SoCal Jet Boats
Discussion => The No Wake Zone => Topic started by: 92blownjet on October 23, 2011, 07:04:31 PM
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So yesterday I went out it lake Martinez in Yuma After some tuning and rejetting the carbs. I came out of the no wake zone and headed north towards the sand bar. I eased up on the throttle and it sounded pretty good with no problems. I got a little excited floored it and after about 2 seconds it's backfired real bad and killed the motor.. I quickly looked for a hole in the motor but everything looked normal.. I got towed to the nearest sand bar and started troubleshooting. I found there was back and forth play on the rotor. After pulling distributer I found 3 and a half teeth broke off the distributer gear. Today I pulled the timing cover to make sure there was no damage to the timing chain and that the bolts in the cam were still tight. I also checked the lash in a my rockers to make sure I didn't have a bent push rod or valve. I'm pretty sure it was run if way to lean and had too much timing. I jetted the carbs up 5 sizes to 73 on the primary and up 2 sizes to 78 on the secondaries. I had the timing locked at 32 degrees and backed it off to 28 degrees and still locked out. I took it back out today to make sure everything was ok.. I took it real easy for a while to make sure I don't Granade the motor. Then we made a couple WOT passes and monitored everything real close. The boat ran solid 80 mph with 2 people in the boat and 84 and some change with only myself in the boat.. Not bad for a small block in a 21 foot boat..
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Very cool :thumbup:
Post some pics when you get a chance.
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So yesterday I went out it lake Martinez in Yuma After some tuning and rejetting the carbs. I came out of the no wake zone and headed north towards the sand bar. I eased up on the throttle and it sounded pretty good with no problems. I got a little excited floored it and after about 2 seconds it's backfired real bad and killed the motor.. I quickly looked for a hole in the motor but everything looked normal.. I got towed to the nearest sand bar and started troubleshooting. I found there was back and forth play on the rotor. After pulling distributer I found 3 and a half teeth broke off the distributer gear. Today I pulled the timing cover to make sure there was no damage to the timing chain and that the bolts in the cam were still tight. I also checked the lash in a my rockers to make sure I didn't have a bent push rod or valve. I'm pretty sure it was run if way to lean and had too much timing. I jetted the carbs up 5 sizes to 73 on the primary and up 2 sizes to 78 on the secondaries. I had the timing locked at 32 degrees and backed it off to 28 degrees and still locked out. I took it back out today to make sure everything was ok.. I took it real easy for a while to make sure I don't Granade the motor. Then we made a couple WOT passes and monitored everything real close. The boat ran solid 80 mph with 2 people in the boat and 84 and some change with only myself in the boat.. Not bad for a small block in a 21 foot boat..
What brand gps is that....I need one. >:D
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Ummm.....did you find the distributor teeth??
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I found 2 of them.. They broke clean off so I figure if any damage was done then it happen when they broke.. I have a Windage tray and they are way too big to get sucked into the oil pump.. As far as the gps goes it matches up with my speedo on my truck and the speed warning signs on the side of the road..