Flexplate Replacement

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Brad @ SCJB

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« on: March 21, 2012, 07:22:49 AM »
I broke a high torque starter on my Southwind yesterday. I believe its because I am missing a few teeth in my flexplate. The starter was stuck on and spinning freely (the pinion wasnt even moving). I had to pull the battery to kill it. The Ignition key didnt turn it off.

So here lays the dumb question but figured it would make for good SCJB tech talk.....I'd like to replace the flexplate. Is it as simple as just buying one and replacing it? or do i have to rebalance everything? I figured I'd ask before I destroy another motor or starter for that matter.
  • Boat #1: 1978 Liberty
  • Boat #2: 1982 Eliminator Sprint


mobboss

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« Reply #1 on: March 21, 2012, 07:46:33 AM »
oh!!!! you know i think there are weights on a flex plate! good question????
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SoCalPSD

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« Reply #2 on: March 21, 2012, 07:58:43 AM »
I would think as long as you buy the same style flex plate you should be good. Some engines are internally balanced and some externally.

Fat fingered from the phone-  Corey

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mash on it

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« Reply #3 on: March 21, 2012, 08:06:26 AM »
What motor? I always run a ford type solenoid with a gm type starter for exactly that reason. I had the gm starter stay on (454) and engaged till I unhooked the battery, at the lake. that hasn't happend since. A 460 ford that has the solenoid on the starter has another solenoid inline from the factory (Hardin marine). As far as the flexplate, Ive had good luck swapping them out with no problems, but the motors were mostly stock.
CJ/RR 212...under construction  "Pistol Annie"

Brad @ SCJB

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« Reply #4 on: March 21, 2012, 08:21:16 AM »
Its a chevy.

The funny thing is I got this high torque starter new in a lot of parts when i picked up that tahiti awhile back from hava-al. It was new, maybe got used 10 trips max. now its busted.

The starter I put back in the boat is the ORIGINAL starter that came on the boat when purchased in 1978. It might weigh 50lbs, but it still works.
  • Boat #1: 1978 Liberty
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Marcsrollin

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« Reply #5 on: March 21, 2012, 08:44:05 AM »
Is your motor internally balanced? If it is you have to buy a neutral balance flexplate.
  • Boat #1: 1978 TX-19 Youngblood
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Taco'd "a person or people that show up with one lake lice and a family of 50 and cram 3 people at a time on it with no disregard to boating rules or ethics. Usualy crap in toilets and throw shit paper in trash cans. Hang out at the boat ramp like its a swimming hole. Have zero insurance on anything they own and dont give two shits less about your property."

Brad @ SCJB

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« Reply #6 on: March 21, 2012, 08:45:45 AM »
Is your motor internally balanced? If it is you have to buy a neutral balance flexplate.

ok, so how can you tell if its externally or internally balanced on a chevy?
  • Boat #1: 1978 Liberty
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mash on it

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« Reply #7 on: March 21, 2012, 10:11:08 AM »
396 & 427 = internal
454 external (all Mk IV) '72? to '90
Gen V internal, I think '91 up
I've got both if needed
$31 from checkerzone
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Brad @ SCJB

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« Reply #8 on: March 21, 2012, 10:23:18 AM »
so something like this will work? no problems? bolt on and go?

http://www.summitracing.com/parts/SUM-G102SFI/
  • Boat #1: 1978 Liberty
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mash on it

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« Reply #9 on: March 21, 2012, 10:33:45 AM »
CJ/RR 212...under construction  "Pistol Annie"

ka0tyk

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« Reply #10 on: March 21, 2012, 10:34:55 AM »

Brad @ SCJB

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« Reply #11 on: March 21, 2012, 10:37:42 AM »
yyyup.

what are you getting at? your tahiti is busted?  ;)   jk

i dont need it before parker. it still works for now. just wanna get it fixed before i put her up on the auction block.
  • Boat #1: 1978 Liberty
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mash on it

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« Reply #12 on: March 21, 2012, 10:39:40 AM »
30 mins pull the motor, 15 mins swap out the flexplate, 30 mins to install the motor
Done before dark.

Daniel
Mash on it
CJ/RR 212...under construction  "Pistol Annie"

Brad @ SCJB

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« Reply #13 on: March 21, 2012, 10:41:42 AM »
times are tough buddy! thats $30 out of my beer drinking funds! plus, if it breaks this weekend, i always have 19dana to tote me around  O0
  • Boat #1: 1978 Liberty
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mash on it

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« Reply #14 on: March 21, 2012, 11:08:41 AM »
counted no less than 4 flexplates in the shop, but the fuel from BHC 2 LV is scheduled for parker ($130)  :thumbup:

$30 bar tab? thats about an hour... :beer: :beer:

Daniel
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