View Full Version : General Q & A




  1. MG502 Difference
  2. 502 MPI - valve cover vent tube size.
  3. 525 efi water temp sender
  4. Down turn / Underwater Exhaust?
  5. Interresting teardown
  6. Engine power question N/A motor
  7. Coolant hose question
  8. best oil for 500efi
  9. PPI before purchasing engines?
  10. Question on 380 K planes
  11. Running Hard: RPM + Distance
  12. Can someone lookup serial number 0C352476?
  13. Dual Dominator Blower carb Accellerator pump tuning/linkage adjustment
  14. Storing/Working on boat of trailer
  15. Looking for a new Lovett 900 bildge pump
  16. Valvetrain vids
  17. Can we make a Sticky for how boats are constructed? Useful when buying used boats....
  18. Aluminum hub coupler or Steel?
  19. TB IV timing different from G5 454 to G6 502?
  20. 454 Magnum EFI experts, I have some questions regarding a pending boat purchase
  21. Mercruiser power steering pump vs. Automotive pump
  22. Shipping a BBC
  23. Need Trim pump ID from KAAMA boats PIcs inside
  24. Mechanical fuel pump
  25. flushing without Drives?
  26. Good oil thermostats??
  27. Fuel issue
  28. What size carbs for B&M 250 blowers
  29. Saltwater used engine
  30. Ditch MerCathode for Anode Protection?
  31. Carpet Backing
  32. Mercury Verado 300's
  33. The rookie
  34. Best way to mount stand up bolster seats
  35. Header feedback
  36. 525 EFI question....
  37. Looking for cam ideas 5.7 Vortec Carb
  38. K/E Spring Oilers
  39. low compression 548 dyno testing has begun!!
  40. new standard lower
  41. Big cube 454 for fun
  42. 500efi hp gains
  43. WTB Air Dock Lift
  44. Rochester Quadrajet
  45. HP500efi Cylinder Heads
  46. Rigging/plumbing things
  47. Supercharged 502 versus HP500's
  48. Edelbrock EFI fuel pumps
  49. Where to buy windshield grommets for windshields?
  50. Will the Canton 90 Degree oil filter block adapter support both filter & cooler?
  51. Timing set for gen v block with step nose cam
  52. What happened to black baja
  53. BBC blower pistons.
  54. HP 500 Rebuild expertise
  55. Where to buy "Stainless marine" exhaust gaskets, disk gasket between the manf. &pipe
  56. Which Gimbal Anode? Two Part #'s Showing.
  57. Oil pans BBC
  58. Would you be afraid of buying a boat with these motors?
  59. Oil filter head.
  60. Need slightly taller 502 valve covers...
  61. Innotech dash panels??? Still in biz???
  62. Who's got a desk top dyno?
  63. 1985 454 best heads to use?
  64. Valve Cover Options , Opinions Needed
  65. Found something inside a coolant hose
  66. Tail pipe builder Grand Rapids MI area
  67. Bbc SC deck height
  68. Dump the Carb, intake, or both?
  69. Moisture in valve cover
  70. 540 build exhaust question
  71. Stainless marine to stellings width issues?
  72. Changing gear oil in mechanical fuel pump in 525EFI...
  73. Question on intakes
  74. Carb CFM
  75. 525,600,700 header gaskets
  76. 496 water actuators
  77. Solid roller duration vs hyd roller duration.
  78. Spark Plugs 496HO
  79. Did they ever make a 350 Vortec engine with a fuel pump boss?
  80. Merc 700sci
  81. Refinish Bravo One in Detroit
  82. another cam thread
  83. P5 Hydromotive Props on Formula 382 with 500 EFI
  84. Replacement oil filter/cooler lines/USCG approval?
  85. Adjustable guide plates
  86. Is anyone running an in the tank fuel pump?
  87. Were can I get these
  88. Moisture in heads and top side of Valve cover help.
  89. Trim Tabs quesitons
  90. 496 mag HO longevity
  91. extension box on this typ of hull and transom?
  92. cam suggestion
  93. engine oil temp sender
  94. Some videos thought I'd share .
  95. Fountain dash panel labels
  96. Drive shower option
  97. upgraded 500efi shift issues
  98. Impermeable Masking (Type) Tape?
  99. 502 engine build
  100. Extension box?
  101. Sea strainer install question
  102. Some Saturday Motor Fun
  103. 330hp 454 Flame Arrestor work on a 502HO?
