View Full Version : General Q & A




  1. carrera cat prop size
  2. 502 Mag MPI HP and TQ Curve
  3. Powersteering Pump Reservoir
  4. Blower Clearance
  5. buying a new oil pump!
  6. Mercruiser 425 gaskets Help!!
  7. Gen VI Mag piston rings?
  8. Breather for oil fill tube....
  9. Removing pully from sea water pump?
  10. Got CMI's?
  11. Need Exhaust Manifolds 350 Mercruiser
  12. oil filter
  13. 525 Bouncing Tach?
  14. starter on hybrid engine combo
  15. Wideband O2 target WOT
  16. alternator/ps hitting cmi headers, what can i do???
  17. Low Oil Pressure on Rebuilt 454
  18. 4 cylinders on one bank fowling out
  19. Raylar "CoolGap" intake manifold
  20. Distributor Cap ?
  21. 454 Merc and a Rough weekend running Offshore
  22. OMC 5.0L exhaust
  23. 572 intake and carb options??
  24. Help Please. 5.7 Alpha One 1990 model Mercruser wiring problem
  25. 500 EFI powersteering pump
  26. Engine Dyno/Tune in Midwest
  27. Stainless Marine 502 MPI risers work on 500 EFIs?
  28. Problems with my #3 Speedmaster
  29. water pressure guage questions
  30. Violent sound and vibration from drive/motor and leak!
  31. Can we post pics on here?
  32. 572 stroker What to do with EFI
  33. Mufflers
  34. fuel pump pressure
  35. mercruiser 10 pin plug extension
  36. 6.2 MX knocking
  37. Valve guide wear
  38. 525efi's WON'T START
  39. Mercruiser Thunderbolt Ignition Question??
  40. Strange fluctuations with trim gauge
  41. Switch problems, please help!
  42. AMC 401 in a boat
  43. fuel pressure issues - pulling my hair out!!
  44. Engine alarm constantly on help 500efi
  45. need xome help - large leak from power steering ram
  46. 496 raw water pump?
  47. would Ls6 heads be good
  48. 5.7 Mercruiser 2005
  49. Electric fuel pump return
  50. fuel pump not getting power on '97 454 MPI
  51. Hard to shift back into nuetral under load.
  52. bravo1 trim not going down
  53. Spark Plug Changes?
  54. Freeze plugged popped!
  55. wheres the neutral safety switch on a bravo setup??
  56. holley fuel lines leaking....
  57. Outboard issue
  58. bleeding hydraulic steering system
  59. bleeding hydraulic steering system
  60. engine hatch on 24 outlaw
  61. manifolds???
  62. What are they worth?
  63. Some Oil Info from the people themselves!
  64. Upgrading to a gen VI 454 what can i use from my IV
  65. Fuel Pressure Required for 454 carbs? my pumps bad?
  66. any SEADOO 951 mechanics ????
  67. Throttles not even
  68. When to tune up
  69. Where to buy 5.7 Longblock?
  70. Soft Wall Exhaust Hose...any experience?
  71. what are drop box asd-8's worth??
  72. throttle stud for holley carb????
  73. 89 454 rebuild
  74. Sea pump HELP..
  75. 525EFI Kill Switch Wiring?
  76. Trim gauge stuck full up
  77. Best prices on smartgraft gauges and acces
  78. Kiekhaefer Controls
  79. cam recommendations for 509 bbc
  80. A Lot Of Questions!! 508 & B&M 250???
  81. Roccard Marine
  82. Engine getting hot...??
  83. intake manifold
  84. fuel pump Wipple
  85. what w.o.t rpm for 1987 mercruiser 350
  86. Anybody converted 5" tails for use on sport tubes???
  87. cobra drive gaskit question
  88. internal or external ballanceing of a HP500???
