View Full Version : General Q & A




  1. whipple oil change
  2. Long road trip to FL tips needed
  3. 800sc
  4. Mayfair external steering kit
  5. Head Gasket P/N for 088 on Gen VI
  6. Switchable Tips
  7. 78 Python 24ft value?
  8. HP 500 rebuild cam question
  9. Drive Lube Reservoir Fitting at transom breakage
  10. 2004 350 MAG MPI cam, ecm upgrade?
  11. Taylor vs polyfoam
  12. Fuel Stabilizer + 93oct + Boostane = ?
  13. Hydraulic Steering Reservoir
  14. 525 sc valve cover gromets
  15. Does anybody run twin EFi engines with multiple fuel tanks?
  16. I need to paint a couple of aluminum pieces. What is the best spray paint? thanks
  17. used pro chargers in classifieds?
  18. Pyro's and O2 sensors
  19. If you ever cut open a PCV valve
  20. Verados and DTS
  21. Manifolds hit headbolts.
  22. Cockpit Communication Radios
  23. 950hp n/a twins...
  24. Exhaust riser adapter / spacer question
  25. which head gasket Mark IV - cast iron heads
  26. Question on GIL exhaust/turbulator
  27. Trim Tab re-install
  28. Cam selection
  29. modified 502mpi intake on 502 dyno session at my shop
  30. mpi and efi intakes?
  31. Head Gaskets
  32. Q
  33. HVAC question
  34. 1 inch longer head blots for darts
  35. Thru hull fitting for trim cables.
  36. wanted Diacom record file of stock Merc496ho idle to WOT
  37. Boat city prop??
  38. #3 drives on TRS BOAT IS IT WORTH IT???????????????
  39. Camshaft for Mercruiser Cyclone 440hp
  40. 454 mag piston dome cc's
  41. Gen v fuel pump
  42. GGB muffled exhaust tips?
  43. AN fitting size
  44. Builder used different cam than specified.
  45. K-Plane 280 plug
  46. Mercruiser 377 Blues
  47. Dart big m sportsman head gaskets
  48. 460 Commanders to a Bravo drive?
  49. Question on fuel lines/hoses - non coast guard approved
  50. TBS 871 to BDS 1471 questions?
  51. 1997 7.4 bbc
  52. Marine Lubrication Update Thread
  53. LeakProof
  54. imco extension box question
  55. Effects on cam advance/retard
  56. cutting runner length of 502mpiMag
  57. 6.2 mpi
  58. 42 Tiger adventure begins!
  59. Ge wiz. What am I going to do with all this lottery money. I'm going to win.
  60. why stainless steel rocker arms?
  61. Transom water pickup any advice ?
  62. Diesel offshore racing boat
  63. Input on which roller rockers - BBC
  64. 1990 Guest 2540A charger documentation
  65. 454 Build Help Please
  66. Outdrive repaint what putty can be used ?
  67. Solid roller lifters with bushing wheels whos running them in a high lift cam .750+
  68. Where to buy Transom HD Assemblies? A business is jerking me around!
  69. Mercury 700 SCI & Whipple Upgrades
  70. Merc engine start/control help
  71. SBC cam spec help!!??
  72. For the LS engine lovers
  73. Stock Oil system routing. 420, 450, 500, 525sc.
  74. Will the bi-directional circulating pumps work the same?????
  75. bolster seats
  76. Which carb adapter plate? Merc 454
  77. CFM on the 500 EFI Heads?
  78. average price on removing and reinstalling twin 502s?
  79. Impacts of hitting rev limiter?
  80. Spark Plug Recommendarions
  81. 525sc
  82. Distrance Between Transom and Stringer Mount Bravo
  83. 06 496 Mag exhaust, stock or not??
  84. Best 33c cable?
  85. 93 scarab sprint 18 with a 3.0 lx and alpha1 gen 2
  86. Scat stroker kit quality question
  87. 502 MAG EFI MEFI 3 wire harness
  88. Mercruiser 454 serial number info
  89. Exhaust systems
  90. 350 mag exhaust issue
  91. 525efi - mechanical fuel pump oil change
  92. Clean up engine wire harness
  93. Are Strykers any good??
  94. Change oil and takes longggg time to build pressure
  95. ehuast tips
  96. 2.25 valves too big for 454
  97. 500 efi ecu upgrades what did you gain?