  104. Afr heads with PAC 8002 spring upgrade.
  105. Gen V heads on a Gen IV block head gasket?
  106. Carb question. 850 vs 800
  107. LED Docking lights, any experience suggestion.
  108. Carb question
  109. Cam Question
  110. Need boat surveyor in NJ near Atlantic City/Little Egg
  111. Hawaiian jet boat
  112. Does Silent Choice contribute to reversion?
  113. 2.3L whipple blower Safe Limits
  114. Will carb need rejetted?
  115. Blower surge Make it stop
  116. 502 Mag Rebuild
  117. Heads Iron Vs alunimum
  118. Anyone seen gear lube leak out of water intake?
  119. Mercruiser 400 cyclone info needed
  120. Not fast enough, help!!
  121. Used merlin heads worth anything? 1 is cracked
  122. Imco sc -3
  123. Got my heads back fresh with a little clean up and a cam suprise
  124. Mercruiser 7.4 454 mpi overheating?
  125. Gen 6 firing order question
  126. Scorpion rockers
  127. Carb spacer or no ?
  128. Cam identification, please.
  129. Promaxx 320 flow numbers
  130. What Does OSU Do On Gibraltar Island @ PIB?
  131. Muscle car related vacuum advance vs piston speed
  132. Cobra Power
  133. installing imco +3 box, dropped
  134. Stamped Engine ID #'s
  135. Bad set of rings?
  136. Need a pic of p/s pump on 454/502 MPI v-belt engine w/ ProCharger
  137. idle adjustment 575 sci
  138. Injector cleaner
  139. 525 Repair Costs??
  140. Need some advice,procharger or 177blower
  141. Magic VooDoo 39 - any information appreciated!!!
  142. Can someone tell me year this engine is? Serial Number is
  143. engine question, good base or not
  144. Hub kit
  145. Roller rocker debate
  146. Bravo XR Trim Insert Adjuster Positioning
  147. Gen VI 489 +20 build
  148. Need Hydro Hoyst, Air Dock for 38' boat
  149. 604ci Nortech motors
  150. Deleting cooling hose merc BBC
  151. Need Crand HI-6M instructions
  152. Impeller and hose trouble with Hardin pump
  153. 496 crank kit, quality & fair priced kit for home builders. Help
  154. transom straps
  155. 1996 formula 27 sr1 graphics
  156. Hull issues
  157. Bandit motors
  158. Help identifying engines
  159. Manifold Longevity
  160. hp 500 carb question
  161. Oil Pressure
  162. anyone know this guy on here
  163. SSM Exhaust
  164. Hynautic Steering Question (Not smooth when wheel turned)
  165. Transom Plates
  166. Arneson Drive traits
  167. 1981 Scarab S Type 330 TRS. Outdrives can easily move either direction not running.
  168. Premature main engine bearing failure mystery
  169. Lobe separation
  170. AFR 300 magnum prices
  171. Needing help with h i n #s help help
  172. Teague 825 EFI Vs Merc 525 Supercherged Stage 1 Whipple
  173. Whipplecharged 540 maintenance
  174. blower height above crankshaft
  175. Professional Motor rebuild question...
  176. Converting to closed cooling
  177. Oil pressure sending unit mounting orientation
  178. Question on bravo gimble
  179. distributor gears.
  180. Converting EMI Thunder wet passage riser gasket joint to dry.
  181. Magic 28ft Deck Boat 525 Whipple Upgrade
  182. Pulling 330 TRS Engines tips and tricks been awhile 81 scarab S Type
  183. Hey Full Force Tim
  184. Daytona
  185. Supercharged 540 Camshaft
  186. Overheating 350 in 1977 scarab 300
  187. No wake zone low speed miss
  188. Manual oil temp control??
  189. Gen v 454 merc mag efi cracked block, replace block or entire engine??
  190. Help - Need parts for a 7.4L/454ci GM Delco Voyager EST Distributor
  191. When should heads be rebuilt/serviced with closed cooling ???
  192. Please help! 89 Johnson 90hp
  193. Who wants to play
  194. rocker studs bb gen 6
  195. Sonny Leonard Engines
  196. Battery boxes
  197. 525 intake manifold vs 502 Mag intake manifold
  198. Manifold question
  199. Cam question (Whipple 500efi)
  200. Solid roller lifters?
  201. DO cool fuel lines go bad? Got a kink in one of mine.
  202. Drive and Tab cable length for 81 Scarab s type.
  203. slop in throttles 81 Binnacle mount single lever twin throttle shifters
  204. Better option for Fuel Filter/Water Seperator?
  205. Stem Pocket Lines on 502 MPI Intake
  206. 6.2 mercruiser valve springs?
