that anytime pistons, rings and bearings have been replaced, the powerhead must be broken-in again, as if it were a brand-new motor.
Eventually, all powerheads will require some repair. We have completely gone through and tested this outboard out and it checks out excellent. . Air leakage into fuel system. Unfortunately, by moving the spark advance lever we displace the previously, carefully aligned cam and follower. Outboard quits and cannot be restarted 8.
This motion also forces out on the fuel pump diaphragm, which, in turn, closes the inlet check valve to keep fuel from returning to fuel tank and opens the outlet check valve, thus forcing fuel to the carburetors. There's no need to actually check the timing itself. This can be especially helpful if the overhaul or rebuild is going to take place over an extended amount of time. Then, if necessary, readjusted alignment of the cam roller to the mark on the cam. Our low price match guarantee and fast direct shipping will get you on your way. Most all Workshop manual chapters start with an assembly or system illustration, diagrams, exploded parts view, pictures, service information and troubleshooting for the section. Idle mixture set too lean.
An inlet needle in carburetor that is either stuck open or closed. This should produce the specified engine speed. Again, these are generalizations and, working carefully, a skilled do-ityourself boater can disassemble and repair a as a seasoned professional. Improper main jet or restricted jet. Main nozzle or idle nozzle air bleed holes plugged.
But, even given the best of conditions, components in a motor begin wearing the first time the motor is started and will continue to do so over the life of the powerhead. The other adjusts the position of the throttle cam relative to the carburetor and doesn't affect timing. Some symptoms of restricted lean fuel flow, are: 1. My problem has been too much spark advance at the low speeds. Evinrude Johnson Outboard Service and Repair Manual This Clymer outboard shop manual covers Evinrude Johnson 2-300 horsepower engines for the years 1991-1994. Even if this information is the same as the original factory specs, boats are sometimes modified. Taking Care not to damage the driveshaft and the water tube, separate the lower unit from the exhaust housing by pulling straight downward.
Not onlv is it im~ortantto make sire the oil is at t k proper level not above or below , but it is important to check the oil for signs of contamination from moisture. In general, the goal of most two-cycle engine idle speed adjustments is to set the ignition timing to a particular point, set the throttle plate to closed, and align this with minimum throttle lever position or idle speed. Replace both if you have any doubts as they affect the linkage geometry and proper timing. Note that the correct idle speed is supposed to be set only in the water, with the right prop, while moving. This is not because they are not capable of the task, but because that's what a machinist does day in and day out. A crack in the fuel outlet tube located in fuel tank.
This is the classic cross-flow v4 block that has been a proven design for a very long time. Copyright 2019 Marine Service Manuals. As the throttle level is moved forward, typically the ignition timing is advanced while the throttle plate stays closed. If necessary for service or access, remove the propeller, for details refer to the procedure in the Maintenance and Tune-Up section. So, when it comes time to take care of your Evinrude 88 Special, let us help you out.