  98. Boat detailer recommendations in North Dallas
  99. HP525 ECM Question
  100. Roller Cam Bearings?
  101. Looking For Advice On Hydraulic Steering!
  102. What's out there for big sea strainers?
  103. Bulldog cam problem
  104. building 375-400hp 383 stroker
  105. K-planes travel question ( angle )
  106. Gen VI oil valve question
  107. Drive height question/Prop Slippage
  108. Read this before posting in this section
  109. 496ho exhaust
  110. Soot on transom after fuel filter change
  111. Battery explodes! Why?
  112. O2 sensor question?
  113. hylift johnson lifters.
  114. Texas Winterization
  115. Need electrical diagram help 03 496 MAG alternator wiring
  116. Liberator 241 engine options
  117. 502 mag high pressure line
  118. Piston dome cc
  119. UPDATE! Water driplets and stains inside SS Exhaust riser
  120. LED Transom Lights
  121. Drives..turn IN or OUT??
  122. Converting an old school Gale Banks Twin Turbo system to modern technology
  123. Need some gimbal parts before installation advice please
  124. need a little 496 winterization help. kinda, and another question.
  125. 500efi power steering
  126. 500 efi engine badges
  127. Milling of an intake
  128. Most hrs on a Gen 1 verado 225, 250, 275 motor
  129. Piston pic.
  130. switchable exhaust tips vs silent choice
  131. Oil Pressure Question... Nothing broken but chasing an oddity
  132. Teach me about Exhaust riser angle Please.
  133. Engine/Outdrive Swapout
  134. 1989 23 nova xl wellcraft side engine vent inserts????
  135. Rods
  136. Need 525 EFI Flush Kits
  137. What's this ?????????
  138. Widebands
  139. Bravo Bellhousing to Inner Transom Plate
  140. File fit rings
  141. Head gaskets
  142. Log to Centerise Exhaust Manifolds
  143. Manley Nextek springs? Anyone?
  144. Procharger boost 91 octane
  145. What type EGT probes
  146. Merc 420 to 525sc in a Formula 242.
  147. Pulling a motor from the flange of a 177 wieand
  148. fountain 33 vs 29
  149. Exhaust issues Gil/bulldog 500 bbc stainless risers
  150. intake suggestions for 365 mag build into 420/450hp
  151. Cross over kit
  152. impulse II cam thread
  153. Milling heads for compression
  154. installing gil manifolds
  155. Torque #'s
  156. pump gas 540...
  157. Cam choice
  158. What do you think about this engine in the calasifieds 1209HP
  159. Dash redo, gauge less options.
  160. Single engine in a Four winns liberator 261?
  161. Getting water to a motor with no outdrive on it??
  162. Melling 10778 oil pump question
  163. Cam question
  164. 525sc cam info?
  165. Ok, we need a new thread: quench
  166. Looking for best Bilge Paint. Can you recommend?
  167. gen 6 555 ci oil pans
  168. Starting motors that havent ran since 2007...
  169. 7.4L MPI Won't Start
  170. Go To Bilge Pump and Float Switch?
  171. Anybody running Gen 1 verado's?
  172. 500efi thermostat replacement kit
  173. Jandsafegard Interceptor Knock Controller - Anyone Using This Product?
  174. Ignition dead on 525sc
  175. Dead ignition on hp500efi
  176. Are HP500 intakes brass lined?
  177. 310 cc heads
  178. Is filling fuel tank really necessary when winterizing?
  179. 6.2 whipple stage 1 ecm reflash
  180. Need A Part #
  181. Detonation Issues - "Why is the Gen 7 496 such a bad platform to build"
  182. cast aluminum merc 8 quart pan oil pick up part #
  183. Water Flow - flush kit vs. lake
  184. 575sci running rough
  185. Will low oil hurt 500efi?
  186. Saginaw to Brazilian actuator question.
  187. 500EFI Intake modification/adaptation to Pro Flo EFI
  188. Water driplets and stains inside SS Exhaust riser
  189. Tuningparts for newer 8.2 Engines from Merc available?
  190. Will a plugged exhaust cause an engine misfire?
  191. 377 Blue Scorpions
  192. Compression test readings
  193. Shifter plate question
  194. 500 EFI fuel pump oil?
