www.marineengine.com/newparts/part_details.php?pnum=OMC0300611 This should be the part you’re looking for. If you need it in a hurry, I would take this part number to any local boat shop and see if they have one in stock.

Was the old rubber impeller in one piece still when you took it out? If not, some of the rubber chunks might be blocking the waterways throughout the engine. It’s also possible you picked up some sand or something of that nature that’s blocking the waterways. I’ve also seen the water waves around the head accumulate hard water deposits enough to start washing stuff, which could be a problem. It might be worth it to take your thermostat out and verify it that it’s working properly also. I would start by taking the lower unit off again, and putting some compressed air through the pick up tube and see if it comes out anywhere. I wouldn’t use high-pressure, about 20ish psi is all. Verify that the the key for the impeller didn’t fall out at some point during reassembly.

If it’s been sitting with ethanol blended gas it it’s not a bad idea to do the welch plugs also. Usually blasting all of the ports with carb cleaner is enough to clean up the cavities behind the welch plugs. I thought about adding it to the video, but it’s tough to show how much pressure to put on a welsh plug in a video, and I didn’t want people to damage the carburetors dealing with the plugs. But if people feel comfortable swapping the plugs out, they probably already know how to do It, was my thought process. I might dedicate a video for swapping the plugs out at some point. Thanks for mentioning it!

Two strokes have a tendency of loading up if you’re idling around really slow for long periods of time. That might be the bogging sensation you’re getting on takeoff. If it smokes pretty bad and comes out of the bogging issue after you takeoff it’s probably just load up. Keep in mind the fuel and the oil both go through the crank case before they go into the combustion chamber and that’s where the load up usually happens. If you think it’s more than that, I would try replacing your spark plugs and verify the correct gap on the spark plugs. It’s not a bad idea to have a couple of spare spark plugs with you anyway especially if you’re trolling a lot with a two-stroke. The load up can eventually foul them.

@@wetshoesmechanic Thank you for your reply. I did put in new plugs. Yeah it will come out of it after 15-30 seconds. Maybe I just need to run it open more often when trolling. Thanks again for your help and your great videos.

Happy the video could help!

A little bit of grease on the splines on the part of the shaft that connects to the motor isn’t a bad idea. It helps displace water to keep it rust free.

Thanks!

I’m glad this could help!

Yeah

Thanks for the comment, and thanks for watching!

Thanks for watching, and good job on getting that running!

I would start with the carburetor. Rotate your slow speed needle valve clockwise until it seats. Do not force it. Once it seats rotate it counterclockwise 1.5 turns and try that. You may have to fine-tune it after that, but that should allow it to run at least. Make sure the idle adjustment screw on the side of the motor is turned up high enough to allow it to idle at a reasonable RPM. If after all of that, you suspect fuel delivery problem, I would verify that your fuel line is in good shape and flowing fuel freely to the fuel pump. Also, make sure that the vent in your fuel tank is working properly. If needed, after all of that, I would throw in a carb rebuild kit, and plan on doing your fuel pump also. Keep in mind there are other considerations that could be a problem. These are the simplest things to fix, but there is also throttle linkage timing, reed valves, cylinder compression, and making sure the gearbox is free to move to consider also.

Thanks!

The impeller is pretty cheap, and just to be on the safe side. I would change it out at least every couple years. Even if it’s not weather checked, or falling apart, the fins lose their elasticity over the years and you will lose water pressure over time. If you wait too long, the impeller blades can start deteriorating and falling apart and once that happens, they get into the waterways inside the block, and they become problematic to get out later.

If you’re having trouble with air getting into your fuel line, I would check your connection points at the fuel tank, and at the engine, mainly the O-ring in the fitting. If your fuel lines, or bulb are old and weathered, I would replace them. Even a small compromise in your fuel line could introduce air into the system. Question though, how do you know you have air bubbles in your fuel line? What are the symptoms?

I use marineengine.com a lot. If you put in your model number, it will bring you to the correct page and give you a nice diagram to find all the parts you need.

It’s possible the pinion gear shifted inside the gearbox just enough to make the shaft Alignment tough. With a flashlight try to look down the hole and with a pick, or even a stiff metal rod you can try to realign it enough for the shaft to fall into the gear. I’ve never had trouble with the 15 hp, but I have struggled with a 2 hp that has this problem. Worst case scenario you might have to pull the gearbox end off to get in there to realign the gear. It’s not too bad if you have to get into that.

@@wetshoesmechanic Thank you for the reply. I had tried to put the shaft back in, and it would shift into reverse but not forward. On the advice of another friend, I turned the shaft slowly while trying to shift it into forward, and it eventually went. I put it back together and it seems to be working fine now. The manual I bought is horrible; tries to cover decades worth of motors and jumps around a lot. I would have been better off going straight to KZbin. It's an old motor that used to belong to my dad... After he passed over 20 years ago, I had the local outboard shop winterize it, then I packed it in a crate. I hadn't planned on leaving it there quite this long, but with new plugs, new water pump, and fresh gear lube it appears to be good to go again.