Remove propeller shaft seals if not removed with bearing in Step 9 and bearing carrier O-ring. A very easy simple download at a great price! The Yamaha outboard motor service manual downloads for the above listed models describes the service procedures for the complete engine. Replace water tube seal, if damaged. Product names, coloring and graphics may also differ. Lift impeller, drive key, and gasket from drive shaft. I assume one maybe for the remote power trim of the engine and the other maybe the trim position sender, right? If bearing surface is damaged, replace drive shaft and corresponding bearing.
Remove water pump base using flat screwdrivers to lightly pry up on base. Compression gauge Compression gauge hose Compression gauge hose attachment 5. Restart the engine and check the operation of the machine throughout its entire operating range. If reverse gear radial bearing is rusted or does not roll freely, replace bearing. Replace reverse gear if gear teeth or clutch teeth on reverse gear are rounded or chipped. Start and warm up the engine. Lift reverse gear, thrust bearing and thrust washer from bearing carrier.
Replace drive shaft if splines are worn or twisted. While cranking engine with starter motor, note maximum compression pressure reading on gauge for each cylinder. If wear sleeve is deeply grooved allowing water to enter gear case, remove and discard sleeve using Universal Puller Plate 91-37241 and mallet. If the performance is poor at low speeds, check for a white smoke in the crankcase breather tube. Check the idle speed, and check the operation of the controls and the engine stop switch.
After Payment you will be redirected to the download page. Install compression gauge hose attachment into plug hole, then connect compression gauge hose to gauge hose attachment and compression gauge. Start engine and allow to warm up, then shut engine off. This will prevent any residual fuel discharged from the cylinders being ignited by a spark discharge from the spark plug caps. Disconnect remote control throttle cable from throttle lever.
The main harness is no problem connecting it to the 4 stroke but I can't figure out where to plug the remote trim and the trim sender. The subsequent pages give detailed procedures. Replace forward gear if gear teeth or clutch teeth are chipped or worn. It compensates for the initial wear that occurs during the life of the outboard motor. Disconnect the safety lanyard from the emergency stop switch prior to cranking the engine. If reverse gear must be replaced, pinion gear and sliding clutch should be inspected or damage.
Direct inquiries concerning Yamaha outboards to your country's. The subsequent pages give detailed procedures. Apply constant pressure to cam follower in order to prevent it and internal components from ejecting out of the propeller shaft during removal of the cross pin from the clutch. Tags: 2-stroke outboard 250 hp yamaha repair manual, 4-stroke yamaha outboard 250h engine repair. The lineups of outboard models offered differ by country or area. Replace pinion bearing and race if either are rusted, pitted or damaged; or if bearing does not roll freely. Replace cam follower if worn or pitted.
Follow the Maintenance Schedule recommendations to ensure that the engine is in peak operating condition. Always read your owner's manual before using the outboard and be sure to use it properly. Guys, in a Yamy 250 4 stroke can anyone tell me what are the two square electrical plugs for? Then, restart the engine and check its operation within no more than 5 minutes after it is restarted. Replace cover if thickness of steel at the discharge slots is 0. Restart the machine and operate it for about 10 to 15 more minutes. I am helping my friend with the installation He repower from a old 1998 2 stroke and was told he could use the same ignition wiring harness. Use a punch and hammer to remove bearing.
Remove bearing and then sleeve using Puller Assembly 91-83165M with suitable jaws. Before starting the engine, fill the fuel tank with the fuel. The machine will now be ready to race. Disconnect safety lanyard switch plate from emergency stop switch. V6 3130cc 2-stroke 1994, 225 hp 90 deg. Replace forward gear bearing and race if either are rusted, pitted or damaged, or if bearing does not roll freely.
With propeller shaft horizontal, pull carrier using tool shown to break seal with gear housing. Prop shaft trueness should be measured with a dial indicator with prop shaft on V-blocks. Remove 4 screws 2 on each side of water pump housing , washers, and isolators. These can be diagnosed by a compression test, or by tracing top-end noise with a sounding rod or stethoscope. Replace thrust bearing and thrust washer if rusted or damaged.