  195. Inconel exhaust valves, when do you need them?
  196. Aluminum head corrosion
  197. Procharger fuel system
  198. Do the headers on 2001 500EFI have ports for oxygen sensors?
  199. Spark plug gap with MSD
  200. Carb guys and/or fuel issue
  201. Pulling an engine TRS SETUP
  202. deciphiring Crane gold rockers
  203. -2 Outdrive performance gains
  204. Fountain 29
  205. X-Power Drive
  206. KE lightning top end kits
  207. Noisy clanking exhaust tips.
  208. Power steering pump delete kit
  209. Cooling system
  210. 525 coolant recirculation pump
  211. New to forum. Need help
  212. Merc 8.2 HO Flame Arrestor Flange Diameter?
  213. Boat Lift Question
  214. Power Steering pump delete kit. Gen 6 motor with serp belt.
  215. Locate a PROPSHAFT DYNO in Midwest???
  216. Reality check for repair quote
  217. fuel injector cleaning&testing
  218. rebuild time
  219. Clogged block drains
  220. 500efi
  221. 42 fountain staggered conversion: need exhaust help
  222. WHat ECU to use, Megasquirt 2, Microsquirt, Accel 7 or other?
  223. How many hours on bigger power stuff?
  224. E10 or E15 ethanol blended fuel and aeroquip/earls stainless fuel line problems
  225. Anyone have personal experience with the Professional Products/ Pro-Comp intakes?
  226. Engine alarm Help
  227. 454 making 525-550hp
  228. Lighting Header repairs?
  229. Full Hydraulic Steering
  230. Offshore style engine mount
  231. NLA mercruiser exhaust valve seals
  232. surface drive on a pontoon?
  233. MEFI 3 (16237009) vs MEFI 3 (16236999) help needed
  234. Procharged outlaw 25, no getting power to prop
  235. problem with aftermarket cylinder heads.
  236. 502 pistons
  237. Top end work on blown 540s - what eats exhaust valves?
  238. Inteior Vinyl Surface Mildew Remover
  239. PSE superchargers
  240. Differences between Gil exhaust manifolds and 496 exhaust manifolds?
  241. Electric fuel pump question
  242. Engine builder/ Machine shop in michigan???
  243. Livorsi Control Problem
  244. 496 Stroker...irratic rpm..stalling
  245. Looking at a used boat purchase?
  246. Feedback on Arizona Speed and Marine 575SCi calibration
  247. Crossover pipe (coolant) question.
  248. Out of the box heads?
  249. Price to have motors pulled?
  250. Whippled 500efi refresh
  251. Mercruiser 496 Starter issue
  252. 540 engine vacuum question
  253. What do these bearings tell you?
  254. Sea strainers and blockage ?
  255. 100LL aviation fuel in a Mercury 300x
  256. Rusty bilge water.
  257. Cam Suggestions for a 540
  258. gpm of water to run a mercruiser on hose
  259. How do you test/diagnose fuel injectors ?
  260. Prop Shaft seal in a SXC 4
  261. Engine rebuilders in the Chesapeake region.
  262. 502 efi heads
  263. 496 Cool Fuel Pumps
  264. Finding new steering cable
  265. Upper swivel shaft nut wrench size.
  266. Shaft Mount rockers (Brands)
  267. What does this flush out?
  268. Rocker Ratios...variances
  269. Headers?????
  270. CRT rotary trim question
  271. WTH? fuel issue? weird! fuel pumps going out?
  272. Good transaction with smokin gun!
  273. AFR 265 Heads any thoughts/experiences
  274. New Production Small Block
  275. Bad tach causing a miss on an hp500 Carb engine
  276. Adjusting Morel lifters revisited
  277. Bravo 3 Catastrophic Failure
  278. Transmission tube
  279. 1994 350 MAG, roller cam or not?
  280. 1989 22 scarab
  281. Spring oilers
  282. Looking for a Mercury HP 420 Engine Setup
  283. checkmate winshield
  284. throttle, shift, and indicator cables
  285. Confused about 500 EFI valve breather plumbing
  286. Supercharger recommendation for 575SCI
  287. Who makes wind deflectors like this.....
  288. Need Cros-reference help for a hard to find part
  289. Back yard engine builders.
  290. 454 Flywheel
  291. Bravo 3 clunks when engaging in gear
  292. 502 compression specs
  293. Johnson Hydraulic Roller Lifters
  294. Will VIN. tell 496 engine HP.
  295. Valve spring pressures
  296. mechanical fuel pump
  297. 502 MAG MPI exhaust and cam options
  298. Those cool black carbs
  299. 500efi computer
  300. Sparks
  301. Broken output shaft & coupler
  302. Hydraulic Followers best?
  303. Hp500 carb to efi conversion questions
  304. Who does good job on Carburetor Rebuilds?
  305. Spark Plug wire question
  306. Alternator Temperature
  307. Kiekhaefer throttles issue
  308. Card in spokes noise from back of engine
  309. 572's with 50 degrees total timing???
