View Full Version : General Q & A




  1. Small block EFI build
  2. Tube pulling duty - best to prop down?
  3. Daytona Sensors question
  4. Which is better Sarasota or marathon races?
  5. 632 CI 815 hp.... 12,000.00?? come on....
  6. Intense marine
  7. Exhaust Question
  8. 6.2 rebuild
  9. Imploded Scarab 29 - Lake Conroe Texas
  10. 377 oil pump
  11. IMCO -3 shorty - water pick up slot
  12. Pilot Buhing
  13. Stalling 502 mag mpi
  14. Why no intank fuel pumps?
  15. Just Confirming - Cometic Head Gasket Reusable??
  16. looking for a 502 crankshaft
  17. 07 38 Top Gun new power, need props?
  18. Help finding Part # for rear main seal SLEEVE for GEN 6 502
  19. Power steering quits working at high trim?
  20. 1979 thunder craft shift problem
  21. Mercury trim pump wiring (diagram), is this right?
  22. Mercruiser 5.7 engine swap, flywheel/coupler question.
  23. Turbos and centrifugals
  24. 7.4 L mercruiser 4 barrel won't kick in
  25. Trim tabs indicator cable lengths..
  26. hi perf merc efi; ever used in a motor vehicle? OEM?
  27. Q-Jet to Hollry Carb Swap Question.
  28. Are fuel pump pushrods supposed to rotate?
  29. Merc theromostat housing gasket ?
  30. mercrury 1075's oil pressure
  31. Huber 925 info request??
  32. 1075sci
  33. Marine Fuel in Southern Michigan - Jones Michigan
  34. For sale
  35. breaking up after 75 % throttle
  36. Exhaust Bolt holes blind?
  37. Installing external hydraulic steering questions
  38. Anyone on here have a 30' cobra terminator cat
  39. Morel vs Johnson lifters. Info needed
  40. 454 has major stumble/flat spot at 3/4 throttle but runs great at WOT - diagnosis?
  41. Operating Temps n/a 540's
  42. Who make the hatch actuator for Advantage in 06
  43. Engine break in oil change
  44. Help with Flywheel or Ring Gear decision
  45. HELP! New 8.2L with CATs has sand in air valves?
  46. 5.0MPI motor pull and oil pan
  47. A/f 540ci n/a
  48. Fuel pressure @ wot
  49. Afr meters
  50. Holley/Edelbrock/Clay Smith 6-valve rebuild kits still available?
  51. Engine Stumbles with Tach Jumping......
  52. Yay ... Fun with wires
  53. Which torque wrench do you use?
  54. Sputtering at WOT
  55. Stupid question: What's the stock Mercruiser 7.4L throttle cable bracket look like?
  56. Depth Sounder and GPS
  57. Help with 502 Mag
  58. Anodized cleaner for painted aluminum
  59. Help with a newly rebuilt HP 500
  60. Engine torque specs 575sci
  61. 525 EFI Oil Pump Drive Sensor
  62. Quick Rinda mercruiser question 555 adaptor
  63. wiring diagram
  64. slight miss when i hit the Trim ?
  65. 2004 496. Differences ?
  66. Fresh Water Flush Kit - operation
  67. Mercruiser 5.0 EFI - Not firing.
  68. Alpha drive tear down and install problem
  69. Power In Power Out
  70. Depth sounder problems
  71. Raw water pump issue 496HO
  72. Dry - To - Tip Thru Transom Exhaust Help
  73. Safe RPM for Merc 420hp
  74. Using my 454 mpi intake on a bored 502
  75. Merc 496 HO / Bravo 1 steering issues
  76. E-Z Tow Trailers.
  77. feedback
  78. Merc Fuel filter, part numbers
  79. Remote start and alarms for boats
  80. Rev limit problem 8,1 inboard Mercruiser (496 Mag)
  81. 496 ho iac not responding
  82. Yamaha base timing mode???
  83. External flap
  84. Bravo One Tie Bar issue
  85. 97 Baja Boss Hammer
  86. Throttle Adjustment - how difficult
  87. What all is different between the 502MPI's "97" and "98" ???????????
  88. Question on new A/C units Dometic vs Webasco vs Mermaid
  89. Emi exhaust still reverting
  90. 7.4 motor runs then it don't
  91. bravo 1 to Bravo xr price difference
  92. How to tell the difference ?
  93. Bravo dual water pick ups
  94. CMI header overheating
  95. Best Spark Plug To Use
  96. Mercruiser 5.7 EFI - knock or ping under heavy load
  97. 575sci what hyd rollercam to use
  98. Do I need water pressure gauges?
  99. well its official fourhoaresman did my tranny in
  100. Hesitation / Bog under acceleration
  101. 454 MAG vs 502 Mag fuel curves
  102. Thunderbolt IV question/ issue
  103. Water Pressure Gauges
  104. 6.2 mpi intermittent stall
  105. k&n oil filter on billet aluminum mount.Almost impossible to get off. Anyone else.
