Technical Discussion [Archive] - Scream And Fly Powerboat and High Performance Powerboating Discussion Forums

260 Intake Horn modification? (2 replies)
Help Choosing a prop New to me 21 Cat Armstrong (4 replies)
Mercury Tech 240 Spoet Jet (1 replies)
Who will paint outboard parts? (15 replies)
Best choice for a 260 fuel pump (2 replies)
Connecting rod question? (6 replies)
Mercury Tech Cooling flow / pisser on Mercury Racing motors XR2 (14 replies)
Prop mod (1 replies)
99 promax midsection question. (12 replies)
Mercury Tech replacment 260/280 injectors (7 replies)
(Mostly) Merc Tech info (0 replies)
Mercury Tech CLE Gearbox - Ever seen one like this? (6 replies)
Balance question (2 replies)
2.4-2.5 rev to 10 k can anything be done to 90-115 to get them over 6k? (15 replies)
Wiseco top Pin pistons? (3 replies)
Yamaha Tech Primer solenoid (9 replies)
OMC Tech V4 x-flow might need LWP (13 replies)
Merc 7 petal two stage oem reeds (1 replies)
Bow lifting propellers? (5 replies)
Merc V6 Lower unit info. (21 replies)
Early style pre Bridgeport mercury 2.4 efi front mounted ECU box (1 replies)
Yammi V-4 cowling question (1 replies)
Merc prop converson to OMC (0 replies)
remote trim pump (15 replies)
carbs (2 replies)
I built an advanced Prop/Performance Calculator and Database (4 replies)
apples to apples (10 replies)
Vst not producing pressure out the test port (4 replies)
2.25 pro max fuel in bleed hoses (20 replies)
2015 Yamaha 70 hp 4 stroke low fuel pressure (5 replies)
how do i get this piece out of the single ram (10 replies)
Diagnostic tool (4 replies)
Mazco RE prop - replacement hub (3 replies)
Mercury 1993 one piece cowling ? (3 replies)
Removing 10 years old PPF off gelcoat - any tricks (4 replies)
Mercury Tech 20 hp electric start (15 replies)
Yamaha Tech 2006 Yamaha 155TXRD lower crank seals (1 replies)
Mercury 300X rebuilder??? (1 replies)
240 sport jet info? (19 replies)
240 sport jet info? (0 replies)
Optimax Oil injection system. (4 replies)
E-TEC 2.6 V6 Bottom Flange Pitting (1 replies)
Info on older mercury thru hub cleavers. (2 replies)
Keep or replace engine - comparisson (10 replies)
NOS Question? (3 replies)
Chris carson marine (13 replies)
1993 MERCURY 135 HP motor mods? (3 replies)
oil seal replacement with out the special tool (6 replies)
Wingplate Hydraulic Steering (4 replies)
Adapt mercury square steering hub to teleflex? (4 replies)
93 2.5 260 Dallas Tx (9 replies)
Upper tilt pin-15" mid (4 replies)
1957 Mercury Mark 75 pistons (3 replies)
Wiseco Pistons (4 replies)
245/260 Carbs (5 replies)
Looking for a head (3 replies)
Mercury Tech Inline Block Preservation (2 replies)
Who can balance a flywheel for me. (37 replies)
Can you retain Analog Gauges if you replace older Mercury Outboard with New 300R? (4 replies)
Gambler w/ 200 SuperMag consistent Hub Failure/Exhaust Leak/Timing (6 replies)
Mercury Tech RPM stays 7000 RPM regardless of Propeller pitch 24-29 Choppers or drags. (7 replies)
yamaha 2.6l cylinder heads - what's the difference? (2 replies)
141 connecting rods (0 replies)
Drive shaft repair (3 replies)
Re ring and hone? (6 replies)
300x Powerhead (9 replies)
trim gauge issues (10 replies)
Mercury Tech 87 voyager prop selection problems (7 replies)
3 liter lower (3 replies)
Verado power steering (2 replies)
How hard should it be to turn an outboard by hand? (5 replies)
Super speedmaster service manual (0 replies)
James Ruck or his business? (3 replies)
Connecting rod weight question? (5 replies)
Mercury Tech Mercury V6 | Piston Compression Height (13 replies)
"Over the Hub" Props for Mercury 400/450 Single Engine Boats - Plane Issues? (10 replies)