  89. 496 problem
  90. Alpha 1....keep or move up to bravo 1???
  91. Drive lowers interchangeable??
  92. Weiand Team G Intake????
  93. Excessive fuel usage?
  94. 502EFI Won't rev past 3500 RPM
  95. Max WOT on a 496HO
  96. 496 Mag Warning Horn
  97. Engine mounted off center. Pros,cons
  98. Can this happen again?
  99. cherry neutral safety switch
  100. Boat Life bunks, carpet or Felt??
  101. Which fuel pump?
  102. boat seems " not level starboard to portside"
  103. Lots of water in oil... stumped!!
  104. imco powerflow hitting power steering pump hoses....
  105. HP 500 fuel/water pump
  106. Warlock 25 SXT prop blowout
  107. Mercury Outboard Trim/Tilt
  108. Which oil thermostat?
  109. carb jetting
  110. Whippled 500 EFI Injector help!
  111. What size are nuts for Gaffrig gauge's?
  112. Carb Wizard needed...?
  113. oil temp, steaming oil...:-(
  114. Broken Valve
  115. What are these?
  116. Starting problems...
  117. 502 pistons
  118. 502 cracked block repair?
  119. Prop Washers
  120. Need Help ASAP...!!!
  121. stock 500 efi push rod lengths question
  122. Bravo Outdrive Oil Cooler
  123. New light mast / flag pole?? need a new one
  124. conditions that will trigger a CONSTANT alarm?? someone please help me???
  125. Trouble getting alpha lower in the upper unit
  126. Powermaster Ultra Torque Starters
  127. CMI Headers and drip
  128. LS V8 outboard
  129. Valve cover caps milky after 30 min on hose - condensation or something else?
  130. Amsoil Z rod
  131. Finally had time to go pick up my boat
  132. Had boat fixed, want to verify
  133. gauge bulbs
  134. BBC oil filter mounting
  135. Opinions wanted....MPI or Carbs
  136. cmi/merc
  137. over heating! HELP please!!
  138. Replacing External Steering Hose
  139. 140 or 160 thermostat
  140. Melted rubber exhaust hose replace with stainless?
  141. Anyone on merc-net now?
  142. starter fuse link
  143. 500efi oil cooler removal
  144. starter bottom mount CBB
  145. serial numbers ?
  146. What do you guys use on holes below the waterline?
  147. 3.4 merc outboard
  148. xr / xz
  149. thunder bolt modules
  150. Prop size mirages
  151. engine / coupler alignment issues..
  152. Opinions needed on rebuilt engine backfiring
  153. Mark Iv Bowtie Blocks
  154. moisture meters
  155. Refigerator Question
  156. speed of a 26' checkmate
  157. formula silent thunder exhaust tips
  158. 496 make loud tone when you trun key
  159. vinyl repair?
  160. 502efi VST Line routing/ locations?
  161. Raw water pumps
  162. Raw water pumps
  163. gas fill cap
  164. Gps Speedo
  165. Probably a simple question
  166. Computer HDD Data Retrieval
  167. remote on back of boat for radio
  168. What heads should i use on a 540cui
  169. estimated speed for baja h2x
  170. 7.4 MPI fuel system
  171. 496 ho water pressure tube ???
  172. Port gauges read low
  173. HOW much HP 604CI?
  174. 700 SCI fuel pump rebuild?
  175. imco valve covers clear T&D rockers
  176. block casting #'s
  177. 500 efi getting hot?
  178. Trying to find an oil filter adaptor
  179. machine marine steering upgrade
  180. Help! Smoke on the Water!
  181. Retractable ski pylon?
  182. 502 mag help
  183. Would you own a boat if it was cool and cloudy the majority of the summer?
  184. timing and jetting.... i need small adjustments
  185. Let's talk ignition systems
  186. 8.1 496HO cam swapping, factory cam gear-1 pink dot, crank gear-pink dot and divit?
  187. Houston we have a problem!
  188. Corrugated Marine Wet Exhaust Hose...??
  189. Garmin GPS TO GPS LIVORSI SPEEDO
  190. Aviation Gas 100/130 or Racing Fuel... Really?
  191. 548 running very rich.. Flame arrestor??
  192. oil temp sender location...
