Search found 13 matches

by HuntOnTheWater
Fri May 31, 2019 8:24 am
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

Re: PROP or ENGINE SHAKE???? above 4,000rpm

Update: Rebuilt the carb and changed spark plugs. Went an ran the boat and it got rid of the shake I was having at high rpms, but engine still creeps up in temp. So I did a compression test yesterday and have 180 to 200 psi on all cylinders except number 5 cylinder there is about none. Took valve co...
by HuntOnTheWater
Wed May 29, 2019 5:37 pm
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

Re: PROP or ENGINE SHAKE???? above 4,000rpm

Deano, I was the same about the fuel pressure gauge, set it and forget about it. But having it on the motor is being able to better determine the problem on the water before you screw something up. Just like I run an extra manual oil pressure gauge screwed directly into the block, no manual oil lin...
by HuntOnTheWater
Tue May 28, 2019 12:55 pm
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

Re: PROP or ENGINE SHAKE???? above 4,000rpm

Are the secondary's working properly or fuel pump issue, could be going lean at higher rpm, would get hot as well. Do you run a fuel pressure gauge? Just a thought I do not have a gauge to see pressure. I was going to look at that this afternoon and t into the line with a gauge from the pump to the...
by HuntOnTheWater
Mon May 27, 2019 1:43 pm
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

Re: PROP or ENGINE SHAKE???? above 4,000rpm

Is this symptom something that’s been happening or just started out of the blue? It has been going on for quite some time and I figured it was part of my cracked flex plate issue. I replaced the flexplate which was bad and also the intake gasket I was told it could be something with my ignition sys...
by HuntOnTheWater
Mon May 27, 2019 1:27 pm
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

Re: PROP or ENGINE SHAKE???? above 4,000rpm

I had an issue where at times I also thought it was a wobble or something to do with the prop. Turns out, coolant was getting past my head gasket on one side. Replaced both head gaskets high performance ones and no issues. Might be worth checking the spark plugs after the symptoms appear to see if ...
by HuntOnTheWater
Fri May 24, 2019 3:40 pm
Forum: Airboat Tech
Topic: PROP or ENGINE SHAKE???? above 4,000rpm
Replies: 15
Views: 2019

PROP or ENGINE SHAKE???? above 4,000rpm

I have a 15x8 diamondback with a 2:1 belt reduction, 383 stroker, and a 78” prop. Boat cruises great at 3600 to 3800 rpm. When I get into it above 4,000 it feels like the prop starts or engine start to shake and wobble. Thought it could be a valve sticking as well. Was curious if anyone had any inpu...
by HuntOnTheWater
Sat Apr 06, 2019 9:37 am
Forum: Airboat Tech
Topic: Mounting Flexplate to Drive Plate ???
Replies: 2
Views: 1152

Mounting Flexplate to Drive Plate ???

I recently just replaced my flexplate I am running a 383 stroker with a ch3 2:1 reduction. When I attached the flexplate to the drive plate with the 6 bolts and spacers I torqued the flexplate bolts down to 35 lbs and I am still able to spin the bolt in the hole by just turning on the head of the bo...
by HuntOnTheWater
Thu Apr 04, 2019 1:51 pm
Forum: Airboat Tech
Topic: HELP! Belt Drive Knocking Noise
Replies: 10
Views: 1702

Re: HELP! Belt Drive Knocking Noise

I got a new flywheel put on and have put 15 hours on everything and havent taken the boat over 3600 rpm until yesterday. It had some good wobble shaking going on somewhere around 4400 rpm. Any ideas what this may be?
by HuntOnTheWater
Wed Mar 27, 2019 9:19 am
Forum: Airboat Talk
Topic: 3D gold airboat pendent
Replies: 21
Views: 1620

Re: 3D gold airboat pendent

Type in gold airboat charm in ebay. Quite a few options.
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by HuntOnTheWater
Mon Mar 25, 2019 11:04 pm
Forum: Airboat Tech
Topic: HELP! Belt Drive Knocking Noise
Replies: 10
Views: 1702

Re: HELP! Belt Drive Knocking Noise

Going to replace lower bearing as well it looks to have seen its better days.
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by HuntOnTheWater
Mon Mar 25, 2019 11:02 pm
Forum: Airboat Tech
Topic: HELP! Belt Drive Knocking Noise
Replies: 10
Views: 1702

Re: HELP! Belt Drive Knocking Noise

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by HuntOnTheWater
Mon Mar 25, 2019 11:01 pm
Forum: Airboat Tech
Topic: HELP! Belt Drive Knocking Noise
Replies: 10
Views: 1702

Re: HELP! Belt Drive Knocking Noise

I ended up tearing it down just now and it was the flywheel flexplate looks good. I appreciate the input fellas
by HuntOnTheWater
Mon Mar 25, 2019 6:51 pm
Forum: Airboat Tech
Topic: HELP! Belt Drive Knocking Noise
Replies: 10
Views: 1702

HELP! Belt Drive Knocking Noise

Any help would be appreciated. I have this new knock coming from somewhere behind the engine I believe. I have a 383 attached to a ch3 2:1 reduction and a 3 blade 78” 3 blade. The knock comes and goes and will be loud at times at idle and you can hear it louder and louder as you give it throttle. En...

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