I have an old outboard boat motor there are not any markings except a number stamped on the base how do I find out what it is

SOURCE: I have a 90 Horse power Mercury outboard Boat

Sounds like the starter. Check if you have power at the solenoid from the battery with just the power on (key turned on, power switch on.) thats good-- you have power-- if not you have a wiring problem from your battery or main switch.

Otherwise you have a starter problem probably.

SOURCE: outboard motor charging systems

Look at your ID plate and get the model number of your motor. Then contact the Johnson dealer and see if your model comes with a charger, be it alternator or magneto. Many use systems similar to riding lawnmowers and they do not need charging.

SOURCE: my yamaha outboard will not shut off?

Check that the ignition swith is grounded.

SOURCE: Yamaha 115hp 2 stroke Outboard Boat Motor. Went

is it carbureted or fuel injected? are your warning horns working? if it iscarbureted then a few easy test can be done to find out. if its fuel injected then its a little harder but not impossible.(1) check compression. without the year model I'm giving you a average numbers. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark fuel is the problem nine times out of ten. clean fuel lines replace primer bulb and replace all fuel filters. Yamaha has a gravity filter under the engine coul. take it to the lake if no improvement. clean carbs. same test to be and fuel system service used of fuel injected engines. if no improvement in engine preformance then you will have to take it to a dealer to test with computer.

SOURCE: want to replace the trim/tilt motors on my 1995

no. a unmodified transom bracket may need to be moved not removed. Since the tilt motor is out you will need to manually lift the engine. you can see the picture diagram at www.yamaha-motor.com. click on outboard motors,parts and service, view parts catalog. find your year make and model by following steps listed at top. select power trim and tilt assembly. in the picture you will see the location of the Manuel release valve on the starboard side. turn the Manuel release valve then lift the engine. tie it up or use a stand to keep it up,do not use the tilt lock. with the engine in full tilt position, you can see the motor. some brackets are modified were you can remove the motor without moving the transom bracket. If unmodified you'll need to follow these steps. (1) lower the engine back down.the steering arm needs to be removed from the steering cable and swung forward. do not remove steering arm from engine. on the starboard side of the engine you will see the steering cable going into the steering cable tube. (2)a 1 1/6 nut secures the cable to that tube remove it and slide cable out do not remove it.(3) lift engine again and secure it. your about to remove the motor mount bolt so make sure you secure the motor completely (4)remove upper and lower transom to bracket bolts remove bolts on the port side only.(5) you will see three bolt that go through the transom bracket to the trim and tilt assembly. remove them.(6) if all bolts are removed you will be able to slide the port transom bracket to the left out of the way(7) remove tilt/trim motor.