  207. Machine and weld exhaust
  208. Any 28' Powerplay or 29' Phantom experts??
  209. Silicone hose for exhaust?
  210. Compression ratio
  211. Hydraulic vs hydraulic roller.
  212. is there a gas grill website like oso ?
  213. SBC cooling question?
  214. 496 MAG ECM on a 496 MAG HO??
  215. Bravo 1 496 Mag Exhaust Riser Question
  216. Solid roller adjustments or check intervals?
  217. Hp3 GM racing 2005 525 motor
  218. Pro comp bbc intake min CSA vs 454r min CSA and minimum to maximum differences
  219. Valve cover differences
  220. best vinyl conditioner
  221. Bravo Drive oil cooler-Drew Marine Cool Swirl
  222. Thumping idle
  223. Swim platform for a Switzer 24SS
  224. 525sc Rebuild
  225. roll off work on...
  226. 525 Fei Crankshaft
  227. Ignition
  228. how much power can stainless marine take
  229. Where can I get a small piece of Corinthian riviera red carpet
  230. Rebuilt HP 500 carb motors
  231. Anyone know these shifters?
  232. Mercruiser 496 Fuel Pressure Regulator-2004 Cool Fuel
  233. Anybody had your fuel pressure guage pegged?
  234. Scorpion Rockers... good, bad?? ugly? long life??
  235. tranny cooler plate....how hard?
  236. Aluminum head valve seat material??
  237. Mercruiser cyclone 400 manual
  238. Dana marine exhuast
  239. Replacing cylinder heads on a 500efi?
  240. Tips for Pressure Testing Headers
  241. -12 bungs
  242. 28 daytona eliminator and procharger fitment
  243. Dart block oil temp
  244. Stainless marine exhaust Q
  245. Alpha Cutout Switch NOT Working
  246. NA pistons
  247. Low speed cavaition, what would it feel like ?
  248. Bravo III prop nut
  249. What's the difference between 35-16595Q and 35-16595 and WIX 51515R
  250. Why don't boats have multi-speed transmissions?
  251. Replacing valve body on steering arms at transom anyone done this job tips?
  252. Verado 350 rigging manual.
  253. Mayfair extension box
  254. Daytona Ignition data logging. Engine tuning.
  255. Hard start 540 whipplecharged
  256. Quick question
  257. Mercury 520 / 540 / 565 opinions
  258. milkshake on dipstick... what now?
  259. Too much Bow Lift.
  260. Do all Merc Racing oil filters have ADBV?
  261. Internal tie bar???
  262. Vinyl Wrap?
  263. Winterizing?
  264. Getting reversion and need some advise
  265. Corvette boat conversion...any info
  266. 3.0 L 250hp EFI Mercury outboard
  267. Are Sea Strainers Necessary In My Situation
  268. Freevalve Update - Camless Engine
  269. Sniper intake results?
  270. Oil level question
  271. Cam Specs
  272. teague pop up add
  273. idler pulley
  274. merc gear lube
  275. Hardin SS Exhaust Flappers......Alternative?
  276. Hydraulic Steering help.
  277. 500efi Saga Continues
  278. Timing question (setting initial/total)
  279. Roots blower top pulley not lined up with crank
  280. Merlin BB heads
  281. Engine builder wants $3000 more for Merlin block?
  282. Lets play the HP guessing game
  283. MSD Control Box wiring
  284. What are the chances of getting parts back from a engine builder
  285. Ilmor Oil Filter
  286. 502 harmonic balancer
  287. Any thoughts on how easy making power is?
  288. 572's with inter cooled 14-71's
  289. Compression numbers all over map on new , not yet broken in kongblock
  290. Marine Bluetooth 4.0 receiver
  291. 598 Engine Advise
  292. Valve springs
  293. Cylinder Head Volume: mercury 525 efi
  294. twin outboard V setup
  295. Is an air gap manifold needed?
  296. New 540 Combo
  297. Engine swap
  298. Anything to prevent where the outdrive "rubs" the gimbal ring
  299. Potential soft floor issue?
  300. Another Procharger needed ASAP!!!!
  301. 700 sci shift interrupt switch
  302. K plane sending units
  303. Valve seat materials
  304. 496 HO randomley turn off/on video
  305. Goodmorning from Italy!
  306. Clay Smith cams???
  307. What valves to use in EQ320 BBC heads?
  308. MEFI 4 to Nema
  309. 496HO problems looking for input.