  106. Extension box - external steering
  107. 500 Bulldogs
  108. only one company that makes headers ??
  109. Looking for a good 350 Vortec setup.
  110. quickfuel carbs
  111. shift cable adjustment tool/ plate for a OMC Cobra (1986) drawing or CAD file?
  112. Triple 500 HPs to twin 575 SCIs
  113. Question about B1 transom assemblies
  114. What cam button???
  115. Exhaust port deposits
  116. Walmart oil prices.....
  117. mpi running rich at idle
  118. Freeze plus Chevy
  119. 500efi intake gasket
  120. What Temp Sender is This?
  121. Older 110s kplane
  122. Mercury 1100 Valve Lash
  123. T-stat housing plunbing
  124. 489 Temp weird temp issue
  125. What Engine Oil for Superchaged Engine?
  126. Installing thru hull tips
  127. Questions about big power
  128. 548 or 572 BBC N/A Build Assitance/Advise
  129. Alternative to Rubber Exhaust Flappers??
  130. Deutsch or Weatherpack or Metripack?
  131. Water pressure too high?
  132. Sierra vs. Mercury / Quicksilver
  133. Gen V marine 502
  134. catamaran planning issues. 30' Chris craft
  135. Replacement 5.7 350 engine
  136. Holley EFI/DIS Conversion
  137. 2003 fountain 29 cabin door gas assist cylinder for top flip up door
  138. 500efi head gasket
  139. 496 ho drive coupler question
  140. Speedo hook up?
  141. Tachs not getting signal from smartcraft
  142. Engine swap question
  143. 454 blower update.
  144. Help - Merc 454 can only get to 3900 rpm wot
  145. weird distributor problems...
  146. 454 Mag MPI: Strange cold idle.almost sounds like a 330hp for a few minutes
  147. Wiring question on an engine swap
  148. Thermostat Questions - Notched Gasket?
  149. HaxbySpeed
  150. after market exhaust 350 mag mpi
  151. Need Someone Smarter Than Me
  152. Thru hull exhaust question
  153. What's the purpose of the shift bracket?
  154. 496 Position Sensors (Cam & Crank) Question
  155. oil pan related question
  156. installing transom assembly
  157. Questions on Engine Modification xm270hr cam
  158. B/W Tranny dipstick plug help
  159. well do i have the start of a trans prob
  160. Dry sump tanks
  161. What type are these switchable exhaust tips?
  162. Marine Machine steering cylinder seals
  163. 500 efi ECM and harness question
  164. Trim pump not sounding very good, Bravo 1 drive
  165. Tach acting strange??
  166. Thru Through Hull Transom Low Raw Water Engine Intercooler Pickup Grooves Channels
  167. how to convert to dry exhaust???
  168. Looking for performance increase in 454 magnum EFI and prop advice.
  169. Loose steering
  170. How much to fill antifreeze container in a 525?
  171. 496 HO Burning Pistons
  172. Flame Arrestor / Filter Elements
  173. Another fuel system setup question - fuel / water filter before or after mech pump?
  174. Let the guessing game begin as what broke in 502 mag EFI
  175. 3" vs. 4" thru hull exhaust
  176. Bilge Pump Question
  177. 98 502mag mpi surging
  178. cover bled hint of color onto white vinyl how to get out
  179. HP500 oil filter mount question
  180. Anyone used ggb inserts in dry tails.
  181. Cam intensity question
  182. 525efi Tach reading high
  183. How to get a little heat with crossovers...?
  184. Boat with shorties question
  185. Who has had issues with afr heads??
  186. Running two different styles of pickups on Bravo drives
  187. Fast ez-efi, holley terminator ?????
  188. Cobalt 342 motor troubles
  189. 525 EFI alarm 2800rpms
  190. How do I set timing with no marks on crank?
  191. 525 efi power loss
  192. Setting X dimension
  193. 525 EFI Too Much Water Pressure
  194. 7.4 lx efi falls on its face and hesitates
  195. Windshield Wiper wrist bayonet connector?
  196. 4 blade prop question
  197. 502 mag mpi?
