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Sorry, you're over my head. How would I do that? Also, my son wonders if it might somehow be in limp mode. It accelerates fine up to 2300 RPM's. Always starts to studder beyond that point. If he gives it full throttle it will accelerate past that, but immediately stumbles and returns to 2300...

My son has a 2004 Yamaha 90 TLRB. Cranks and runs great until you try to get to WOT. Bogs down and falls on its face. Idles great. After doing a little checking we're finding no fire on cylinder #1. Swapped coils around and still just #1 not firing. It's getting gas to plugs, but no spark...

On the back of your ignition switch, I believe it's a blue wire. When the key is in the "ON" position this wire sends voltage to the ignition system. Since your lanyard switch only has 2 wires, once you determine that the blue wire on the ignition switch has 12V when the key is "ON", but no...

Do you have a plug in the bilge area to drain water from the front of the boat? Some boats have two plugs. One at the bottom of the transom to let water drain out and one pointing forward to let water out of the bow area of the boat.

Plugs are wet? Does it smell like gas? If not, you have water in your fuel. Take the breather box off and pump the primer bulb. Does gas come out of the carbs? If so, you have a float needle/seat problem. If your plugs are wet with gas, you don't have sufficient spark, or your flooding...

That's a standard Toyota 4Wheeler wheel. I've got them on my Chevy Colorado, but the hub hole is actually a bit to large for my truck, but it is a 4" hub hole. Go to a salvage yard and get as many as you want for about $10 each.

Wow, so the starting system is capable of spinning fast enough to start until you put a little back pressure from exhaust? That's pretty interesting!

Slow down! I'm going out with the wife tomorrow! High of mid 80's tomorrow here in sunny Savannah Georgia. I was telling my grown sons that in looking over years of boating pictures, the only months I've not been able to find any pictures of us all out in our boats were January and February...

I'd love to, but can't really find anything that matches what I have. The end of the shaft on the tiller has a wheel with slots for cables to fit in. Then there's nothing between that and the controls on the side of the motor where ther's another wheel for cables to hook up to. Also, I've...

I always look for at least 100 PSI. That's pretty low, but once worked on and running and warmed up a few times, it usually improves a little. Don't know if there's any specific about that particular motor though.

To claim it as a homemade trailer, you need to find and remove any serial plates that might be on the trailer. They're usually on the tongue.

Sounds like the motor is doing it's job, but the seals are leaking inside the cylinders. The pump basicaly pumps fluid from one end of the cylinder to the other end to make a piston go up and down. Watch a utube video on how to take the cylinders apard and replace the O-rings. There are lots...

Is the flywheel key in tact? Try putting some gas from the fuel tank in a spray bottle and spraying gas into the carb while cranking the motor. If that gets it to run, you have some clogged jets in the carb.

Not sure about other areas of the country, but here in southeast Georgia, every boat repair shop has dozens of boats that were dropped off for repairs and/or estimates and never picked up. So, they will occasionally turn some parts loose off of those boats. Look for those boat junkyards...

In the attached diagram of your carburetor, items 4, 5, 35 are all part of your idle circuit. The plugs need to be removed so you can thoroughly clean the passages beneath those plugs. In order to do this, you'll need to order a carb kit which will contain the replacement plugs. If you don't...

Nope. The end of the shaft on the tiller handle has slots for the cables to fit into. The cables go under the carb and connect to the shift and throttle linkages. Here they are...

Spark jumps 3/4" to 1" gap? Not sure that I've ever seen that before. How did you set the timing? Did you do a full link and sync? Spark is no good if at the correct time.

If it's always been hard to start and has always idled poorly, you have probably always run it lean at low speeds. The time to fix this probem was years ago.

What's the WOT RPM's and your top speed? What prop are you running?

Hey, it's a Yamaha! You just need gas and a good attitude! Spare fuse. Big screwdriver to manually release the motor if tilt/trim stops working (I didn't have one and took me 3 hours to return from a 30 minute outing because motor was tilted up to beach the boat and I was the last one to...