  310. 454 oval port build results
  311. 2000 500EFI - Fuel Issues - need expert advice if possible
  312. Mrercury 700 dropping boost
  313. Converting from crossover to circulating pump.
  314. 4.3 Gl volvo ignition problem
  315. Afrs vs temp
  316. 38 ft mates cat. Aka cat scratch fever
  317. Dayton, Ohio
  318. Winterize with Super Chillers
  319. Jumping power hatch switch
  320. Motor Issue WOT 4000RPM
  321. 588 Idle Question
  322. New engine issue
  323. Alignment question with off shore mounts
  324. Waterjet system at transom of the ship hull
  325. SBC oil bypass question , reuse ok and orientation ?
  326. Rear Anchor
  327. Raylar 540 cu Short Block 496 upgrade ??
  328. holley throttle cable bracket
  329. What should a healthy vacuum reading be on 525 EFI?
  330. Exhaust manifold choice
  331. Couple videos for you guys
  332. I do believe I got bit by my purchase...
  333. Oil bypass question
  334. 496 Exhaust Risers on 6.2MPI's?
  335. Electric Hatch Actuator, Solenoid?
  336. What to do With My MK Cams
  337. DIY Winterization
  338. quick fuel carbs
  339. Drive setup on 30' Advantage
  340. Livorsi oil pressure gauge problems
  341. Some carb / intake info
  342. 509 MPI Starter
  343. Sonic Vendetta
  344. Help picking out a cam...
  345. Boat preparation for hurricane?
  346. Solid cam VS hydraulic VS short travel hydraulic?
  347. 4500 series intake that also has 4150 bolt pattern?
  348. facebook powerboat swap shop
  349. 2.3 on a 502
  350. Suggestions for a 35-38 cc under 300k?
  351. bell housing bushings
  352. Sealant / adhesive for sealing foam gimble gasket to transom
  353. Cleaning White Upholstery?
  354. Best Gel-Coat Repair
  355. Phone borescope...kinda cool!!
  356. Hardin Seaward 525 replacement exhaust
  357. Replacing Water distribution valve.
  358. Winterizing - battery maintenance
  359. 32 maelstrom
  360. Custom cam thread
  361. Fram XG5 502 MAG MPI & 20W50
  362. Would you rebuild those 500 efi with those readings?
  363. Merc Gen 3 cool fuel filter
  364. Need some help - Port motor not running
  365. Hydraulic steering
  366. How much reversion is too much??
  367. Gen1 Stainless MArine limitations??
  368. Four Winns Liberator 211
  369. Sc scoripion. Lots of questions
  370. Using freshwater flush port to winterize
  371. MEFI 4B CD or Download Needed
  372. 496 HO Question - What are these and how should they be adjusted?
  373. Give this 502/509 Combo Some Thought
  374. What Carbs would you buy
  375. Fighting a miss under load
  376. The curse continues... Brand new coupler slipping?
  377. Best Carb Spacer 4 hole or Open?
  378. Merc Smartcraft mpg... U.S. or Imperial?
  379. Water in hydraulic trim system
  380. Go badgers.
  381. US gasoline power beginner questions
  382. Heads/Cam or Supercharger?
  383. Water Traps in the Fuel Tank?
  384. best hole shot Trim tab position
  385. AFR numbers what's good and what's bad ..
  386. Bmax drives input
  387. gaffrig silencers
  388. 525 Edelbrock head
  389. 502 oil issue
  390. Setting the base timing on rebuilt 500 EFIs???
  391. 6.2 MPi
  392. Engine Air Temp
  393. Looking for engine builder in ct area
  394. Mercury 600SCI - Engine Fault - IAC Output
  395. Stainless marine exhaust converted to dry? Gains?
  396. Dyno... Marine trim VS Dyno (race) trim
  397. Upgrading fuel lines due to age and upgraded engine
  398. Repower/ long lock opinions
  399. Mercury 520 Performance upgrades
  400. 454 suddenly stopped, abruptly, would not even turn over. Took plugs out and
