View Full Version : General Q & A




  1. Springs pressures and valvetrain life
  2. Nothing left to check? VP 5.7GSI wont start - good fuel pressure, good ecm, wiring
  3. Formula 330 SS re-power
  4. Blowers 454 engines and compression ratio?
  5. What cleaning solution to water in oil cooler and lines?
  6. Bravo 1 props
  7. Cmi air cylinders
  8. Smartcraft/AGI Box ?
  9. Are the mercruiser M1 camshaft still available?? I need One
  10. Very high water pressure
  11. 383 mpi , buzzer , stalling help please
  12. 525 EFI intake gasket options
  13. Best product for bedding trim tabs +transom assemblies
  14. Looking for feedback on carbed HP500s
  15. Wrinkled Looking Vinyl......what's up?
  16. getting rid of the vst tank
  17. DUI Live Wires
  18. Dominator tuning
  19. Wierd tuning issue with Whipple engine - Holley ecu
  20. Bravo XR with finned top cap torque spec
  21. SSM prop pitch
  22. ARP head bolts for 525EFI part #
  23. Valve Cover Breathers: What Works?
  24. 525EFI oil pump driver/sensor position
  25. Hydraulic Steering
  26. b&m 250 mpi blower questions on a 509
  27. mk hammer marine
  28. Flushing tubular oil cooler... yes or no??
  29. Plumbing for flushing or trailer running.
  30. Exhaust Bolts
  31. Old or new partnumbers oil pump 525 EFI ?
  32. Going through electric fuel pumps. Why?
  33. Need a good Prop Shop In Portland Oregon??
  34. 8.2L Impeller Replacement
  35. Oil pump help
  36. AFR with procharged setup
  37. What size headers
  38. 2008 mirage wo6
  39. Pop up cleats
  40. 3/16 inverted flare hose fitting
  41. difference in a 496 mag base model and a 496 mag ec model
  42. Any ideas on where to get parts for Captians Choice Exhaust? 525 sc
  43. how many quarts?
  44. Broken Whipple Pulley Studs
  45. Change plugs after fogging?
  46. Bosch oil filter, thread buggered up
  47. Tranny vs bravo boats
  48. Did I just blow an engine?
  49. 217 mirage fuel gauge
  50. Intake manifold gasket question 454/330
  51. Remote Oil filter
  52. mechanical fuel pump questions on bbc
  53. Fuel injector cleaning
  54. 2 power steering pumps or just 1?
  55. Beehive Valve Springs. What if any are the downfall of these springs??
  56. intake manifold torque lbs
  57. 1987 wellcraft 26 spyder
  58. 496 Vortec Cam Swap to Crane cam?
  59. Cool fuel replacement to Aeromotive
  60. Kohler 5E - Genset Help
  61. Gasket kits question...
  62. Marine grade silicone
  63. Switch / circuit breaker help??
  64. Swim Platform Material
  65. Source for stainless "T" in 1-1/2 inch
  66. Speed Loss From Speedo Pitot?
  67. Engine builder
  68. Cmi e top header question
  69. 575 sci wont start
  70. rocker arm stud diflection
  71. Where to buy hatches
  72. 496ci 585hp tuneup
  73. Mercruiser Exhaust y-pipe 44265-C tube y pipe compatable
  74. Anyone have external full hydraulic steering on sonic prowler
  75. 600sci cam good for a 502 carbureted
  76. HP500 spark plugs
  77. Fast EZ-EFI 2.0
  78. Rub rail
  79. few questions with new build
  80. Exhaust tips and turndown options, and drive shower
  81. High Mileage Vehicle(s) - What oil?
  82. Making interior side panels
  83. Helical asymmetrical oil pump
  84. Latest Generation Mopar Hemi Engines...
  85. How to prevent your arm hairs from standing on end?
  86. Fuel tanks feed unevenly need a hopefully cheap fix
  87. Engine synchronization on hp 500's
  88. Blue 500s hourly maintenance ???
  89. Fiberglass repair in NJ
  90. Anyone ever had a couple parts sand casted or are in the casting business?
  91. Drive alignment question
  92. Can anybody tell me what cam this is?
  93. SBC circulation pump impeller failure.
  94. isky hydrualic lifters in a dart big m block
  95. Another header question
  96. mercruiser impeller vs quicksilver
  97. 502 Mpi procharger to 540
  98. Accessory drive pulley question
  99. mobile delvac
  100. oil cooler thermostat line routing
  101. 496ho oil
  102. Turndowns or DM tips on 29 Fever
  103. Maybe some input from you seasoned guys regarding motor
  104. silencers
  105. What goes here?
  106. Performance Distributors
  107. Late Model Bravo One Drive Swept Back Upper
  108. Help ID 5.7LX Mercruiser Engine
  109. FlexiDock - Dry Docking
  110. Agree or Disagree?
  111. need power sttering hose fitting size or adaptor help please......