  193. Guys need some supercharger advice ! and boat information
  194. NGK R 5671A-9 plugs
  195. Coolant temp sensor
  196. Adapter for 1" hex to tapered 3/4" steering post?
  197. 454 Marine Power Question
  198. 502 MPI hard to start/won't idle
  199. gen VI cylinder head gasket
  200. Trim pump hose fittings
  201. 500 efi short block questions
  202. Ignition Help
  203. Base timing
  204. Max RPMs for OME PowerSteering and ALT
  205. 2009 700SCI low oil pressure warning
  206. water coming in WTF!!
  207. fuel psi on blown carb motor
  208. Engine temp spike
  209. fuel pump question
  210. Algae in fuel tank
  211. Bad plug wire
  212. problems planing
  213. 496 HO Power Steering Problems
  214. synthetic oil in 500EFI?
  215. No Ignition Mercruiser 350 Mpi
  216. 502 efi/mpi breaking up/ cuts out.
  217. HP500 dyno chart ?
  218. running a flexplate instead of a flywheel
  219. reflash a mefi 3
  220. Teleflex Extreme cable; long length needed
  221. Trim indicator cables -
  222. Am I over carbed??
  223. scarab 22 switch alpha to bravo any tips or thoughts
  224. Plexaglass canopy
  225. Looking for Colored Screws
  226. fuel system needs for 470-500hp setups
  227. oil
  228. Headers-use less water to make louder?
  229. Problem with starter grinding
  230. How do I find out who has the loan on a boat I purchased
  231. do a plug check?
  232. Stud Girdles
  233. Overheat issue…maybe
  234. How do i remove imco gimbal ring
  235. 496 Mag w/Whipple Stage II Stock Thermostat Safe??
  236. Power Trim Hoses
  237. Loose Steering
  238. Tulipped valves
  239. Trim tab starting height?
  240. Oil Temps
  241. So how do you think this 496 will run?
  242. Mag To Ho
  243. Has anyone tried these starters
  244. 2001 454 mpi timing
  245. Can a backfire damage a new starter?
  246. Adding anodes to K Planes.
  247. Corsa exhaust question
  248. cutting out
  249. Crankcase Pressure
  250. Add-on vs. full hydraulic steering
  251. scx/sc water pickup question
  252. Baby Steps, 1st Timer: 1990 Regal Velocity 230
  253. HP500 spark plugs
  254. Tight wrist pins
  255. How much HP will MercTrans take?
  256. Drive help and opinions PLEASE!!
  257. Prop ?
  258. Water leak
  259. Changing TBI to MPI
  260. What's my CFM
  261. RMbuilder phone number
  262. 420 Mega blower
  263. gil manifolds reversion?
  264. no trim under power
  265. boat has a leaning to the left issue and break in info???
  266. Mirage plus 25P
  267. 88 baja force 235 speed question
  268. Any help at all please!
  269. Outboard Help
  270. 700sci's starting hard
  271. 500 efi long blocks
  272. 496HO over heating
  273. Speed specs
  274. 525sc upgrades?
  275. Help!!!
  276. Plumbing question
  277. powder coating???
  278. snapped alpha one pinch bolt
  279. need hatch actuator
  280. TPS AND IAC cross reference
  281. 330hp 454 dies at idle.
  282. powerquest emblem
  283. Looking at 94 29 foot scarab just want some input
  284. Which is better?
  285. Uh oh. 106db. How to get to 86? Or at least 90?
  286. Windshield Trim
  287. 24' obsession torent
  288. Gotta vent ... literally
  289. 454/502 harmonic balancer
  290. Mechanical indicator on the drive...
  291. Fuel Pump & Oil adapter
  292. water pump/blown engines???
  293. Smaller family boat?
  294. Head studs hitting IMCO manifolds
  295. McLeod Booster Failure
  296. 500EFI Whipple idle problems
  297. Livorsi ll gauges
  298. 454 Mag MPI HP rating?
  299. MEFI 1 Tuning
  300. No spark from coil - low voltage across leads
  301. depth finder install
  302. Weird temp/gauge issue going on
  303. what intake you guys running on big blocks
  304. boat carpet
  305. 454 EFI VST Fuel Pump anybody?