  198. chicken or the egg, ECm or guage
  199. One for the gear heads.... or maybe a stupid question...
  200. Timing a delco voyager distributor
  201. adjusting valves with intake manifold installed?
  202. Both trim tab switches and drive trim switches not working
  203. Motor does not run right at low RPM
  204. Rudder Spacing From the Hull ??
  205. Flushing with thermostats (with holes drilled)
  206. K Plane hydraulic fitting available lengths? Part numbers? suppliers?
  207. 96' 502 mpi, low fuel pressure
  208. Stupid mistake - have I done any damage
  209. Testing an ignition module
  210. looking for drive shaft housing & bearings
  211. Water pressure question, Before I put it back together?
  212. Rochester question
  213. 525 EFI refresh lifter issue!!!
  214. Carburetor to EFI conversions
  215. what kind of boat is this
  216. 525 efi headers
  217. Has Anyone done high compression e85 motors on a big boat?
  218. TRS drive install
  219. 500 EFI noob help
  220. Detonation melted my piston..... but what caused the detonation?
  221. 1991 Baja steering problem
  222. What fuel pump for a 502 making 600+hp.
  223. 2003 evinrude 115hp 2atroke outboard
  224. cam info needed
  225. zero out tach
  226. What gasket surface cleaner?
  227. Cometic gasket surface RA
  228. 26 hustler vs 25 active thunder tantrum with similar power?
  229. 500efi head upgrades
  230. Merctrans linkage/brackets help (man-shift)
  231. What's a good price and will it work ?
  232. 502 burning up water pump impellors.
  233. vertical stack batteries
  234. Looking for proper Mercruiser service manual p/n's.......
  235. Closed Bow or Mid Cuddy open bow?
  236. Cleaning under trailer bunks
  237. 2 stage sea pump rebuild
  238. 496ho Impeller question
  239. Wasted Bravo 1 swivel shaft/steering pin?
  240. Dual water temp sending units on HP500??
  241. crossover on hp500
  242. upgrading to 33c cables
  243. Crossover temp problem HELP
  244. Dual Ram Power Steering Issues
  245. CMI dealer
  246. O2 Sensor in Riser
  247. Recommended fuel line sizes to support NA 575 HP
  248. y pipe diffrence
  249. Holley carb paint / powdercoat suggestions
  250. Need an answer to back pressure
  251. Blower carbs what to run ?
  252. Ok, Ok, I need a new steering wheel...
  253. Dropped a valve!!!!!!!
  254. Bravo Drive Coupler Grease Cup?
  255. Livorsi / Vessel View / Vantage View ? wanting to upgrade dash
  256. What size is a 86 cig mistress 35??
  257. Are outboards really that much cheaper to run?
  258. need help with a simple wiring issue
  259. 496 or 502??
  260. Power Shift
  261. 500 Efi fuel pressure regulator?
  262. Bouncing Tach, need more suggestions already searched! Confused!
  263. H2x vs donzi
  264. hp500 distributor fit on 500efi
  265. oil temp
  266. Lift points on a '83 Scarab 377
  267. Help with new 540 flywheel selection!
  268. 454 MPI Random Power Loss
  269. Bravo Trim ram - only one working?
  270. Fuel pump Q?
  271. What is wrong with these head gaskets
  272. aftermarket alum heads..clear 454 mag piston domes?
  273. 454 mag mpi lack of power? Idles and revs fine, no miss
  274. How often do your routinely clean your air intake(s)
  275. Speedometer pickup?
  276. Spintron
  277. velvet a73c
  278. 525 water pressure problem
  279. BBC Engine missing side caps?
  280. Morel 4603 lifter noise
  281. What widebands you guys running??
  282. What Prestolite pump for an Alpha 1 '86 outdrive and the differences between them
  283. What is this??
  284. Need help with a inject blown 572's that will not run in gear
  285. anyone have any info on Opcon/Imco whipplechargers?
