Motor Dies when I Accelerate

[johnc62]

I have a 1995 Johnson 112 SPL. I was out on the lake the other day. Everything was normal and as I was leaving a fishing spot and getting up on plane my motor bogged down. I originally suspected that the problem was my that my gas gauge was a liar (1/4)showing or due to the choppy conditions the gas was sloshing around and was starving the engine. I was able to troll back to the ramp and occaisionally idle. Well low gas is not the problem. The engine idles normally or what I'm used to (I've always had a problem with the engine quiting after a few minutes of idling) and I can rev the engine out of gear w/o any problems. Again, when I accelerate and start to get on plane the engine bogs down. My fuel line and bulb are only a few months old. Could this be defective? Any suggestions on what the problem could be.<br /><br />Thanks,<br /><br />John C

 

[sloopy]

Re: Motor Dies when I Accelerate

Most likely it is the carb! Check the high and low speed jets and idle placement! Also it would not hurt to clean it out!

 

[grid]

Re: Motor Dies when I Accelerate

Sloopy's probability is good. To prove it, when you accelerate, push the ignition key in, activating the primer. If the engine picks up RPM, there's a blockage in one of the main jets. It'd be best to get that resolved before melting a piston.

 

[johnc62]

Re: Motor Dies when I Accelerate

Thanks for the replies. Is this something that I could do with a repair manual or should I let the PRO take care of it?<br /><br />John

 

[Bear]

Re: Motor Dies when I Accelerate

What if you (or the crew) pump the primer bulb? If it picks up, check your fuel pump. The diaphram might be shot. A little early on a 1995 model, but it can happen. Running out of fuel at wot...<br />Also check all fuel line connectors for an air leak.

 

[Parrot6909]

Re: Motor Dies when I Accelerate

Check for water in the gas line too. I had a similar problem with my old 90 Yamaha. It would run at lower speeds, but would bog down at Full Throttle.....all because of some pesky water.

 

[Brew]

Re: Motor Dies when I Accelerate

You can check and clean the carbs yourself without much difficulty. I'd get a manual first to ensure you put everything back as it should be. <br /><br />Took apart my carbs last spring for the first time without any problems.<br /><br />Good luck!

 

[Arnold96]

Re: Motor Dies when I Accelerate

Obviously it is not getting enough fuel. Likely one of three things is happening: 1 fuel pump is dying, 2 You still have a defective fuel line,(been there done that), 3 the needle valve in the bowl is not opening properly.

 

[Davidandkerrie69]

Re: Motor Dies when I Accelerate

Check and clean all the fuel filters. I had a similar problem (dying at speed, would idle and accelerate ok) with a 4X4. Turned out to be blocked sintered bronze fuel filter hidden in the carb.

 

[johnc62]

Re: Motor Dies when I Accelerate

Thanks for the replies. I pulled off the pump and opened it up. The orange rubber valves were deteriorated. I suspect some of this rubber is in my high speed jets. I spoke with a local tech and decided to have the carbs professionally rebuilt and the pump replaced. After looking at the carbs they looked simple enough for me to do, however, I didn't want to take any chances since I have a tournament coming up soon.<br /><br />Thanks,<br /><br />John