  112. pixie dust.
  113. Dilemma with harmonic damper replacement!
  114. iPad navigation app?
  115. 525 Sea/Fuel Pump
  116. Head Gasket Replacement Cost
  117. Alega Growth Prevention - Anyone try/Heard of this idea??
  118. American Offshore vs Eliminator tall deck
  119. Midwest Engine Builder
  120. Mystery 502 Cam?
  121. Twin 525s, different fuel consumption, is this normal?
  122. Mercruiser Bell housing shaft and bearing???
  123. HP500 carb
  124. Looking for Offshore Battery Box
  125. 454 pistons
  126. Help! 30' Chris Craft catamaran planning and prop questions
  127. Bravo XR / Short Sportmaster - Splash Plate ???
  128. 454 mpi doesn't idle
  129. Single Plane or Dual Plane Intake
  130. New SCARAB 31 Excel
  131. Replacing lights with LEDs in a Gaffrig Tachometer
  132. Is there a better roller lifter than gm for .....?
  133. Analog Gauge Interface for new style digital trim limit switch
  134. Convert 1050 dominator from alcohol to gas?
  135. New SCARAB 31' EXCEL!!!!!!
  136. AEM or INNOVATE
  137. Procharger intercooler froze!
  138. anyone out there every get water in oil from exhaust sucking back??
  139. Rod color
  140. Stellings headers straight thru or with tips?
  141. information on the merc 260. boat year is 1986 hhelp please!!
  142. Belt drive Cam Retard?
  143. performance upgrades available for volvo penta 8.2 gsi
  144. 496 NA or SC?
  145. Best overall propeller for a Donzi 33 ZX running on twin 502 efi Mercruisers
  146. 33 outlaw throttle/shifter/indicator cables
  147. Fuel Pump Question 548 ci with 256 blower
  148. ignition coil regular maintence
  149. K planes
  150. MSD distrbutor?
  151. Holley 6-valve Mechanical Fuel Pump - parts?
  152. Spark Timing. How it works.
  153. Tryng to get in touch with -SPYDER26- Derek
  154. Upholstery (seat) needed
  155. How to mount gas tank? Best place to buy.
  156. Compression ratio with 250 B&M
  157. ITS transom on Sunsation
  158. Thunderbolt V Ignitition
  159. 454 efi hesitates and has been running warm
  160. flywheel for hp500
  161. Fuel/water separator, can I drill and tap?
  162. Mercury 500 efi 2002. Were to buy parts?
  163. wix oil filters
  164. Bravo Swivel Shaft replacement/parts questions
  165. Autometer water temp gauge help
  166. Kohler Generator 6.5CZ
  167. Smartcraft alarm...fault 94 pitot chk hi
  168. rust spots in exhaust ports of head
  169. Here's a head scratcher! Piston rings...
  170. B&M 250 carb options
  171. Kaama 400hp Carb GM 454 on 1991 Sonic 31ss
  172. High Volume Fuel/Water Separator
  173. Hydraulic Steering?
  174. 8.1 GXi Audible alarm and rough idle
  175. Ha ! Oil Know It All's Can't Know It All Cause Oil Chemists Don't Really Understand
  176. 6.1l crankshaft
  177. Carb opinions 540's 700 hp...
  178. 700SCI Fuel Pressure
  179. Raylar 511cid Stroker Kit for the 496?
  180. What Thought Crosses Your Mind ?
  181. Accessory brackets
  182. 92oct. VS. 90oct. non ethanol?
  183. 2004 288 Sunsation 280 Trim Tabs
  184. What to use to glue the cockpit sole down?
  185. 575 sci Idle Air Control
  186. o ring distrbutor
  187. Gafrig VS livorsi sending unit
  188. private sellers opinion on buyer wanting survey
  189. 22 razor
  190. Kiekhaefer Control Cables
  191. Engine Temperture ?
  192. Mercury Racing 600SCI with Whipple Stage II
  193. 454 fuel leakdown, add Holley red or new carb?