260 cylinder head bolts, Washer or not. (5 replies)
1988 Mercury 2.0 v6, need some pros on this one. (30 replies)
Omc crossflow flywheel (6 replies)
2.5 260 flywheel reassembly. (20 replies)
What is a K block? (13 replies)
Water in cylinder - Mercury 200 EFI 1996 (5 replies)
1988 Mercury 150 XR4 (4 replies)
Rust prevente (6 replies)
Which 3 cylinder Mercury do I have? (9 replies)
86 Evinrude 200 XP Shift Linkage Help (9 replies)
Diamond ported 260? (2 replies)
Mercury Tech 2.4 Front Half (5 replies)
Oil? (18 replies)
Restrictors vs thermostats (5 replies)
Chris Carson (5 replies)
2.5. No power over 2k (13 replies)
oil inj block-off (9 replies)
Rod Slot improvement on a 260 (4 replies)
Rod construction? (4 replies)
Yamaha Powerhead Compatability? (1 replies)
Bleed line function? (11 replies)
C case (3 replies)
Quieting a 260 just a bit. (8 replies)
Early 80's Mariner 150 Magnum carbed (3 replies)
Anyone built their own electric trailer dolly? (34 replies)
1962 Mercury 500 (50 hp) weight and gear ratio (5 replies)
Bleeding a hydraulic sidemount ram with no bleeder valves question (5 replies)
Etec blowout speed (7 replies)
Mercury Tech Mercury Enrichment Wiring (4 replies)
Help rebuilding In-Control side mount shift/throttle combo (2 replies)
Help (12 replies)
Shaving heads (5 replies)
Opti 300xs sportmaster (2 replies)
Mercury Tech 300X on Nitrous?? (1 replies)
Opti fuel filter (3 replies)
Best intake for stock 5.7 vortec / holley sniper? (3 replies)
240 sport jet (23 replies)
here's one for tha "by tha book" guys.... (17 replies)
1967 folding 3hp johnson (1 replies)
Acu programming? (1 replies)
Mercury Tech Brucato stuck in prime/choke mode (7 replies)
2.5 260 timing question. (5 replies)
Snappy (2 replies)
2000 225 PM getting hot. (20 replies)
Fuse connection? (4 replies)
Sport Master Gear Case Sizes and Power Requirements? (0 replies)
Trim wiring? (4 replies)
Clog ? (1 replies)
Water pump damage (5 replies)
electric fuel pump recomendations for 200 hp merc carbed (21 replies)
Wiring diagram? (1 replies)
Power head stuck to mid (7 replies)
Mercury Tech Strong tell tale flow when cold? 150 efi 2.5L, New thermostats. (1 replies)
Need new coils for 280 con. OEM or Buckshot? (1 replies)
Re powering 28 skater with merc 300R (7 replies)
oil is important for roller bearings (0 replies)
Front half has odd wear from sealing ring. What to do? (5 replies)
ask me how i like my drag4 prop[test] (11 replies)
Alpha SS/V6 outboard Gear case interchange (13 replies)
Head ? (2 replies)
sportmaster lower unit (6 replies)
Mercury Tech DTS unit lost its location (0 replies)
shifting gears (12 replies)
V-pad talk (8 replies)
Increasing 1999150 efi rpm (2 replies)
Shave? (7 replies)
Exhaust cover? (1 replies)
Break in on a 260 EFI motor. (5 replies)
2.5 drive shaft Timken (2 replies)
Reed stuffers? (6 replies)
To many squeezing of primer bulb (9 replies)
Reeds,A Popular Subject,thoughts and facts (6 replies)
Rubber cages? (12 replies)
Help identifying carburetors (2 replies)
2002 mercury 200 saltwater performance mods (1 replies)
Reed stops? (15 replies)
Has anyone actually dynoed the drag 5 reeds vs the seven petal reeds? (11 replies)
Promax/FF ? (13 replies)
Talon 22 Max 5 Prop Question - to cut the barrel shorter or not? (5 replies)
Mercury Tech Which fuel electric pump for a PROMAX? (6 replies)
Merc 400R 2.6L Overspeed Rev Limit ? (3 replies)
Switch to solid mounts, mount bolts just spinning (Mercury mid) (11 replies)
300x Advice (1 replies)
250efi Fuel ecm (1 replies)
O-ring motors, best way to raise compression? (11 replies)
Promax carb? (16 replies)
Land & Sea | Engine Development (25 replies)
Water leak? (14 replies)
ignition dash toggle (12 replies)
