View Full Version : General Q & A




  1. 8.1 GXi Audible alarm and rough idle
  2. Ha ! Oil Know It All's Can't Know It All Cause Oil Chemists Don't Really Understand
  3. 6.1l crankshaft
  4. Carb opinions 540's 700 hp...
  5. 700SCI Fuel Pressure
  6. Raylar 511cid Stroker Kit for the 496?
  7. What Thought Crosses Your Mind ?
  8. Accessory brackets
  9. 92oct. VS. 90oct. non ethanol?
  10. 2004 288 Sunsation 280 Trim Tabs
  11. What to use to glue the cockpit sole down?
  12. 575 sci Idle Air Control
  13. o ring distrbutor
  14. Gafrig VS livorsi sending unit
  15. private sellers opinion on buyer wanting survey
  16. 22 razor
  17. Kiekhaefer Control Cables
  18. Engine Temperture ?
  19. Mercury Racing 600SCI with Whipple Stage II
  20. 454 fuel leakdown, add Holley red or new carb?
  21. 420hp 454 questions
  22. Ranting.... King Race Bearings
  23. Run Dry Impleller Thought's???
  24. Help Merc 700 Header Bolt Trouble
  25. hydraulic steering problem
  26. How do you remove top hinge pin ssm #6 ?
  27. engine swap alpha gen question
  28. ONCE Again trying to find some Imron paint
  29. What would cause 3 intake valves to leak on a diesel?
  30. Putting in a hp500 with harness
  31. 496 Mag HO water circulation problem
  32. 300 verados choking out
  33. Oil filter...
  34. Identifying a cam, help please
  35. Any suggestions !!!
  36. Power vs reliability
  37. HP increase
  38. Attaching LEDs to trim tabs
  39. Big Chief
  40. cylinder head question
  41. Header gaskets
  42. NEED SWIM PLATFORM FOR 88 Forumula 272
  43. 350 mag mpi no spark
  44. Assault heads
  45. Vacum Pumps for crankcase
  46. Windscreens
  47. Optimal Squish
  48. 34' Super Hawaii info? "Hawaii five Owe" in classifieds?
  49. Which blower to upgrade to?
  50. Intake Manifold Gaskets
  51. Camshaft sprocket question
  52. What's the difference between 088 and 2934 heads?
  53. HP500 oil thermostat oil bypass valve?
  54. HP500 carb thermostat aassymbly question
  55. What's wrong with AFR's exhaust port?
  56. Water / Meth. Injection
  57. Bore Notching
  58. What's you're opinion... stroke vs. bore
  59. Fountain Seats Covered
  60. 525 El fuel pump relay?
  61. merc high altitude pulley?
  62. Looking for information on an odd boat predator powerboats
  63. BBC Rocker Arms
  64. DiMarco engine.
  65. Identify these steering rams
  66. forged stock crank; mains .020 rods .030... worth buying or cut too deep?
  67. Ring end gaps
  68. Bypass and blow off valves
  69. Pro filer 375cc cnc heads
  70. 454 HP425 Chevy pistons - what would you recommend?
  71. Fuel Pump
  72. Custom full depth boat covers
  73. Bad Transom
  74. Hp drive couplers questions
  75. marine jobs?
  76. No Wood?
  77. Livorsi guages
  78. 525 sc fuel pump
  79. marine sealant (clear)
  80. 700's whipple #3 upgrade specs ?
  81. Fuel Pressure Boost Combo Gauges
  82. Odds and ends for a Gen IV refresh
  83. Garage door issue...
  84. Procharger intercooler corrosion
  85. Oil thermostats
  86. cheap header
  87. 454 first build. Suggestions
  88. Merctrans question
  89. Y pipe on blower motors
  90. Aftermarket heads do they fit all generation bbc
  91. B&M 250 refresh
  92. What is the right carb
  93. Aluminum Engine Hatch Hinges
  94. Engine Cradles For LS Motors and 426 Hemi
  95. flywheel, from bravo to a transmision
  96. cooling water questions
  97. 350 mag mpi, WOT rpm?