  286. Carpet under seat bottom bases or not?
  287. Springs pressures and valvetrain life
  288. Nothing left to check? VP 5.7GSI wont start - good fuel pressure, good ecm, wiring
  289. Formula 330 SS re-power
  290. Blowers 454 engines and compression ratio?
  291. What cleaning solution to water in oil cooler and lines?
  292. Bravo 1 props
  293. Cmi air cylinders
  294. Smartcraft/AGI Box ?
  295. Are the mercruiser M1 camshaft still available?? I need One
  296. Very high water pressure
  297. 383 mpi , buzzer , stalling help please
  298. 525 EFI intake gasket options
  299. Best product for bedding trim tabs +transom assemblies
  300. Looking for feedback on carbed HP500s
  301. Wrinkled Looking Vinyl......what's up?
  302. getting rid of the vst tank
  303. DUI Live Wires
  304. Dominator tuning
  305. Wierd tuning issue with Whipple engine - Holley ecu
  306. Bravo XR with finned top cap torque spec
  307. SSM prop pitch
  308. ARP head bolts for 525EFI part #
  309. Valve Cover Breathers: What Works?
  310. 525EFI oil pump driver/sensor position
  311. Hydraulic Steering
  312. b&m 250 mpi blower questions on a 509
  313. mk hammer marine
  314. Flushing tubular oil cooler... yes or no??
  315. Plumbing for flushing or trailer running.
  316. Exhaust Bolts
  317. Old or new partnumbers oil pump 525 EFI ?
  318. Going through electric fuel pumps. Why?
  319. Need a good Prop Shop In Portland Oregon??
  320. 8.2L Impeller Replacement
  321. Oil pump help
  322. AFR with procharged setup
  323. What size headers
  324. 2008 mirage wo6
  325. Pop up cleats
  326. 3/16 inverted flare hose fitting
  327. difference in a 496 mag base model and a 496 mag ec model
  328. Any ideas on where to get parts for Captians Choice Exhaust? 525 sc
  329. how many quarts?
  330. Broken Whipple Pulley Studs
  331. Change plugs after fogging?
  332. Bosch oil filter, thread buggered up
  333. Tranny vs bravo boats
  334. Did I just blow an engine?
  335. 217 mirage fuel gauge
  336. Intake manifold gasket question 454/330
  337. Remote Oil filter
  338. mechanical fuel pump questions on bbc
  339. Fuel injector cleaning
  340. 2 power steering pumps or just 1?
  341. Beehive Valve Springs. What if any are the downfall of these springs??
  342. intake manifold torque lbs
  343. 1987 wellcraft 26 spyder
  344. 496 Vortec Cam Swap to Crane cam?
  345. Cool fuel replacement to Aeromotive
  346. Kohler 5E - Genset Help
  347. Gasket kits question...
  348. Marine grade silicone
  349. Switch / circuit breaker help??
  350. Swim Platform Material
  351. Source for stainless "T" in 1-1/2 inch
  352. Speed Loss From Speedo Pitot?
  353. Engine builder
  354. Cmi e top header question
  355. 575 sci wont start
  356. rocker arm stud diflection
  357. Where to buy hatches
  358. 496ci 585hp tuneup
  359. Mercruiser Exhaust y-pipe 44265-C tube y pipe compatable
  360. Anyone have external full hydraulic steering on sonic prowler
  361. 600sci cam good for a 502 carbureted
  362. HP500 spark plugs
  363. Fast EZ-EFI 2.0
  364. Rub rail
  365. few questions with new build
  366. Exhaust tips and turndown options, and drive shower
  367. High Mileage Vehicle(s) - What oil?
  368. Making interior side panels
  369. Helical asymmetrical oil pump
  370. Latest Generation Mopar Hemi Engines...
  371. How to prevent your arm hairs from standing on end?
  372. Fuel tanks feed unevenly need a hopefully cheap fix
  373. Engine synchronization on hp 500's
  374. Blue 500s hourly maintenance ???
  375. Fiberglass repair in NJ
  376. Anyone ever had a couple parts sand casted or are in the casting business?
  377. Drive alignment question
  378. Can anybody tell me what cam this is?
  379. SBC circulation pump impeller failure.
  380. isky hydrualic lifters in a dart big m block
  381. Another header question
  382. mercruiser impeller vs quicksilver
  383. 502 Mpi procharger to 540
  384. Accessory drive pulley question
  385. mobile delvac
  386. oil cooler thermostat line routing
  387. 496ho oil
  388. Turndowns or DM tips on 29 Fever
  389. Maybe some input from you seasoned guys regarding motor
  390. silencers
  391. What goes here?
  392. Performance Distributors
  393. Late Model Bravo One Drive Swept Back Upper
  394. Help ID 5.7LX Mercruiser Engine
  395. FlexiDock - Dry Docking
  396. Agree or Disagree?
  397. need power sttering hose fitting size or adaptor help please......
  398. pixie dust.
  399. Dilemma with harmonic damper replacement!
  400. iPad navigation app?