  310. Water distribution tube for exhaust
  311. What happened
  312. Mercury 600sc???
  313. Merc 700sc Idle Air Valve on Supercharger
  314. Engine Stumble at 2100 RPM
  315. Why is the Gen 7 496 such a bad platform to build
  316. Please any Help/Input/Advice -500 EFI
  317. My serial number
  318. Torque spec for prop nut on Mercury #6 drives ?
  319. Cutler efi
  320. Head gasket for Vortec Charger application?
  321. 350 vortec weber/edelbrock style carb question
  322. Generators
  323. Seller claims 454 Magnum 420hp stock - really?
  324. Which EFI system would work best/be the most simple
  325. What to look for when picking a CAM
  326. Looking For Exhaust Diverters for 496HO
  327. Looking for a race boat
  328. Cylinder #5 sucked water due to crap header. What next?
  329. Exhaust tips
  330. Mallory Marine YLM Series Magnetic trigger distributors, setting the dwell?
  331. Mechanical trim indicator card is off, are others like this too?
  332. Props Blowing Out - Drive Height? (Pachanga 22)
  333. Hardin Marine Hydraulic Steering Filter
  334. 500hp carbed thermostats
  335. New Carbs or Covert to EFI?
  336. RPMs at WOT
  337. hydraulic helm piping
  338. Hour meter questions
  339. Elevation Question on Performance
  340. Volvo dpx drives
  341. Holley 1050 or Quick Fuel 1050
  342. Oil Question
  343. 2004,496ho questions
  344. looking for a pair of motors to replace my pfaffs ,,
  345. 25 baja outlaw, putting whipple on
  346. 454/330 to 496 stroker
  347. Richelieu trailers
  348. Storage
  349. where to install WP relief valve
  350. HELP with Fragola hose and fittings
  351. Is 40psi enough oil pressure?
  352. Bravo XR Gear Ratio
  353. 305/350 Conversion issues/concerns
  354. Perplexing Oil Pressure Question
  355. Going back to stock fuel and pcm.
  356. 1988 vintage 280-K Trim Tabs
  357. Oil Pressure Perplexing Question
  358. Fuel pump question
  359. I need help with ECM questions
  360. any truth that stepped hulls MUST have low water pickup drives when using bravos?
  361. Locking Out a DUI Distributor
  362. 625 Ilmor
  363. Opinions on Cam shaft
  364. 496 Mag hesitation issues...
  365. Cigarette Draft
  366. 4500 vs 4150 on a 540
  367. gimbal bearing part number
  368. Scarab throttle/shifter?
  369. sea pump/fuel pump maintenance - how to?
  370. 900sc with Stainless Marine Gen III
  371. Alpha One Gimbal bearing seal question
  372. 454 Mag MPI Milkshake With Low Compression on 1 Cylinder
  373. Fuel pump question,
  374. Mercury racing 502 efi- head work- valve springs
  375. Mirage plus hub kit
  376. Marine (reputable) engine machine shop in the Southwest Indiana/Midwest area
  377. New gauges how to?
  378. Freshing up a pair of 420's gen4
  379. What ADD-ON hydraulic Steering is best to buy??
  380. Drive question
  381. New to boating. Looking at AT tantrum
  382. Best aluminum head?
  383. Steering turns lock to lock?
  384. What aluminum heads would be an upgrade from iron vortecs? Looking for more TQ and HP
  385. Intermittent 525 alarm at idle
  386. educate me
  387. No "fuel" issue & Mercruiser EFI 502 Info Needed
  388. sea water / fuel pump rebuild........help
  389. WHELP, time for a new motor/rebuild...Recommendations????
  390. Carburetor talk.
  391. Fountain Spitfire
  392. Pop Yachts to buy a boat? Whats the value in this?
  393. Internal Flappers
  394. 454 head
  395. 500HP Remote Oil Filter Adapter Leak
  396. 502 efi gen V running rich
  397. Stroking gen V's
  398. 502 Procharger fuel system setup problem
  399. Which header for my set up
  400. Oil temp question
  401. New Mercury 600 starting problems when hot
  402. Gev IV 454, modern fuel and timing
  403. Map sensor
  404. Question for the carburetor guys?
  405. Helping a friend - '97 Merc 5.7L LX Alpha - dead miss
  406. Question for those that have changed plugs on 496 MAG or MAG HO
  407. oil cooler flow direction
  408. 575SCI's, Thermostats and high temp alarm.
