1987 Mercruiser 165 Inline 4 wont start

rollo11

Recruit
Joined
Apr 25, 2007
Messages
5
Hello. My friend gave me a 1987 Regatta Boat with a Mercruiser 165 4 cylinder engine. When he got the boat it wasnt running so no reliable history. The starter was missing so i replaced. Distributor cap/points worn so i replaced. I removed new plugs, manually rotated engine removed distributor, checked direction of rotor and ran plug wires from there (1,3,4,2).
Also, checked compression numbers really consistent but honestly dont have tester to fit right in tight area (darn coolant reservoir). I removed flame arrestor and am getting fuel, also primed pump by pooring a little gas directly in carb. Bought new battery yesterday and it turns over and is so close to starting. I think my next step is to get timing light but looking for recommendations before i spend the money. The only 2 issues i have found with motor is automatic choke on carb not working and front seal bad (weep hole leaking coolant).

Thanks and sorry for long post,
Ron
 

rollo11

Recruit
Joined
Apr 25, 2007
Messages
5
Re: 1987 Mercruiser 165 Inline 4 wont start

Update... went back out today and found issue was in throttle linkage. Someone had been tinkering with so a couple of adjustments and running ok. Now its time to work on darn weep hole (front seal). This is horribly designed engine.
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,346
Re: 1987 Mercruiser 165 Inline 4 wont start

leaking weep hole is an indication of worn cam seals. Speedi-Sleeve is the way to go.
 

stonyloam

Vice Admiral
Joined
Mar 13, 2009
Messages
5,827
Re: 1987 Mercruiser 165 Inline 4 wont start

Now its time to work on darn weep hole (front seal). This is horribly designed engine.

Actually it is not that bad.....:rolleyes: Before you go any farther (the seals can wait a bit) you need to find out what condition your engine is in. Now that you have it running you should do a compression test and a cooling system pressure check (you can borrow the tools from Auozone). Those two tests will tell you the condition of your head gasket and cooling system. Next you will need to pull the outdrive and check the alignment, gimbal bearing, U-joints and bellows, and change the impeller and housing. Once you get that stuff done you will have enough information to decide how mugh you want to spend to get the boat in the water. If you decide to proceed, do the seals and get er on the water. If you can get it running correctly you may decide that it is not such a bad engine after all. Welcome to the "470 Club":facepalm::D
 
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