  401. 525 Sea/Fuel Pump
  402. Head Gasket Replacement Cost
  403. Alega Growth Prevention - Anyone try/Heard of this idea??
  404. American Offshore vs Eliminator tall deck
  405. Midwest Engine Builder
  406. Mystery 502 Cam?
  407. Twin 525s, different fuel consumption, is this normal?
  408. Mercruiser Bell housing shaft and bearing???
  409. HP500 carb
  410. Looking for Offshore Battery Box
  411. 454 pistons
  412. Help! 30' Chris Craft catamaran planning and prop questions
  413. Bravo XR / Short Sportmaster - Splash Plate ???
  414. 454 mpi doesn't idle
  415. Single Plane or Dual Plane Intake
  416. New SCARAB 31 Excel
  417. Replacing lights with LEDs in a Gaffrig Tachometer
  418. Is there a better roller lifter than gm for .....?
  419. Analog Gauge Interface for new style digital trim limit switch
  420. Convert 1050 dominator from alcohol to gas?
  421. New SCARAB 31' EXCEL!!!!!!
  422. AEM or INNOVATE
  423. Procharger intercooler froze!
  424. anyone out there every get water in oil from exhaust sucking back??
  425. Rod color
  426. Stellings headers straight thru or with tips?
  427. information on the merc 260. boat year is 1986 hhelp please!!
  428. Belt drive Cam Retard?
  429. performance upgrades available for volvo penta 8.2 gsi
  430. 496 NA or SC?
  431. Best overall propeller for a Donzi 33 ZX running on twin 502 efi Mercruisers
  432. 33 outlaw throttle/shifter/indicator cables
  433. Fuel Pump Question 548 ci with 256 blower
  434. ignition coil regular maintence
  435. K planes
  436. MSD distrbutor?
  437. Holley 6-valve Mechanical Fuel Pump - parts?
  438. Spark Timing. How it works.
  439. Tryng to get in touch with -SPYDER26- Derek
  440. Upholstery (seat) needed
  441. How to mount gas tank? Best place to buy.
  442. Compression ratio with 250 B&M
  443. ITS transom on Sunsation
  444. Thunderbolt V Ignitition
  445. 454 efi hesitates and has been running warm
  446. flywheel for hp500
  447. Fuel/water separator, can I drill and tap?
  448. Mercury 500 efi 2002. Were to buy parts?
  449. wix oil filters
  450. Bravo Swivel Shaft replacement/parts questions
  451. Autometer water temp gauge help
  452. Kohler Generator 6.5CZ
  453. Smartcraft alarm...fault 94 pitot chk hi
  454. rust spots in exhaust ports of head
  455. Here's a head scratcher! Piston rings...
  456. B&M 250 carb options
  457. Kaama 400hp Carb GM 454 on 1991 Sonic 31ss
  458. High Volume Fuel/Water Separator
  459. Hydraulic Steering?
  460. 8.1 GXi Audible alarm and rough idle
  461. Ha ! Oil Know It All's Can't Know It All Cause Oil Chemists Don't Really Understand
  462. 6.1l crankshaft
  463. Carb opinions 540's 700 hp...
  464. 700SCI Fuel Pressure
  465. Raylar 511cid Stroker Kit for the 496?
  466. What Thought Crosses Your Mind ?
  467. Accessory brackets
  468. 92oct. VS. 90oct. non ethanol?
  469. 2004 288 Sunsation 280 Trim Tabs
  470. What to use to glue the cockpit sole down?
  471. 575 sci Idle Air Control
  472. o ring distrbutor
  473. Gafrig VS livorsi sending unit
  474. private sellers opinion on buyer wanting survey
  475. 22 razor
  476. Kiekhaefer Control Cables
  477. Engine Temperture ?
  478. Mercury Racing 600SCI with Whipple Stage II
  479. 454 fuel leakdown, add Holley red or new carb?
  480. 420hp 454 questions
  481. Ranting.... King Race Bearings
  482. Run Dry Impleller Thought's???
  483. Help Merc 700 Header Bolt Trouble
  484. hydraulic steering problem
  485. How do you remove top hinge pin ssm #6 ?
  486. engine swap alpha gen question
  487. ONCE Again trying to find some Imron paint
  488. What would cause 3 intake valves to leak on a diesel?
  489. Putting in a hp500 with harness
  490. 496 Mag HO water circulation problem
  491. 300 verados choking out
  492. Oil filter...
  493. Identifying a cam, help please
  494. Any suggestions !!!
  495. Power vs reliability
  496. HP increase
  497. Attaching LEDs to trim tabs
  498. Big Chief
  499. cylinder head question
  500. Header gaskets