  98. To shim or not to shim valve springs
  99. Seebold swim platform?
  100. Formula 242 rpms and props and such
  101. Bearings - Coated or Not?
  102. Thunderbolt or MSD
  103. Bravo flywheel housing 8 plate oil cooler mounting
  104. Cam Identification Question
  105. hp 500 horse power
  106. Crossover and Thermostat housing for use with Procharger
  107. How much does weight matter?
  108. Anodes for trim & steering rams - Bravo XR / ITS ??
  109. Cmi 496HO header mods
  110. Anybody use the fast ez efi? Or other brand??
  111. Chrome Plating
  112. Carb Selection
  113. Leakdown test procedure info needed
  114. Best Viewing place on shore to watch Boat Races at Key west.
  115. Question for Sonic owners
  116. LS Engine Plumbing
  117. 383 vs BBC in a Baja 220
  118. engine compartment temps
  119. interested in 2014 scarab 30 tournament cc - are they any good?
  120. Merc SC800 supercharger pulley/boost ratio?
  121. Ls..... Engine tear down intervals?
  122. engine dimensions
  123. Outboard motor life and issues
  124. A/C power needs
  125. Fresh (10-20 hrs.) 600 cubic inch motor hours warped all intake valves last season?
  126. speaking of HP estimates, anybody ever dyno stock 330-365-420 and what do they make?
  127. Windshield Replacement
  128. 454 build using peanut ports
  129. horsepower estimate
  130. 300 Verados with 400 hours - any major concerns
  131. A/F Ratio
  132. Merlin Intake on a 454
  133. Templet for 280 K planes
  134. Prop's on a 1990 36 no step 420 power
  135. standard deck to a tall deck
  136. 700 - 750 Hp: Boosted LS vs NA Big Block?
  137. Scarab 29' hull/speed limits?
  138. oil restrictors and pushrod restrictors?
  139. air fuel ratio with boost
  140. Most power out of a 454? PROVEN combos????
  141. Repowering 33 Outlaw with twin 454s: MPI or Carbs?
  142. 700 sci whipple upgrades
  143. Differences between K plane 280 vs 300
  144. Backwards sea pump
  145. 049 oval port heads
  146. Symptom of leaky header
  147. Neutral balance Harmonic balancers? middle of the line?
  148. 502 MAG MPI Cam swap
  149. Still Looking!
  150. Running a boat on the hose in freezing temps?
  151. superchillers
  152. ignition coils
  153. Mercruiser HP425 Gen V Big Block pistons
  154. Did GM sell a 509 block from factory
  155. The trouble with Blowers is:
  156. Stainless exhaust tip flappers ???
  157. What cams will work with stock lifters.
  158. Knock sensors for 502 mag mpi
  159. Another build dyno'd today. Whippled 509.
  160. Compression Ratio
  161. Anyone Been To The Louisville KY Boat Show??
  162. Installing new Camshaft
  163. Nordskog GPS speedometer wiring..
  164. Facebook tech.
  165. 1994 mercury racing hp 465?
  166. 454 cam
  167. The GM/Merc Rectangle port head. Discuss.
  168. morel hyd roller lifters
  169. Pushrods
  170. Who has 575sci TB?? any motor shops??
  171. Big cube n/a combo's
  172. What head should I use
  173. Leaking Trim/Trim Tab Pumps
  174. Engine Guys help (scan tool to use) on 97 454mag mpi's
  175. Diacom software ?? - where to hook up on 525EFI ?
  176. 502's with roller cams have some saltwater spots on them, Replace or run?
  177. 454/502 Mag Camshaft GM # 12551622
  178. 540 Clearances and oil pressure thread...
  179. Identify this raw water pump?
  180. cnc d heads
  181. Piston Mercruiser 496 HO
  182. Machining Fuel Rails
  183. 454 Gen 6 Engine Cam Question
  184. 600SC mechanical fuel pump ability??
  185. Looking to instal a 496 Mag HO where there was a 7.4 MPI
  186. Procharged 502 Mag Oil Cooler Recommendations
  187. Bravo One outdrive
  188. 700hp 540s
  189. 454 rebuild with blower... Pistons and clearances.
  190. Help! - what happened to champion cylinder head co, palm coast, fl?
  191. good rockers for 6000 rpm, 540CI combo??
  192. 525 whipple charged engine weight
  193. Flywheel balancing
  194. Broken xr case repair?
  195. B&M blower identification
  196. noise under valve cover
  197. Need FlyWheels...Internally Balanced
  198. Anyone running Imco powerflow manifolds on ZZ502
  199. TRS Values
  200. any proffestional tile setters looking for work
  201. Prop slip increase with speed.
  202. Oil Pan Swap / Value
  203. Carb vs Fuel Inj?
  204. CMI headers leaking....HELP
  205. anybody with 496 HO using stainless marine exhaust?