  194. 420hp 454 questions
  195. Ranting.... King Race Bearings
  196. Run Dry Impleller Thought's???
  197. Help Merc 700 Header Bolt Trouble
  198. hydraulic steering problem
  199. How do you remove top hinge pin ssm #6 ?
  200. engine swap alpha gen question
  201. ONCE Again trying to find some Imron paint
  202. What would cause 3 intake valves to leak on a diesel?
  203. Putting in a hp500 with harness
  204. 496 Mag HO water circulation problem
  205. 300 verados choking out
  206. Oil filter...
  207. Identifying a cam, help please
  208. Any suggestions !!!
  209. Power vs reliability
  210. HP increase
  211. Attaching LEDs to trim tabs
  212. Big Chief
  213. cylinder head question
  214. Header gaskets
  215. NEED SWIM PLATFORM FOR 88 Forumula 272
  216. 350 mag mpi no spark
  217. Assault heads
  218. Vacum Pumps for crankcase
  219. Windscreens
  220. Optimal Squish
  221. 34' Super Hawaii info? "Hawaii five Owe" in classifieds?
  222. Which blower to upgrade to?
  223. Intake Manifold Gaskets
  224. Camshaft sprocket question
  225. What's the difference between 088 and 2934 heads?
  226. HP500 oil thermostat oil bypass valve?
  227. HP500 carb thermostat aassymbly question
  228. What's wrong with AFR's exhaust port?
  229. Water / Meth. Injection
  230. Bore Notching
  231. What's you're opinion... stroke vs. bore
  232. Fountain Seats Covered
  233. 525 El fuel pump relay?
  234. merc high altitude pulley?
  235. Looking for information on an odd boat predator powerboats
  236. BBC Rocker Arms
  237. DiMarco engine.
  238. Identify these steering rams
  239. forged stock crank; mains .020 rods .030... worth buying or cut too deep?
  240. Ring end gaps
  241. Bypass and blow off valves
  242. Pro filer 375cc cnc heads
  243. 454 HP425 Chevy pistons - what would you recommend?
  244. Fuel Pump
  245. Custom full depth boat covers
  246. Bad Transom
  247. Hp drive couplers questions
  248. marine jobs?
  249. No Wood?
  250. Livorsi guages
  251. 525 sc fuel pump
  252. marine sealant (clear)
  253. 700's whipple #3 upgrade specs ?
  254. Fuel Pressure Boost Combo Gauges
  255. Odds and ends for a Gen IV refresh
  256. Garage door issue...
  257. Procharger intercooler corrosion
  258. Oil thermostats
  259. cheap header
  260. 454 first build. Suggestions
  261. Merctrans question
  262. Y pipe on blower motors
  263. Aftermarket heads do they fit all generation bbc
  264. B&M 250 refresh
  265. What is the right carb
  266. Aluminum Engine Hatch Hinges
  267. Engine Cradles For LS Motors and 426 Hemi
  268. flywheel, from bravo to a transmision
  269. cooling water questions
  270. 350 mag mpi, WOT rpm?
  271. To shim or not to shim valve springs
  272. Seebold swim platform?
  273. Formula 242 rpms and props and such
  274. Bearings - Coated or Not?
  275. Thunderbolt or MSD
  276. Bravo flywheel housing 8 plate oil cooler mounting
  277. Cam Identification Question
  278. hp 500 horse power
  279. Crossover and Thermostat housing for use with Procharger
  280. How much does weight matter?
  281. Anodes for trim & steering rams - Bravo XR / ITS ??
  282. Cmi 496HO header mods
  283. Anybody use the fast ez efi? Or other brand??
  284. Chrome Plating
  285. Carb Selection
  286. Leakdown test procedure info needed
  287. Best Viewing place on shore to watch Boat Races at Key west.
  288. Question for Sonic owners
  289. LS Engine Plumbing
  290. 383 vs BBC in a Baja 220
  291. engine compartment temps
  292. interested in 2014 scarab 30 tournament cc - are they any good?
  293. Merc SC800 supercharger pulley/boost ratio?
  294. Ls..... Engine tear down intervals?
  295. engine dimensions
  296. Outboard motor life and issues
  297. A/C power needs
  298. Fresh (10-20 hrs.) 600 cubic inch motor hours warped all intake valves last season?
  299. speaking of HP estimates, anybody ever dyno stock 330-365-420 and what do they make?
