1965 Johnson 33hp super seahorse hard to turn over

[SuperSeaHorse_33hp]

This motor is really hard to turn over not froze because when I took the spark plugs out it was easy I think the compression relief valve is it but not really sure it is a 2 stroke just bought it for 30 really like the older motors but anyway the starter don't turn it over I can only turn it over by hand any help would be great thanks.

 

[racerone]

There are no compression relief valves on this motor.--------Have the battery load tested.-----Have the starter checked out.

 

[F_R]

Of course somebody could have put an old 35hp powerhead on it, which has compression relief. But even if that were true, the relief valves are not actuated when using the electric starter.

 

[SuperSeaHorse_33hp]

There are no compression relief valves on this motor.--------Have the battery load tested.-----Have the starter checked out.

Then why is it so hard to turn over the starter and battery were good it feels like trying to turn a 100 hp by hand any other thoughts.

 

[racerone]

No oyher thoughts at all.----If it turns easy with the plugs out you have starter ./ battery problems.

 

[HighTrim]

Curious, how do you know the battery/starter/wiring/connections are good?

The battery, as stated, needs to be load tested. Any auto type store can do this for you for free.

Voltage drop testing can isolate faulty sections of the wiring circuit.

Any and all connections need to be filed to a shiny polish. No corrosion, rust, etc....

Any sections of wiring, on both POS and NEG, need to be tested. Crunching when you flex it is a sure sign of rot.

 

[SuperSeaHorse_33hp]

No oyher thoughts at all.----If it turns easy with the plugs out you have starter ./ battery problems.

You guys need to see one of these motors with this problem in person I have seen many 2 stroke have the same problem on different and this chat one day you can turn it over next it can barley do a full spin with the starter and pull starter

 

[HighTrim]

Oh Boy.

 

[RCO]

Those old big twin series motors are hard to turn over. Listen to the advice above.The electric starters were marginally reliable when new, and now the starter and wiring is 50 years old. Everything needs to be perfect, especially the battery and cables. There is a newer starter you can put in that will spin the motor over faster.

 

[oldboat1]

Can't agree there, RCO. Find the '50s and '60s staters reliable ones, with a lot of torque. Systems have to be clean and corrosion free, but that is always the case. With most of the early systems, the starting circuits are pretty easy to duplicate if it comes to that.

 

[SuperSeaHorse_33hp]

Oh Boy.

You didnt help

 

[SuperSeaHorse_33hp]

Those old big twin series motors are hard to turn over. Listen to the advice above.The electric starters were marginally reliable when new, and now the starter and wiring is 50 years old. Everything needs to be perfect, especially the battery and cables. There is a newer starter you can put in that will spin the motor over faster.

Imma make a video of it tomorrow or the next day then the world will see the problem