  206. Elbow restrictor gasket vs full flow gasket
  207. Would you guys use this?
  208. velvit drive pump
  209. Rubberized spray flooring?
  210. Couple quick questions - piston install
  211. Tuners or Chips?
  212. How many RPM's can the stock 500HP rotating assembly take?
  213. Who is not running 45* valve angle?
  214. In-Control Shifter
  215. Crank to crank measurement / drive centers
  216. Bumpers and ropes???
  217. What oil pan is this???? Gen6 bbc
  218. 87 scarab excel 26 convert to bravo is it worth it?
  219. powerquest 270 laser cockpit
  220. Article about valve angles
  221. New boat soon, 32' BT, 29' Scarab, 31' Scarab, or another Formula??
  222. Piston top displacement stats needed
  223. worth the trouble?? 47 fountain
  224. New carpet for a Cigarette 20
  225. Water preassure in Bravo XR?
  226. Storage of gasoline
  227. conversion i/o to o/b help.... pics... info... anything
  228. Couple quick questions
  229. Grilling go fast
  230. Good mechanic
  231. lightning headers in a 25 Daytona?
  232. Mechanic needed pompano beach area
  233. 502 mag mpi not priming oil??
  234. Turndowns and water reversion?
  235. Fuel Stabilizer or Octane Booster?
  236. Found a 525 short block! What's it worth?
  237. +.300 lifters
  238. Baja 33 Outlaw Parts
  239. Search Tempest - Trojen virus??
  240. The million dollar question
  241. msd
  242. determining oil
  243. EFI 525 rear mounted camshaft sensor???
  244. Merc 700sci hrs/lifespan before rebuild
  245. Roots supercharger intake question
  246. Trouble free 525efi - do they exist?
  247. Different size headers
  248. Blower Application - Fuel Pressure Reg. & Return Valve
  249. 502 Ring Recommendation Please
  250. Good Bad opinion Formula 292 or 312
  251. original motors in a 91 sutphen
  252. Leaking Hatch Rams
  253. Mesa Balancing
  254. HTM oil pressure gauge
  255. Regular or Swept back
  256. Budget 454 Build
  257. 420hp 454
  258. benefits of distributor-less ignition
  259. 454 Repower
  260. 500 efi
  261. Dropping some weight on a HP500 carb?
  262. Any one interested in a boat move New Orleans to Detroit Area
  263. Best Cam Choice - Non-roller 350 with Vortec heads
  264. Steering Wheel rotary circuit switch?
  265. Carb talk
  266. Carb CFM?
  267. Gil Manifold Thoughts
  268. head gasket ?
  269. Going blown have a few questions?
  270. 97 PQ 270 laser wt twin 350 mags to 383 400hp what kinda speed
  271. 350 mag rebuild to 383. oil cooler Question
  272. AN fittings and Stainless braided lines
  273. what's the best clamp on muffler/silencer
  274. Formula 242 drive height.
  275. B&M 250 vs 420 Mega Blower
  276. 2001 Sea Ray 280 SS Engine Question
  277. Low water pickup depth below bottom
  278. Have you seen this exhaust manifold before????
  279. 500HP top end in a 502 MAG
  280. Performance Boating Magazine
  281. 525EFI Valve Springs Concerns
  282. Favorite BBC Rod Thread
  283. Upgrades to Cabin Door and Hatches.
  284. Calling all mechanics
  285. Pulled one of my gimbals and the transom is in great shape! Do I still replace it?
  286. Looking to set up a back-up bullet for the chamber
  287. HP 500 Head and Cam upgrade
  288. Alternates for Bravo drives
  289. 7.4 mpi stock cam specs needed
  290. Can you keep the thermostat and circulating pump on roots type blower motors?
  291. engine adjustment front and back.
  292. Fuel system set up
  293. valve spring bearing
  294. Twin engine power steering question
  295. CMI Headers vs Stainless Marine
  296. Removing Silent Choice Exhaust ???
  297. .937 lifters?
