Tarleto1984
Recruit
- Joined
- May 28, 2018
- Messages
- 5
Hello everyone.
The past few weeks I have been working on my Mercruiser 470. Didn’t realize it was such a fun engine until I started to read up on it. I bought the boat less then year ago and have taken it out maybe 10 times. The last time about two weeks ago I ran into the voltage regulator deal. So after reading lots of advice on here I decided to do the alternator upgrade. Along with the upgrade I went ahead and replaces the points with the petronox ignition and flamethrower coil. The boat started up beautifully after. Sounded amazagin wile running. Idle was a little high though close to maybe 900RPM. So I checked the timing and guessed it to be close to maybe 20 BTDC After adjusting it back to 6 BTDC it sounded like it wanted to shut off so I adjusted the idle on the carb. So now all seemed fine and ready to go. I also replaced the Prop With the exact same prop just one that was not beat to hell.
So today I get the boat out on the water back from the dock give it gas and it dies at about 1500RPM. So I move the boat to a area with no one around, and start to check stuff. I check timing it was still good right at 6BTDC. So I started to mess with the carb and idle to see if that would have any affect. No luck I can coast anywhere maybe 5 to 8 MPH. As soon as I give it a little gas pushing it about 1500RPM the Carb backfires then dies. This only happens under load. When not in gear I can push the throttle with no problem.
Not sure when the last rebuild on the carb was. Like I said the boat amazing up to two weeks ago then it tried to catch fire on me. I have checked all the wiring to make sure everything was set right. Im sure it is. So what would cause the boat to only do this under load?
The past few weeks I have been working on my Mercruiser 470. Didn’t realize it was such a fun engine until I started to read up on it. I bought the boat less then year ago and have taken it out maybe 10 times. The last time about two weeks ago I ran into the voltage regulator deal. So after reading lots of advice on here I decided to do the alternator upgrade. Along with the upgrade I went ahead and replaces the points with the petronox ignition and flamethrower coil. The boat started up beautifully after. Sounded amazagin wile running. Idle was a little high though close to maybe 900RPM. So I checked the timing and guessed it to be close to maybe 20 BTDC After adjusting it back to 6 BTDC it sounded like it wanted to shut off so I adjusted the idle on the carb. So now all seemed fine and ready to go. I also replaced the Prop With the exact same prop just one that was not beat to hell.
So today I get the boat out on the water back from the dock give it gas and it dies at about 1500RPM. So I move the boat to a area with no one around, and start to check stuff. I check timing it was still good right at 6BTDC. So I started to mess with the carb and idle to see if that would have any affect. No luck I can coast anywhere maybe 5 to 8 MPH. As soon as I give it a little gas pushing it about 1500RPM the Carb backfires then dies. This only happens under load. When not in gear I can push the throttle with no problem.
Not sure when the last rebuild on the carb was. Like I said the boat amazing up to two weeks ago then it tried to catch fire on me. I have checked all the wiring to make sure everything was set right. Im sure it is. So what would cause the boat to only do this under load?
