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Engines & Powertrain

Keeping your powerboat under power is a lot easier with good advice. Post your power systems questions here.
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  • 2 1/2" copper exhaust
    by Tightline5 » Sun Jul 31, 2011 9:17 pm
    32 Replies
    25050 Views
    Last post by J. Corbin
    Wed Aug 09, 2017 9:47 am
  • Suddenly poor running, KBL
    by kenkix » Sat Jul 02, 2022 2:15 pm
    1 Replies
    30 Views
    Last post by Captain Nemo
    Sat Jul 02, 2022 4:39 pm
  • No (low) power in cylinders 4,5, & 6
    by L76 » Thu Jun 30, 2022 9:29 pm
    1 Replies
    38 Views
    Last post by drrot
    Fri Jul 01, 2022 8:22 am
  • KFL won't start after it sits for 20 mins
    by L76 » Wed Jun 29, 2022 3:21 pm
    1 Replies
    42 Views
    Last post by L76
    Thu Jun 30, 2022 5:53 pm
  • Name Plate Restoration
    by Jessica » Wed Jun 22, 2022 12:57 pm
    2 Replies
    79 Views
    Last post by Bilge Rat
    Thu Jun 23, 2022 6:45 am
  • Frost/Freeze Plugs
    by kenkix » Thu Jun 16, 2022 1:11 pm
    4 Replies
    124 Views
    Last post by kenkix
    Mon Jun 20, 2022 12:30 pm
  • Oil Filter
    by gallagh59 » Tue Jun 07, 2022 6:25 pm
    2 Replies
    151 Views
    Last post by gallagh59
    Wed Jun 08, 2022 10:34 am
  • Water Pump Gasket
    by gallagh59 » Sat Nov 27, 2021 3:04 pm
    2 Replies
    1855 Views
    Last post by gallagh59
    Tue Jun 07, 2022 6:11 pm
  • Vapor Lock Issues
    by Nauti-Chris » Mon Jun 06, 2022 4:32 pm
    3 Replies
    152 Views
    Last post by Nauti-Chris
    Mon Jun 06, 2022 10:42 pm
  • Where to start?
    by Icanoedou » Fri May 13, 2022 3:07 pm
    6 Replies
    332 Views
    Last post by rgmxk22
    Fri May 27, 2022 6:48 pm
  • Swapping out 283 for 350 - issues / questions
    by birrellsa » Tue Apr 15, 2008 7:50 pm
    22 Replies
    12252 Views
    Last post by Jeff
    Mon May 09, 2022 8:40 pm
  • Paragon 1XE transmission repair
    by mark.pauster » Sun May 08, 2022 2:11 pm
    0 Replies
    117 Views
    Last post by mark.pauster
    Sun May 08, 2022 2:11 pm
  • KBL , at the end of its life?
    by Jarmo » Tue Feb 01, 2022 3:01 am
    11 Replies
    1362 Views
    Last post by Jarmo
    Fri Apr 08, 2022 5:15 am
  • K Engine Head Corner Stud Mod
    by les » Fri Mar 04, 2022 11:22 am
    1 Replies
    526 Views
    Last post by drrot
    Fri Mar 04, 2022 1:56 pm
  • Zenith carb question
    by trebot » Mon Feb 21, 2022 9:40 pm
    0 Replies
    506 Views
    Last post by trebot
    Mon Feb 21, 2022 9:40 pm
  • Changing to Heat Exchange System
    by Jeff » Wed Jun 23, 2021 8:08 pm
    1 Replies
    2106 Views
    Last post by [email protected]
    Mon Feb 14, 2022 3:38 pm
  • Drive shaft coupler
    by tedcartner » Sun Jan 23, 2022 7:43 pm
    0 Replies
    468 Views
    Last post by tedcartner
    Sun Jan 23, 2022 7:43 pm
  • Changes in Oil Pressure
    by Nauti-Chris » Fri Jan 21, 2022 3:10 pm
    2 Replies
    404 Views
    Last post by Bilge Rat
    Sat Jan 22, 2022 11:30 am
  • 6 or 12 volt battery
    by Woodfam10 » Sun Jan 16, 2022 11:25 am
    2 Replies
    592 Views
    Last post by Woodfam10
    Sun Jan 16, 2022 6:31 pm
  • Old original K motor start up
    by Woodfam10 » Sat Jan 01, 2022 8:39 pm
    6 Replies
    1242 Views
    Last post by Woodfam10
    Sat Jan 15, 2022 6:15 pm
  • Hot K exhaust elbow
    by Nauti-Chris » Fri Jan 14, 2022 3:58 pm
    2 Replies
    510 Views
    Last post by drrot
    Sat Jan 15, 2022 10:41 am
  • MBL with zenith carberator
    by [email protected] » Thu Jan 13, 2022 11:27 am
    1 Replies
    464 Views
    Last post by Bilge Rat
    Fri Jan 14, 2022 7:18 am
  • MCL 175 hp, for sale
    by joesoboti » Wed Dec 22, 2021 1:49 pm
    1 Replies
    670 Views
    Last post by JimF
    Wed Dec 29, 2021 10:08 am
  • Repowering 1956 MCL, best alternate?