  409. 2000 502 mag mpi high oil temp????
  410. Engine Clearance Question.
  411. need advice on electric fuel pumps
  412. Crossover kit
  413. Engine stalls after returning to idle
  414. Got my engine idled down but now it is hard to start and has trouble staying running
  415. 496ho Losing Speed
  416. Oil pressure issue
  417. How to tell if transmission is going out
  418. Decipher beeps on Merc.
  419. Closed cooling for 800+hp
  420. Sea Water Pressure Sender Location?
  421. Hatch lens replacement help.
  422. Where are all the factory take outs??
  423. 502 MPI - Hot Boat Write Up
  424. What plugs to use on a aluminum head ?
  425. Boat floor repair or replace?
  426. Gill exhaust
  427. 502 Cast iron head and cam upgrade
  428. Speedmaster 2 outdrive will not mount back up
  429. MCM 5.7 Thunderbolt V.What Flywheel?
  430. (Carry On) A/C Options
  431. 2001 EFI 260 Mercs---- Thinking of procharging. Pros and Cons requested??
  432. 525EFI Steaming out exhaust after ITS install???
  433. 2000 Mercruiser 502 mag mpi engine scanner....where to get one?
  434. Best way to attach Merc cables to a Demon Carb
  435. Talon wouldn't fire yesterday at the ramp
  436. CMI E-Tops to Corsa Silent Choice
  437. Fountain won't plane out all of sudden
  438. T Bolt 5 plug and harness
  439. 2006 Indmar 383 with SPN 66017 code
  440. 05 496 HO cutting out
  441. HELP! 7.4 Merc dies all of no where!
  442. Baja 320 with a trim pump that just clicks
  443. How to install oxygen sensor bungs.
  444. Adding oxgen sensor to Gil riser
  445. 525sc height
  446. One side of crossover hot other cold. No Temp
  447. Pick up location with a notched transom?
  448. 500hp question carb to efi
  449. Help! Engine wont build rpm
  450. 350 magnum Engine head and cam upgrade
  451. Oil temperature issue
  452. BAHA 340 Mach 1 Combo
  453. gil tail pipe question
  454. Blown Bravo, need advice...
  455. AN fuel line question.
  456. pre alpha transom assembly will alpha 1 drive bolt up
  457. intake manifold heigh
  458. weiand 177 on 454
  459. my brothers 525 sc . get to 3500 and just spit and spatter
  460. Going freshen up 420's
  461. Cause of lifted ring lands on pro charger motor
  462. Cause of lifted ring lands on pro charger motor
  463. LT1 MEFI 2 question
  464. 500efi alternater
  465. Mercury 496 Mag trouble, need help
  466. Best place to buy AGI box?
  467. What happened to the beeper
  468. Twin aluminum Small Blocks good idea, or a bad idea?
  469. Hours reading wrong....Ideas???? please help
  470. Power steering issues after installing single add-on ram
  471. Shift cable Questions ?
  472. Mercury Engine Code
  473. Mercury 700' consumption &constant use in salt water
  474. Carrier bearing flange
  475. Scarab Thunder fiberglass swim platform??
  476. 500 EFI water jackets possibly plugged with mud.
  477. Alpha gen 1 vs gen 2 & TBIV vs TBV
  478. Need Advice On Blower Pullies & Belt Size
  479. Trim Tab Pump worn out?
  480. Steering options for bravo with HP Gimbal for 20' used boat
  481. 2nd Power steering pump smoking and leaking.
  482. water in chamber
  483. EFI Fuel Plumbing - Best Practices
  484. 454 mag mpi 385 hp Gen V 1992
  485. Trim tab pumps
  486. help finding a rebuilt mercury 500 EFI for a fountain
  487. my fountain is officially for sale complete minus hust the engines ..
  488. Oil coming out of hp500/525
  489. 496 HO 2 beeps per...
  490. 540 ci bb chevy blower timing
  491. Most boost/reliable hp anyones made with a block without extra center bolts on heads
  492. Mando Alternator question, on 502 MPI
  493. Engine Knocking 4000 RPM
  494. Need a compact alternator - 496 manifolds on 454 Mag
  495. 572 Blower Motor Knock Sensor / Misfire Problem
  496. 525 EFI Replacement Spark Plug Wires Needed
  497. Baja 442
  498. 225 mariner 3.0 carb'ed issues
  499. bad prop slip on baja 240 sport
  500. Best afr gauge and O2 sensor