Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: 1974 Johnson 55 H2O squirt help

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133458

Water is coming out where lower unit bolts to leg. It is spraying out with gusto. It spits out a little bit of water from upper exhaust holes. What did I do wrong? I did have apart to reseal. Or is this normal?

Please Log in to join the conversation.

Florida's Amphicar restoration destination

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133477

I have decided to replace thermostat and look at pressure relief valve.

Please Log in to join the conversation.

Florida's Amphicar restoration destination

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133479

Dave; Johnson didn't build a 55hp till 1976 unless it is a 3 cylinder? Then it is a 1968 or '69? Here is a picture of parts for two cylinder thermostat, grommet, & seat at the bottom of the cylinder head.

www.marineengine.com/parts/johnson-evinrude-parts.php?year=1976&hp=55&model=55EL76E&manufacturer=Johnson§ion=Cylinder+%26amp%3B+Crankcase

If it is the older 3 cylinder model then here is the picture of the parts at the top of the cylinder head. Just a seal & thermostat of a newer design.

www.marineengine.com/parts/johnson-evinrude-parts.php?year=1968&hp=55&model=TRL-10R&manufacturer=Johnson§ion=Powerhead+Group

Some shooting out of water at the parting line of the gearcase is normal.

Dan in TN
The following user(s) said Thank You: Dave the Wave

Please Log in to join the conversation.

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133481

Thanks. My power head is 1977. I wonder if my lower unit is a different year. My infared thermometer is missing so I dont have an accurate measurement. Head temp felt hot. Or hotter than I remember. Not really knowing...I think the thermostat is not opening properly. Kind of amazes me how a forty year old boat engine can run as well as this one.

Please Log in to join the conversation.

Florida's Amphicar restoration destination

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133482

Thanks for link. It made ordering parts very easy.

Please Log in to join the conversation.

Florida's Amphicar restoration destination

1974 Johnson 55 H2O squirt help 11 months 2 days ago #133486

You can't have a '74 gearcase on your motor.( 3/4" diameter driveshaft). It would shift backwards. Look at the type gearcase on a '74. It is hydro-mechanical. Has a oil pump which the '77 does not have. I also believe I remember your '77 having the smaller diameter driveshaft (1/2" app?) by then. Not sure about that, but I believe that happened in '75 with the last 50hp? You will notice your gearcase has an Archimedes screw which brings the oil to the top bearing of the driveshaft.

www.marineengine.com/parts/johnson-evinrude-parts.php?year=1977&hp=55&model=55EL77D&manufacturer=Johnson§ion=Cylinder+%26amp%3B+Crankcase

It is important that you decide what you have before ordering parts. Everything is different. Your '77 has a poppet valve & grommet seat that will surely need replacement. Be sure to get one while ordering parts.

www.marineengine.com/parts/johnson-evinrude-parts.php?year=1977&hp=55&model=55EL77D&manufacturer=Johnson§ion=Cylinder+%26amp%3B+Crankcase

Reference #s 12,13,14 are thermostat, seal & grommet. I would be sure to replace those. Check poppet & spring. Occasional a spring will break.

Dan in TN

Please Log in to join the conversation.

1974 Johnson 55 H2O squirt help 11 months 1 day ago #133498

Thanks for link. It made ordering parts very easy. I boiled the thermostat and it was bad in closed position. Now waiting for gasket and parts.

Please Log in to join the conversation.

Florida's Amphicar restoration destination
  • Page:
  • 1
Time to create page: 0.124 seconds

FG Login

Donate

Please consider supporting our efforts.

Glassified Ads

7-1/2 Hp Johnson
( / Engines)

7-1/2  Hp Johnson
07-16-2018

Eaton outdrive for sale
( / Parts / Miscellaneous)

Eaton outdrive for sale
07-15-2018

1972 Glastron - Goldfinger
( / Boats)

1972 Glastron - Goldfinger
07-10-2018

FiberGoogle

Quick Search

Who's Online

We have 2503 guests and 15 members online