Mercury Thunderbolt running after sitting 3 yrs 

I learned to Ski with our 1966 I believe it was looked very much like this one. Pull start ect. I watched my father rebuild it. Great little motors. I feel one of Mercs. Best ever. !

i had that same motor. never failed. ever.

I replaced the inner and outer manifold covers,and a new engine wiring loom,im just a carpenter!, big job for me,very nervous about starting it as i made my own gaskets,,they are gnarly!.Anyways,tonight it fired up after 3yrs of sitting,dragged to fiji and never used,back to NZ and she runs sweet ! im so stoked ! havnt had it on a boat yet might just leave it on the stand and listen to it,they are very throaty,go the redbands. mine is the 650 late 71, last of the 4cyl.

That's when Mercury's were beautiful

Love the red bands.

Hi Jim.Thanx for the info.I just took my motor to one of my good friend's who has a boat shop.He's an awsome tec.he's worked on boat,car,deisel's,coach,farm eq,ect.He need's some roofing work done.And thats my busness I'm a goofie roofer lol And he owes me a fav anyway.Thanx again for the info Cheer's

The 500 was always beautiful!!!

the 500 was one of the best made

Very cool brother 😎

I love my old mercs!

I still run a blue band 200 thunderbolt on my dive boat starts 2nd pull dead cold everytime one pull when warm bloody good motora

I just got a 1975 bayliner mosquito with a 65 hp merc all original on an ez loader , all in great shape for 1500 cash .

Love the recoil starter handle! Fastjeff

I have the same engine but in the 4hp model and iIt still works great. Only use rec fuel without ethanol.

when the water do not show up on the upper indicator, and not enter to the gearcase you know the impeller is bad, with the hose attaches as soon the motor run the water suck in,

mine has been sitting for 5 years and it still runs

could you tell me where you got the gasket to that motor from??? I have a similair model and im dying to fix this gasket but i dont see any online.

O motor está funcionando melhor que o velho!!!

What is the price range on a 50 horsepower mercury outboard motor

@Etrician55 I have a 1968 Mercury 500 with thunderbolt ignition.

I have a 1976 16.5' Deep Hull Starcraft with a 50 HP Mercury motor also from 1976 that I got from my Dad, what do you think the chances are that the motor is still ok after not running for 20 yrs?

hey their. i just bought one of these. tried to pull start it but it wont pull. is it in gear or is it seized?

I have 1982 that been sitting over three years but looks like new it's 1982 50hp

it is troo a 1971 Merc 500 Merc outboards had red trim from 1968 to 1971

To hell with the pull start, get a electric starter kit.

it can happen. not always but it can.

What was the problem it not pumping water? I have same motor and not peeing.

R they 2 stroke or 4

What year

looks like the impeller is shot. should be coming out the exhaust and the pee hole.

Dear sir.Hi there seem's like you really know your boat motor's.I've got a 1973 20hp mercury Kiekinhaufer,I think I spelt that right lol.Got no spark my kill switch seem's like it might be stuck not sure.Can I disconect the kill switch to see if theres spark.Any other suggestion's.I'm good with small motor's.Just don't have alot of experiance with boat motor's.What a pain in the ass to get at the coil's and such under the pull start recoil.wow.

hey i have a 1966 just like yours, set and cleaned points and new plugs, but no spark what do you think is wrong? lost the key whats your key number? RSVP

you need to eat you're wheaties? or make it a electric start

how do you kill it.

lol.. it is a boy.. my omc is definetly a girl:P