  298. Rod bolts, main caps, and what not.
  299. Best oil filter with sandwich adapter and plugged bypass?
  300. Any suggestions on a bench buffer & polisher
  301. Borg Warner 72C transmission upgrades?
  302. Choosing Valve Covers
  303. Another Omc thread
  304. Smartcraft Alarm
  305. New Holley Ultra HP carburetor leaking fuel from throttle shafts....Ideas?
  306. Hyd. roller lifters to solid roller lifters?
  307. swapping k throttle
  308. NXT Transmission
  309. Piston to valve clearance - 454 Mag short block
  310. Fitch Fuel Catalysts
  311. Best place to order Mercury parts from
  312. Need an Anchor
  313. Corvette C-7 LT1 Engine for marine use?
  314. Silent Choice on a 525 EFI 29' Fever
  315. 731 or 741
  316. Oil pump thread
  317. De-tuning my 2001 ilmor supercat 517
  318. Missing skeg(s) and cavitation plate
  319. 502 mag torque #
  320. Is there any product that softens vinyl (interior)? What is the best cleaner?
  321. Drive couplers
  322. boat length?
  323. Blown head gasket and worn wrist pin... rebuild advise?
  324. Wellcraft scarab cv 7.4 v8 engine.
  325. Pressure checking manifold,headers
  326. Flat vs Roller, Blown 454
  327. Can you make a 502 mpi flow more air?
  328. 525 Header/Tailpipe issue
  329. 1" or 2" carb spacer
  330. Dyno proven 675-700 HP 540CI recipes?
  331. Talk to me about closed loop cooling...any reason not to?
  332. Need Help on Heads on Gen 5 454's
  333. Need Help on Heads on Gen 5 454's
  334. Upgrades to stock 350 sbc
  335. Hawk 502 specs
  336. Bearing clearances, oil weight, and more...
  337. Intake Manifold
  338. Fuel Pump and Filter mounting
  339. Hydraulic vs Electric trim tabs
  340. EFI intake
  341. GoPro Cam Choice. . . .
  342. Carb to EFI
  343. Time to rebuild the 502...
  344. Oil restrictor size hp500
  345. 1976 stinger jet boat
  346. Want more hp out if my 502?
  347. How do i get the air out of my K-280's trim tabs?
  348. Has anyone used the new merc digital trim indicators?
  349. Fountain bilge light - bulb ID
  350. How is compression ratio figured?
  351. Who's going to the PRI show next month
  352. IMCO fuel valve instructions please
  353. procharged 502 fuel system
  354. 540CI builds, MAX RPM?
  355. Bravo or Bravo x3
  356. Midrange and low RPM grunt. Discuss please.
  357. 2011 Sea Ray 240 captain seat cylinder adjustment
  358. HELP i have a gremlin onboard
  359. SB Exhaust manifolds
  360. 8' beam into 7'9" garage door
  361. Antifreeze for Winterize Mercury 700's?
  362. Cam Questions - Little Help/Direction needed
  363. single plane intake vs. dual plane
  364. Blue engine maint?
  365. Top end refresh?
  366. Enine Builders?
  367. 388 hustler that was in the classifieds
  368. Looking for some real out of the box thinking....
  369. another milkshake
  370. What size is this
  371. HP 500 valve covers....
  372. Best way to clean old fuel tanks
  373. ss rod ends?
  374. Weiand 177 or 256, which kits?
  375. Step By Step : Building An 871 Blower
  376. Baja 240 sport (24 outlaw) VS 250 (270)es
  377. Where to buy bolster tops?
  378. Fuel pump
  379. How to tell if its an HP gimble ring or not?
  380. Projected or non with blowers?
  381. Smashed Plugs on fresh re-build, any advice?
  382. Does prop slip increase or decrease with speed? Top speed less than expected.
  383. Smartcraft gauge rigging question
  384. What is this plate called and where can I get one?? SsmII
  385. Antifreeze/Magnesium question. (non boating related)
  386. 1999 vortec 454 yes or no
  387. Anyone change an Oil Thermostat in a HP500 Filter housing?
  388. Circulating Pump Size
  389. Using Marine battery in Truck?
  390. motor oils prefered on performance boats
  391. how to remove gas overflow stain side of boat?
  392. Holley fuel pump safety switch 12-810. 2 bad in one year.
  393. Engine Rebuilding
  394. header friendly sub for r44xls
  395. HELP PLEASE....Thoughts on repowering
  396. Roots Blower Sizing
  397. Engine Pre lube systems
  398. boat vapor locked after taking off fuel filter/water seperator
  399. company to handle blower DIS/REassembly and powdercoating?