  306. Keeps Throwing belt...
  307. Does 502 have rectangle-port heads ?
  308. Driving me nuts (condensation?)
  309. Ilmor questions...
  310. Wiring for tab pumps
  311. Trim control switch options??
  312. 454 chev build
  313. Scan Tool???
  314. Where is Dave_N???
  315. 500 efi erratic idle
  316. engine lacking power
  317. lighting headers good or bad?
  318. One side of 496 leaner than the other-
  319. K planes and trim cylinders.
  320. Engine oil pressure issue... opinions ?????
  321. Whats the correct timing and spark plugs
  322. 1 Drive stuck up
  323. Water in my TRS trans
  324. 525EFI Have Knock Sensor?
  325. Help ID'ing 6.2 MPI
  326. Cool lookin PFD's
  327. Weird stain on Vinyl HELP?
  328. new/rebuilt engine -new oilcooler=water oil mix
  329. 30amp to 50amp adapter marine vs rv
  330. steering problems
  331. Latham Steering
  332. Hatch actuator not working!!!! HELP!!!!!
  333. wiring diagram with sensor for 01' 496ho
  334. Engine starving for fuel?
  335. Gas Guage Doesn't work
  336. Trim Sender / Gauge All over the place
  337. Spark Plugs: What is everyone using?
  338. Need a marine surveyor in Palmdale CA
  339. Machine Shop recommendations in S.D.
  340. 525 EFI slow response??
  341. 496ho Lean burn
  342. very small water leak can i
  343. new 496 head gasket issues
  344. Unknown cam specs
  345. Tach does not look right??
  346. 454 Mag EFI Cyl Head
  347. SBC getting hot at high rpm
  348. 300x vs 300xs comparison
  349. hp500 ideling high
  350. Drive / coupler alignment issue is kicking my ass!
  351. 700sci loading Up
  352. old 502 EFI MPI Tuning Kit
  353. Tachometer calibration
  354. 496 Mag Black Soot on Transom Lots of it
  355. Help Diagnose 525 EFI Stutter
  356. Stagger stringer setup?
  357. new 502 engine.
  358. Orange Fluid on Blower Manifold
  359. Blue Hp 500 vaccum line question
  360. Temp sender???
  361. Garboard drain repair
  362. Cyclone Replacements
  363. Trying to standardize fluids between multiple boats (Volvo & Merc)
  364. thunder bolt IV timing questions
  365. 502 not pumping water out exhaust even with ears on drive
  366. Air fuel ratio...wet exhaust???
  367. Swapping steering
  368. Loss of Power at WOT
  369. 540 build help
  370. RPM differential
  371. What pitch should I use?
  372. Muffler adapter
  373. 1998 454 magnum flywheel problem????
  374. Raylar Kit Install for 496 HO
  375. 211 libb speed
  376. Is there an easy way to check Octane Level
  377. fuel ?
  378. fuel ?
  379. Mercury 525 EFI Water Pressure?
  380. 496ho alarm (i have scanner)
  381. Hot Engine Oil
  382. I think I finally pulled the trigger!!!!
  383. bad performance Wellcraft 233
  384. Throttle cables
  385. Knocking noise possibly in driveline.
  386. #1 cylinder problems
  387. Where to draw power for electric choke and fuel pump?
  388. Do you have to have the PCV in the intake HP500?
  389. Any Corsa 4 wire Solenoids for sale ??
  390. new holley carb plumbing
  391. Help Sync'ing Engines/Throttles at Cruise
  392. 557 vs big cubic inches
  393. MAP Pressure??
  394. 454 mpi idle vacuum
  395. Mercruiser 500 Hp Bulldog
  396. waste holding tank
  397. Muffler Question
  398. Hp 500 Fuel Injector wiring
  399. 7.4 mpi with 454 mag cam question
  400. Center console advice concept, glasstream, etc
  401. Crossover bypass routing?
  402. overheating then hydro-locking engine
  403. 496 HO Plug Choice - Confirm please
  404. Engine temp question
  405. 525 hesitation?