  401. Boat plugs out with pipe dope
  402. Boat plugs out with pipe dope
  403. Powerquest razor 22
  404. Aluminum heads
  405. Cam and valvetrain longevity....??? low duration high lift...
  406. Mercruiser 470 stalls after it has been warmed up. Wont idle under 2000 rpm
  407. Going from 5.0 to 5.7 or 6,2 SBC
  408. Opinions on rewiring engines
  409. Fluctuating engine temperature in my 2000 7.4 mpi Mercruiser Bravo 3
  410. 1075 sc cam in a 565 NA build
  411. How to clean oil coolers
  412. Need a boat brought to Florida from the NH area.....
  413. Mercruiser 7.4 LX MPI Intermittent Overheat
  414. Driving thru chine walk
  415. recommends on engine oil
  416. Lightning or GiL
  417. Alternator only charging one battery while running - Scarab 33 AVS???????
  418. Wow I heard of msd issues. But dam.
  419. How fast can I go
  420. 500EFI Help!
  421. Horsepower VS Torque
  422. What are you guys using for water PSI and vacuum line?
  423. Acceleration and efficiency
  424. Bravo 1 outdrive sagging help
  425. Spun Drive coupler (or whatever the proper name is)?
  426. Larson Senza Spectre
  427. 496 HO sounds much louder when cranking
  428. Anybody know where I can get a 500 EFI Rubber seal for Throttle Postion Sensor?
  429. Need Help finding Power Steering Pulley
  430. Typical places oil leaks occur in the port side rear of the engine
  431. smartcraft alarm question
  432. MEFIBURN tuning help
  433. Slight poping sound out exhaust. Comes n goes. See first post. Spellcheck
  434. Cause has developed slight piping ish sound.
  435. Faria gauges on early merc smartcraft
  436. SBC hydro locked, water in #1 cylinder
  437. 600SCi 5 beep alarm
  438. faria tach setting
  439. Loading up at idle
  440. water hose to helmut connection
  441. 500 efi dipstick loose
  442. 500efi help
  443. Water in oil.
  444. Turbulators for Gil exhaust
  445. AFR 325 flow sheets.... anyone ever flow these heads?
  446. Anyone run 108 LSA cams in boat before? 700 HP DYNO proven combos welcome...
  447. Worlds fastest boats
  448. late '01 496 HO poor idle/occasional stall in nuetral at idle only
  449. 350 Mag engine wake up
  450. 525 hp
  451. 32 fever steering cables
  452. Baja 232 Voltage Issue
  453. oil cooler with built in thermostat
  454. 2002 Baja 29 Outlaw Fuel Vent Question
  455. Header tube discolouring, what should I do?
  456. Wierd sea water hose problem
  457. How much timing advance should I run?
  458. Stainless Marine manifolds SBC power steering line in the way
  459. Loosing fuel pressure
  460. I'm cursed!
  461. Cams size
  462. shipping a outdrive
  463. 500 HP Intermiten Idle Issue
  464. show me your Fountain speaker locations
  465. 575 sci
  466. Older 575hp 540ci merc bulldog engine knocking
  467. 1995 502mpi won't start when hot
  468. New style and old style 525
  469. Bravo 3
  470. Detonated piston & blew head gasket. Now what?
  471. frictional losses of 4.25 stroke motor vs 4.0 stroke
  472. efi for supercharger.
  473. Reoccurung water pump failures...
  474. Mag efi
  475. Mercury 525 Rocker arm replacement
  476. Oil pressure flutter at higher rpms.
  477. Do anti-reversion dams work?
  478. Replacement steering Verado 400R
  479. Hydraulic Hatch Actuator
  480. Oil Pressure Bypass Valve Question
  481. slip %
  482. Pre-Filter Oil Filter Screen - YEA or NEY ?
  483. Power steering pump fitting Aeroquip?
  484. Catalyst elimination for "test purposes"
  485. whats the torq spec for bravo transom plate?
  486. Msd total timing procedure when locked out
  487. A little more Tinkering
  488. 502 MPI intermitant no start when hot.... not fuel prob
  489. Fuel Coming out exhaust
  490. Hammer knocking noise when in gear over 3000 rpm
  491. Will MSD digital 6 work with thunderbolt distributor?
  492. Holley Commander 950 mpfi won't fire!
  493. Thunderbolt V ignition, will big block module work on a small block?
  494. need part # for hose transom to sea water pump
  495. GM Fastburn heads, any experience with these?
  496. Weber carburetor
  497. new 540 water in oil
  498. Vessl View & DTS
  499. Push rod retainers.
  500. 5.7 timing with comp 270 cam