  400. Gen 6 Heads on a Mk 4 Block
  401. Ebay water jacketed headers?
  402. Innovative Wideband A/F system - cable too short
  403. Revolution Marine Oil Reservoir
  404. Oil pressure safety
  405. Winter upgrades, LEDs, underwater lights, etc
  406. My quest for 60 MPH
  407. Stock power to Ilmor swap
  408. Outboard motor question
  409. Merc Racing 575 SCI running very rough/rich
  410. Kaama Question?
  411. Winterizing Question- Looking for Ideas
  412. Fuel stabablizer
  413. Fuel Filter
  414. 1988 Merc 420's
  415. Gas Ssteam Out Of Whipple Chargers
  416. Gauges Cycle/Sweep
  417. piston coatings
  418. merc twins 496HO will not exceed 2800
  419. Merlin heads
  420. Valve Springs & Rocker Arms - 525EFI's ???
  421. Exhaust Replacement ?
  422. Can we change our S/N
  423. Max safe RPM?
  424. changing throttle shifter configeration on Gaffrig
  425. What's a 502 block worth
  426. Gen 3 Cool Fuel Winterization?
  427. 496 ecm
  428. Found external leak on manifold - crack
  429. milkshake under stbd valve cover, hi water temp on the port side of the block.
  430. Looking for a Twin Disk mechanic
  431. sonic prowler 496HO PCM PROBELM??
  432. Machine shop in SouthEast Michigan
  433. Can I start the engines on the hose with the drives off?
  434. Hawk 525sc's
  435. Secondary idle screw adjustment on quick fuel 1050?
  436. Gen6 cylinder bore question max bore?
  437. 525 rebuilds with 250 hours
  438. Another bad motor
  439. Stainless marine gen 3 gaskets
  440. Power steering fluid tempature.
  441. Why do larger roots blowers use 2 carbs?
  442. Oil temp problem in my 572, need input/advice....
  443. Finally got a new tow rig! (any other 8.1 owners out there?)
  444. Need Boat Mechanic / Engine Builder in Palm Beach Area
  445. Smartcraft and gauges ?
  446. 598 build questions
  447. Profile picture
  448. Timing a custom supercharged engine
  449. gas tank
  450. Smoked 502 tonite
  451. Bbc with v6 module??
  452. Phenomenal experinece with MarineEngine.com
  453. Need engine advice N A 598 cubic inch rebuild
  454. 700 sci - over heat at high rpm only
  455. Twin Turbo Build
  456. Water Press. location
  457. Exhaust manifold differences 502 vs 525 efi
  458. Another Engine Dynoed today.
  459. WTF Did I Just Do. Considering a Formula 400 SS
  460. 33 Baja outlaw vs 32 fountain fever
  461. SBC Built, now looking for jet recommendations
  462. 502efi
  463. 525EFI Warm start problem - ??
  464. 29 fever triple digits
  465. Who makes the Black Thunder?
  466. Little help if possible
  467. Remote oil filter mounting heigth?
  468. Vibration above 4200
  469. Bravo1 drive goes down, but won't go up.
  470. What muffler / silence are these?
  471. big cubic inch chevy?s
  472. Sea Water Pump Pulley?
  473. 502 EFI, spark coming out of the coil, no spark at the spark plugs
  474. Thunderbolt IV sensors
  475. Twin engine boat porposing problem
  476. New Merc 540 replacement engine
  477. Inexpensive 454 mag performance up grades
  478. 500 efi upgrades
  479. Bennett trim tabs
  480. What problems to look for on Merc 700's
  481. Need some help with engine replacement
  482. Cam guru's please read
  483. Question On Coated Pistons
  484. big block chevy correct spark plugs
  485. Bbc valve cover question-hardin extreme
  486. Bravo upper internal plug?
  487. 502 HO Mag questions
  488. Mercury Outboard Mechanic
  489. Recurring gauge problem - 525EFI
  490. Stroker fuel injection
  491. Wet Exhaust to Dry Exhaust
  492. Windshield for a 2003 HTM 24ss???
  493. Mefi 1 to mefi 3 question
  494. The Blower Shop Intercoolers WTF!!!
  495. single SSM 6 drive height? Or who to call?
  496. Weird 525EFI Question
  497. Gimbal housing help needed
  498. 502 Merc parts ID
  499. Trim Tab Advice??
  500. merc mefi 3 question