SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: Tikotiko on August 12, 2020, 07:06:25 AM

Title: Finally thank you guys
Post by: Tikotiko on August 12, 2020, 07:06:25 AM: Boat ran great. Has a slight hesitation around around 4600 4700 rpm. Im hoping its a rev limiter that im not aware of or the secondaries but i feel confident that it will perform well on the river. Im still going to get an MSD unit for piece of mind although i didn't notice anything with the Ebay HEI. Thank you to everyone thats given me advice. Definitely some fine tuning but it idled well and responded well so im happy. Clocked at 48 mph at 4700 rpm but i let off and cruised easily at 4500 rpm around 45mph.

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Title: Re: Finally thank you guys
Post by: angermgmt on August 12, 2020, 07:10:58 AM: Excellent! Great job and have fun.

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Title: Re: Finally thank you guys
Post by: 96Laveycraft21Xt on August 12, 2020, 04:45:06 PM: Awesome! keep at it, it will get sorted out. Be careful at Perris, the speed limit is 35mph on the lake, dont know how seriously they patrol it though
Title: Re: Finally thank you guys
Post by: FordLover on August 13, 2020, 06:33:37 AM: Awesome news! Enjoy!

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 13, 2020, 11:38:55 AM: Quote from: 96Laveycraft21Xt on August 12, 2020, 04:45:06 PM
Awesome! keep at it, it will get sorted out. Be careful at Perris, the speed limit is 35mph on the lake, dont know how seriously they patrol it though
I live about 10 minutes from the lake. Its been the only place ive taken the boat too since i bought it. But now.... we're river ready.

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 13, 2020, 11:39:14 AM: Quote from: FordLover on August 13, 2020, 06:33:37 AM
Awesome news! Enjoy!

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Thank you. Im very excited

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Title: Re: Finally thank you guys
Post by: FordLover on August 13, 2020, 05:47:37 PM: Quote from: Tikotiko on August 13, 2020, 11:39:14 AM
Thank you. Im very excited

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Hell ya brother. We all get that excitement. We are happy for you. Now go tear it up

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Title: Re: Finally thank you guys
Post by: 76Mantra455 on August 13, 2020, 07:09:26 PM: You going to the next event?

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 13, 2020, 07:30:13 PM: Quote from: 76Mantra455 on August 13, 2020, 07:09:26 PM
You going to the next event?

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Well let me see when and where it is. That would be awesome

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Title: Re: Finally thank you guys
Post by: midwestjet on August 14, 2020, 10:26:28 AM: Is the carburetor vacuum secondary or mechanical?

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 15, 2020, 10:24:58 AM: Quote from: midwestjet on August 14, 2020, 10:26:28 AM
Is the carburetor vacuum secondary or mechanical?

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Vacuum

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 15, 2020, 10:25:40 AM: Quote from: 76Mantra455 on August 13, 2020, 07:09:26 PM
You going to the next event?

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The one hot summer event is looking pretty damn possible. Working on something now

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Title: Re: Finally thank you guys
Post by: midwestjet on August 16, 2020, 01:14:34 PM: Quote from: Tikotiko on August 15, 2020, 10:24:58 AM
Vacuum

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Sounds like the hesitation is caused by the secondaries trying to open. I had a similar issue on my prop cruiser boat, it would stumble badly and not accelerate past a certain rpm if you were at full throttle. You could back off a little and it would eventually come up on plane. I added a little bit stiffer secondary spring so that they opened later and the problem went away completely.

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Title: Re: Finally thank you guys
Post by: Jered503 on August 16, 2020, 09:45:26 PM: Had a stumble on my old boat’s 750 holley vac. Adding a quick change kit for the spring and messing with the variety pack of springs (settled on the 2nd lightest one) along with upping the squirters 2 sizes pretty much cured my problem. Maybe that could help ur situation?

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Title: Finally thank you guys
Post by: Jered503 on August 16, 2020, 09:50:20 PM: I also messed around with the power valve. There are a few old posts with some good responses and suggestions for the vacuum Holley carbs on a jet boat. I was satisfied with the results I got from just a few changes after I rebuilt the carb.
Title: Re: Finally thank you guys
Post by: Tikotiko on August 17, 2020, 11:57:47 AM: Quote from: Jered503 on August 16, 2020, 09:50:20 PM
I also messed around with the power valve. There are a few old posts with some good responses and suggestions for the vacuum Holley carbs on a jet boat. I was satisfied with the results I got from just a few changes after I rebuilt the carb.
Great info thanks

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 18, 2020, 10:31:29 AM: Quote from: midwestjet on August 16, 2020, 01:14:34 PM
Sounds like the hesitation is caused by the secondaries trying to open. I had a similar issue on my prop cruiser boat, it would stumble badly and not accelerate past a certain rpm if you were at full throttle. You could back off a little and it would eventually come up on plane. I added a little bit stiffer secondary spring so that they opened later and the problem went away completely.

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Thanks for the tip. Thursday is spring testing day

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Title: Re: Finally thank you guys
Post by: Jered503 on August 25, 2020, 01:13:11 PM: How did it go?

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Title: Re: Finally thank you guys
Post by: Tikotiko on August 31, 2020, 07:42:06 AM: Quote from: Jered503 on August 25, 2020, 01:13:11 PM
How did it go?

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Time has not been on my side. I will be getting it out sometime this week after work now that i got all of these other things done. Lots of stuff going on but i killed most of it this weekend. Since i was welding I managed to make 2 pretty sweet removable flag poles. One for each corner of the rear. Unfortunately i didnt get to use them

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