  300. Windshield Replacement
  301. 454 build using peanut ports
  302. horsepower estimate
  303. 300 Verados with 400 hours - any major concerns
  304. A/F Ratio
  305. Merlin Intake on a 454
  306. Templet for 280 K planes
  307. Prop's on a 1990 36 no step 420 power
  308. standard deck to a tall deck
  309. 700 - 750 Hp: Boosted LS vs NA Big Block?
  310. Scarab 29' hull/speed limits?
  311. oil restrictors and pushrod restrictors?
  312. air fuel ratio with boost
  313. Most power out of a 454? PROVEN combos????
  314. Repowering 33 Outlaw with twin 454s: MPI or Carbs?
  315. 700 sci whipple upgrades
  316. Differences between K plane 280 vs 300
  317. Backwards sea pump
  318. 049 oval port heads
  319. Symptom of leaky header
  320. Neutral balance Harmonic balancers? middle of the line?
  321. 502 MAG MPI Cam swap
  322. Still Looking!
  323. Running a boat on the hose in freezing temps?
  324. superchillers
  325. ignition coils
  326. Mercruiser HP425 Gen V Big Block pistons
  327. Did GM sell a 509 block from factory
  328. The trouble with Blowers is:
  329. Stainless exhaust tip flappers ???
  330. What cams will work with stock lifters.
  331. Knock sensors for 502 mag mpi
  332. Another build dyno'd today. Whippled 509.
  333. Compression Ratio
  334. Anyone Been To The Louisville KY Boat Show??
  335. Installing new Camshaft
  336. Nordskog GPS speedometer wiring..
  337. Facebook tech.
  338. 1994 mercury racing hp 465?
  339. 454 cam
  340. The GM/Merc Rectangle port head. Discuss.
  341. morel hyd roller lifters
  342. Pushrods
  343. Who has 575sci TB?? any motor shops??
  344. Big cube n/a combo's
  345. What head should I use
  346. Leaking Trim/Trim Tab Pumps
  347. Engine Guys help (scan tool to use) on 97 454mag mpi's
  348. Diacom software ?? - where to hook up on 525EFI ?
  349. 502's with roller cams have some saltwater spots on them, Replace or run?
  350. 454/502 Mag Camshaft GM # 12551622
  351. 540 Clearances and oil pressure thread...
  352. Identify this raw water pump?
  353. cnc d heads
  354. Piston Mercruiser 496 HO
  355. Machining Fuel Rails
  356. 454 Gen 6 Engine Cam Question
  357. 600SC mechanical fuel pump ability??
  358. Looking to instal a 496 Mag HO where there was a 7.4 MPI
  359. Procharged 502 Mag Oil Cooler Recommendations
  360. Bravo One outdrive
  361. 700hp 540s
  362. 454 rebuild with blower... Pistons and clearances.
  363. Help! - what happened to champion cylinder head co, palm coast, fl?
  364. good rockers for 6000 rpm, 540CI combo??
  365. 525 whipple charged engine weight
  366. Flywheel balancing
  367. Broken xr case repair?
  368. B&M blower identification
  369. noise under valve cover
  370. Need FlyWheels...Internally Balanced
  371. Anyone running Imco powerflow manifolds on ZZ502
  372. TRS Values
  373. any proffestional tile setters looking for work
  374. Prop slip increase with speed.
  375. Oil Pan Swap / Value
  376. Carb vs Fuel Inj?
  377. CMI headers leaking....HELP
  378. anybody with 496 HO using stainless marine exhaust?
  379. Elbow restrictor gasket vs full flow gasket
  380. Would you guys use this?
  381. velvit drive pump
  382. Rubberized spray flooring?
  383. Couple quick questions - piston install
  384. Tuners or Chips?
  385. How many RPM's can the stock 500HP rotating assembly take?
  386. Who is not running 45* valve angle?
  387. In-Control Shifter
  388. Crank to crank measurement / drive centers
  389. Bumpers and ropes???
  390. What oil pan is this???? Gen6 bbc
  391. 87 scarab excel 26 convert to bravo is it worth it?
  392. powerquest 270 laser cockpit
  393. Article about valve angles
  394. New boat soon, 32' BT, 29' Scarab, 31' Scarab, or another Formula??
  395. Piston top displacement stats needed
  396. worth the trouble?? 47 fountain
  397. New carpet for a Cigarette 20
  398. Water preassure in Bravo XR?
  399. Storage of gasoline
  400. conversion i/o to o/b help.... pics... info... anything
  401. Couple quick questions
  402. Grilling go fast
  403. Good mechanic
  404. lightning headers in a 25 Daytona?