Tachometer hook up question? (2 replies)
Mercury Tech Source for 2.5L Fuel Rail O-rings? (5 replies)
Torque Tab Question. (8 replies)
On the Yamaha 300F engines what is the cylinder plated with? Can they be replated? (4 replies)
Mercury Tech 280 Motorola electronics capabilities (3 replies)
4/7 ? (8 replies)
Reed cages (2 replies)
Fast Fred (4 replies)
Mercury Tech Optimax Storage (1 replies)
Rod slot question ? (1 replies)
1150SS. 15" Identification (44 replies)
Uflex Helm pump (3 replies)
Mercury Tech Mercury 2.5L 200 (12 replies)
Mercury Tech 4cyl 2-stroke WOT spudder when hot (9 replies)
recomendations (2 replies)
1993 Mercury 135 HP V-6 Water presssure fitting hook up? (2 replies)
WH Carbs idle jetchange results (3 replies)
12v on-off line from p.h. (4 replies)
Early WH 15,18&20 big bore carb internal differences (5 replies)
300X won’t idle in gear (1 replies)
Help! 2.5l 200 m849x ECU stumbles and backfires part idle (2 replies)
Oiler gear? (2 replies)
Engine swap cooling issues. (2 replies)
Mercury Tech 1991 Black Max stator (5 replies)
Carb? (6 replies)
Epoxy ? (8 replies)
7 petal? (27 replies)
What Gear Lube for extreme pressure and medium to high temp? (6 replies)
High Water Pressure 2.4 BP (17 replies)
Gray wire? (2 replies)
Prop shaft Mercury 450R (2 replies)
175 Optimax Pro xs (17 replies)
Vevor vs Seastar (9 replies)
School me on OMC V8 Outboards (45 replies)
Internal Engine Machining (1 replies)
Mercury bridgeport 2.4 missing water cooling tube in mid (3 replies)
Mercury Tech 1984 115hp Mercury lower water pump housing advice needed (3 replies)
Action marine 16’ weight help (0 replies)
Pop off? (3 replies)
Water dump? (1 replies)
1993 2.0 135 HP carb question (2 replies)
Baystar hydraulic helm symptom, shed some light? (17 replies)
Cle lower (2 replies)
300r ? (4 replies)
How to Access Oil Pump - Promax 300 (3 replies)
Trim and tilt issue - lower rams going in before motor lowers (9 replies)
Newbie question (2 replies)
Power head swap question. Can I simply replace blown 225 efi with 98 225 carbed poweh (0 replies)
Big/small? (1 replies)
Brucato acu (21 replies)
Mercury Tech XR6 tilt motor smoked, cant find the correct replacement (9 replies)
225 Promax Build (9 replies)
Smartcraft harness (1 replies)
Verado pencil coil test (0 replies)
cir-clips (33 replies)
Mariner 220 EFI misfire (9 replies)
Mariner 220 EFI misfire (0 replies)
Seastar bushings worn cylinder (see photo) question (1 replies)
Honeing stones? (0 replies)
4-Beep Oil(?) Alarm (91 replies)
Snapped (12 replies)
3.0 sporty rh noise (4 replies)
V4 Crossflow Water in cylinders (28 replies)
Mercury Tech Starboard temp sender/switch 1997 promax 225 2.5 (0 replies)
Operating temperature/ water pressure (1 replies)
Powers laser slide gains? (45 replies)
Mercury Tech Carb V6, What do we use to remove and tighten needle seats (10 replies)
260? (4 replies)
Ace fuel supplement (2 replies)
Mercury Tech 1984 115hp Inline Switch Box wiring (6 replies)
2pc mid , upper mount drain hole? (2 replies)
Tcw3 (4 replies)
How to find the cause for molten piston? (17 replies)
23 Degrees before TDC (5 replies)
Mercury 1994 225/3.0 no spark #3 cylinder (3 replies)
Mercury Tech parasitic draw in the Verado clean power circuit (3 replies)
2000s oring F stamp 200 hp - anyone have one rn? (5 replies)
Yamaha ECU (11 replies)
Failure theories? I got a peekhole in the block (Merc 2-stroke V6) (9 replies)
Autometer Water temp (13 replies)
2.0 vs 2.4 high rpm build (2 replies)
Mercury Tech 2.4/200 is this the factory water pressure adapter rig? (38 replies)
Difference (1 replies)
Mercury 2.4l Upper crank seal leaking (5 replies)
Preference? (3 replies)