    by joesoboti » Mon Sep 13, 2021 2:04 pm
    4 Replies
    1792 Views
    Last post by joesoboti
    Thu Dec 23, 2021 3:31 pm
  • Paragon 25 XE Transmission Question
    by CGSinkovitz » Tue Oct 05, 2021 1:15 pm
    2 Replies
    1853 Views
    Last post by CGSinkovitz
    Tue Oct 26, 2021 9:11 pm
  • Van Ness Engineering
    by tbcruiser » Wed Jun 30, 2021 8:19 pm
    1 Replies
    1651 Views
    Last post by mstjohn9
    Mon Sep 27, 2021 2:51 pm
  • 1956 Sportsman 17 K Engine Prop shaft length
    by [email protected] » Mon Sep 13, 2021 3:07 pm
    7 Replies
    2029 Views
    Last post by mbigpops
    Thu Sep 16, 2021 11:26 am
  • KL Carb Filter Cleaning
    by Tmalko » Tue Aug 31, 2021 9:26 am
    4 Replies
    1657 Views
    Last post by Tmalko
    Fri Sep 03, 2021 4:30 pm
  • Loud valves, adjustment needed?
    by joesoboti » Fri Jun 25, 2021 9:53 am
    6 Replies
    2039 Views
    Last post by trebot
    Fri Aug 27, 2021 8:23 pm
  • Can’t figure it out!
    by Carrpelll » Tue Jul 27, 2021 9:44 pm
    5 Replies
    1912 Views
    Last post by Carrpelll
    Wed Aug 18, 2021 8:08 pm
  • Hercules KFL engine noise, help appreciated
    by mark.pauster » Thu Sep 03, 2020 7:05 pm
    21 Replies
    5825 Views
    Last post by mark.pauster
    Wed Aug 18, 2021 3:51 pm
  • CC Prop #658 (12x13x1 RH)?
    by [email protected] » Thu Jul 29, 2021 9:19 am
    3 Replies
    1572 Views
    Last post by [email protected]
    Tue Aug 10, 2021 3:50 pm
  • Distributer Parts
    by CaptTPT » Wed Aug 04, 2021 11:03 pm
    6 Replies
    1882 Views
    Last post by CaptTPT
    Sun Aug 08, 2021 10:02 am
  • Slipping forward gear and not-engaging reverse gear
    by genovensis » Tue Jul 06, 2021 1:05 pm
    4 Replies
    2027 Views
    Last post by Captain Nemo
    Wed Jul 07, 2021 4:14 pm
  • Re-power 283/MRD "283" with Marine 350
    by Jeff » Wed Jun 23, 2021 7:52 pm
    1 Replies
    1395 Views
    Last post by Jeff
    Mon Jun 28, 2021 10:15 pm
  • Possible KBL Stuck Valve
    by dave tuttle » Mon May 31, 2021 9:26 pm
    3 Replies
    1738 Views
    Last post by dave tuttle
    Thu Jun 10, 2021 4:14 pm
  • Sherwood raw water pump
    by JesusVilla90 » Tue Jun 01, 2021 2:28 pm
    1 Replies
    1334 Views
    Last post by JesusVilla90
    Tue Jun 01, 2021 4:54 pm
  • Generator on Model K
    by dougz » Tue Jun 16, 2020 8:32 pm
    8 Replies
    3892 Views
    Last post by dougz
    Wed May 26, 2021 3:53 pm
  • camshaft replacement 283 flywheel forward
    by [email protected] » Sun May 23, 2021 8:43 pm
    2 Replies
    1631 Views
    Last post by [email protected]
    Mon May 24, 2021 3:06 pm
  • KL thermostat
    by trebot » Tue May 11, 2021 9:52 am
    1 Replies
    1608 Views
    Last post by mbigpops
    Wed May 12, 2021 6:37 pm
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