Search results

You can do as you like but if you spend $55 for an OEM merc impeller and change it every 3 years you wont have this issue. Do you recall if that is an SEI impeller? one of the professional mechanics who is on the marine engine forum mentioned that happening with their impellers I just changed...

On the muffs you have no load so it doesnt take anything to rev up. Boat is much different its like a loaded truck going up a steep hill all the time. Always do a water test when buying a boat. It probably isn't a big deal since it sounds like you have mechanical aptitude. I prefer OEM merc...

I would more suspect carb than fuel pump based on what details you gave. thinkin more accelerator pump or fuel level in bowl issues since you can roll into It. did you verify when stabbing the throttle you get two good stream of fuel out of the accelerator pump nozzles? The Thunderbolt 5 has...

those look like alternator wires

It really depends on how you use your boat. If I recall you have lighter faster boat vs the arse heavy boat I have that doesn't go over 50. Most of my time is with my daughters and their friends skiing/ wakeboarding or swimming. Four blade gives great benefits for that use.

Depends if the blades were the same a little more bite and slightly lower rpm at WOT. If they have more cup different blade profile difference might be more dramatic

To reduce prop pitch you have to change your prop to one with a lower numerical pitch. If you have a 15" pitch now and the engine was in good working order going to a 15" pitch would bring rpm up about 800rpm at wot I would check the drive serial number on the drive matches the drive serial...

X2 on the delco its an OEM quality complete set up, the usual go to for replacing merc unique part$. It is capable of working with the shift interrupt and common enough that any reasonably talented mechanic should know how to service it vs the less common DUI. Also has total timing of 25 so...

If your WOT rpm is accurate you need to reduce prop pitch or you have an engine issue. Did it ever get more speed ? Was the drive replace with a different ratio? Agree start with compression test and look at basic tune up items

I would look in the throttle bores at idle and see if you see any fuel dribbling down off the boosters above the throttle plates should be dry at idle. Did you by chance replace the needle screws that control idle mixture ? Could be wrong screws? Or were damaged original ones reused? If you are...

I would check the plugs to see if you are lean as well.

Measure fuel pressure …

They would’ve had to have taken the power steering belt off to change the alternator belt so they probably didn’t tighten it up enough

Front engine needs to go down not up to get more witness marks on the top of the tool I don’t know if it’s the same for three point no but on my five point no the side mounts are an inch and 1/16th or an inch and 1/8 th I can’t remember offhand If your seat back is like mine it may have a...

What your fuel pressure?i assume you mean the vent for the fuel bowl? There is no vent for power piston you can see, it gets pulled up by manifold vacuum. If you see fuel on the top of float bowl your fuel pressure is too high overcoming the needle and seat, or the needle and seat/ float...

This is the correct way to install a fresh water system on an alpha. to the OP before you hang anyone, look and see if there is room, and if that will be any easier to change. Some of the comments folks have made about the contortions they need to do to change a belt or crank pump makes me...

Agree with ted i would be verifying there are no leaks On exhuast manifolds elbows and risers . I would think based off your comments it hydro locked while they were swimming. other thing pressure test cooling system if you dont find issue with exhaust. now that you have it running make sure...

Agree with other coments regarding machining and piston profile . did you remove the drive and see if the engine is siezed or drive, gimbal bearing, ujoints?

when I repowered. I changed the oil after 1 hr, then at 10 hrs, then at end of season per my normal routine. Maybe be over kill but oil changes are cheap and you can see if metal particles are in the oil

Yeah i know you dont like 4 blades…. both the enertia and rev 4 played very well at high trim levels , if i recall the enertia could trim almost all the way up. the rev 4 as you are going faster you can keep adding trim up, if you slow down and are still trimmed out and then punch it it will...