  405. Mechanic needed pompano beach area
  406. 502 mag mpi not priming oil??
  407. Turndowns and water reversion?
  408. Fuel Stabilizer or Octane Booster?
  409. Found a 525 short block! What's it worth?
  410. +.300 lifters
  411. Baja 33 Outlaw Parts
  412. Search Tempest - Trojen virus??
  413. The million dollar question
  414. msd
  415. determining oil
  416. EFI 525 rear mounted camshaft sensor???
  417. Merc 700sci hrs/lifespan before rebuild
  418. Roots supercharger intake question
  419. Trouble free 525efi - do they exist?
  420. Different size headers
  421. Blower Application - Fuel Pressure Reg. & Return Valve
  422. 502 Ring Recommendation Please
  423. Good Bad opinion Formula 292 or 312
  424. original motors in a 91 sutphen
  425. Leaking Hatch Rams
  426. Mesa Balancing
  427. HTM oil pressure gauge
  428. Regular or Swept back
  429. Budget 454 Build
  430. 420hp 454
  431. benefits of distributor-less ignition
  432. 454 Repower
  433. 500 efi
  434. Dropping some weight on a HP500 carb?
  435. Any one interested in a boat move New Orleans to Detroit Area
  436. Best Cam Choice - Non-roller 350 with Vortec heads
  437. Steering Wheel rotary circuit switch?
  438. Carb talk
  439. Carb CFM?
  440. Gil Manifold Thoughts
  441. head gasket ?
  442. Going blown have a few questions?
  443. 97 PQ 270 laser wt twin 350 mags to 383 400hp what kinda speed
  444. 350 mag rebuild to 383. oil cooler Question
  445. AN fittings and Stainless braided lines
  446. what's the best clamp on muffler/silencer
  447. Formula 242 drive height.
  448. B&M 250 vs 420 Mega Blower
  449. 2001 Sea Ray 280 SS Engine Question
  450. Low water pickup depth below bottom
  451. Have you seen this exhaust manifold before????
  452. 500HP top end in a 502 MAG
  453. Performance Boating Magazine
  454. 525EFI Valve Springs Concerns
  455. Favorite BBC Rod Thread
  456. Upgrades to Cabin Door and Hatches.
  457. Calling all mechanics
  458. Pulled one of my gimbals and the transom is in great shape! Do I still replace it?
  459. Looking to set up a back-up bullet for the chamber
  460. HP 500 Head and Cam upgrade
  461. Alternates for Bravo drives
  462. 7.4 mpi stock cam specs needed
  463. Can you keep the thermostat and circulating pump on roots type blower motors?
  464. engine adjustment front and back.
  465. Fuel system set up
  466. valve spring bearing
  467. Twin engine power steering question
  468. CMI Headers vs Stainless Marine
  469. Removing Silent Choice Exhaust ???
  470. .937 lifters?
  471. Rod bolts, main caps, and what not.
  472. Best oil filter with sandwich adapter and plugged bypass?
  473. Any suggestions on a bench buffer & polisher
  474. Borg Warner 72C transmission upgrades?
  475. Choosing Valve Covers
  476. Another Omc thread
  477. Smartcraft Alarm
  478. New Holley Ultra HP carburetor leaking fuel from throttle shafts....Ideas?
  479. Hyd. roller lifters to solid roller lifters?
  480. swapping k throttle
  481. NXT Transmission
  482. Piston to valve clearance - 454 Mag short block
  483. Fitch Fuel Catalysts
  484. Best place to order Mercury parts from
  485. Need an Anchor
  486. Corvette C-7 LT1 Engine for marine use?
  487. Silent Choice on a 525 EFI 29' Fever
  488. 731 or 741
  489. Oil pump thread
  490. De-tuning my 2001 ilmor supercat 517
  491. Missing skeg(s) and cavitation plate
  492. 502 mag torque #
  493. Is there any product that softens vinyl (interior)? What is the best cleaner?
  494. Drive couplers
  495. boat length?
  496. Blown head gasket and worn wrist pin... rebuild advise?
  497. Wellcraft scarab cv 7.4 v8 engine.
  498. Pressure checking manifold,headers
  499. Flat vs Roller, Blown 454
  500. Can you make a 502 mpi flow more air?