  406. Trailer Brake Issue
  407. best high speed bimini ?
  408. changing throttle cable throw 31 sonic
  409. Anyone using Cheap Ebay HEI distrubutors
  410. water temp all over the place
  411. Switching to a electric fuel pump..got question..
  412. Heat exchangers
  413. Scat 9000 Steel Cast Crank
  414. power steering help...
  415. fuel gauge
  416. Tachs Erractic
  417. K-Plane help
  418. Just installed a 496HO in an Formula 242LS, and the tach does not work?
  419. Amp
  420. New 540 with crossover hotter on starbord side
  421. 700hp scarab
  422. motor will only rev to 2300 RPM under load
  423. Dana Marine 4" s/s exhaust tips
  424. 496 mag ho rpm
  425. power loss--Hard starting after sitting for a hour
  426. 1987 formula 242ss speed problem.
  427. 525 Issues?
  428. Trim Tab Problems
  429. ? reprogramming old MEFI 1 and 2 ??
  430. Riser to ex tip mismatch - how far can hose flex?
  431. 496 raw water pump problems
  432. 454 loss of RPM
  433. water temp / oil temp??
  434. XRP fittings source
  435. coupler questions.
  436. Ignition Issues
  437. Need Help, old 502 EFI only 4950 RPM, rev Limit ?
  438. Powerboat shows on TV
  439. HELP. Backwashing 496 after impeller replacement.
  440. Jetting advice needed for 489 with Holley 800
  441. Need help with my gas hog(boat)
  442. CRT cordless rotary trim.
  443. 2000 Fountain twin 502's which prop goes where...stupid??
  444. New Tach Going Crazy
  445. oil pressure sender
  446. super charger
  447. Oil pressure problem need some advice
  448. motor stumbles and stalls out
  449. Hatch actuator
  450. Lightning Headers Vs Gil Dry Exhaust
  451. Question about a dipstick
  452. Brovo 1 - Reverse Problems
  453. MEFI-1 or MEFI-2 Cost?
  454. Carb HP500 Oil Overheating?
  455. How do I drive/fly my new Tunnel? 22' DCB (Daytona) with a 500 HP i/o
  456. Bravo 3 - no forward gear, gets stuck in reverse.
  457. Converting from MercTrans to BW c72
  458. Tighten to yield bolts - Re-use
  459. Everything completely dead... HELP!!!!
  460. Loose Flywheel Bolts???
  461. thermostat hole
  462. Oil cooler repair?
  463. Help, trying to convert from crossovers to thermostats
  464. NJ engine builders
  465. Gen VI 454 mag base timing.
  466. removing painted stripes/logo's safely
  467. stainless marine and takin a big gulp of water
  468. Cover, Sunbrella or Hot Shot or ??
  469. fuel level?
  470. engine alignment with offshore mounts
  471. Flywheel Issues
  472. Having trouble with circ pump hose with RPM AirGap
  473. Prop,s
  474. CMI Header Temp.
  475. Keith Eikert Oil Pans & a starter that fits it? anyone have Experience?
  476. amp question
  477. new outdrive?
  478. DUI Ignition
  479. Intercooler plumbing question
  480. Trouble with electric hatch actuators
  481. 496 just makes a click?
  482. One side running hot
  483. outboard guys steering question
  484. New Altenator
  485. Star Marine Depot
  486. Proper place to show my boat
  487. TQ on a mercruiser 425 hp?
  488. Subwoofer question
  489. Anyone have the ability to convert oil filter part numbers?
  490. Prop Puller - Stuck Volvo DP front prop
  491. buying a winterized boat
  492. bellows install question
  493. 288 Sunsation.
  494. Viking Boat Lifts
  495. Innovate LM-2 integration questions....
  496. Engine hard to start when cold
  497. question about sea pump?
  498. 350 Mag MPI High Oil Pressure
  499. SS Raw Water Pump
  500. Gil manifold riser gasket